Search Results 1-20 of 330

  • Relationship between Upper Body Posture Angle and Vertebral Body Posture Angle in Lateral Flexion and Rotation Posture

    Tsuchiya Yoshio , Tanaka Takayuki , Kamishima Tamotsu

    … <p>Lumbar loading causes increased intervertebral pressure and is an important factor in low back pain. … However, it is difficult to quantitatively judge the actions that affect lumbar load and the magnitude of lumbar load increase. … Low back pain occurs not only in the workplace but also during activities of daily living. …

    Advanced Biomedical Engineering 9(0), 181-188, 2020


  • Optimal foot-position of caregiver based on muscle activity of lower back and lower limb while providing sit-to-stand support

    Kitagawa Kodai , Nagasaki Takayuki , Nakano Sota , Hida Mitsumasa , Okamatsu Shogo , Wada Chikamune

    … [Purpose] In caregivers, low load posture is necessary to prevent lower back pain during patient handling activities such as sit-to-stand support. … The aim of this study was to investigate the relationship of anterior-posterior and lateral-medial distances between feet and activity of the spinae erector muscles to determine the optimal foot-position for reducing stress on the lumbar vertebra without increasing spinae erector muscle load. …

    Journal of Physical Therapy Science 32(8), 534-540, 2020


  • Verification Tests of a Lightweight Assist Suit for Assistance of Lifting Motion and Its Evaluation Based on Lumbar Load Model for Holding Heavy Object with Half-Sitting Posture  [in Japanese]

    Yoshida Kotaro , Ishii Chiharu

    … <p>In this study, the power assist suit which has two McKibben type pneumatic artificial muscles filled with low-pressure air on the back side of a full harness type safety belt (passive-type assist suit) was extended so that it can enhance the assist ability to lift heavy objects by providing a compressed air to the artificial muscles (active-type assist suit). … In addition, the lumbar load model was derived to evaluate the assist suit for holding a heavy object with half-sitting posture. …

    Journal of the Robotics Society of Japan 38(6), 559-566, 2020


  • Core Stability and Hip Exercises Improve Physical Function and Activity in Patients with Non-Specific Low Back Pain: A Randomized Controlled Trial

    Kim Beomryong , Yim Jongeun

    … <p>Approximately 90% of low back pain (LBP) diagnoses are non-specific (NSLBP; … Core stability is essential for proper load balance within the pelvis, spine, and kinetic chain, and core stability exercise (CSE) is an exercise treatment regimen for LBP conditions. … Pain intensity, lower back instability, and hip muscle flexibility were measured to assess physical function. …

    The Tohoku Journal of Experimental Medicine 251(3), 193-206, 2020


  • Amplitude Control for Linear Resonance Actuator Using Sensorless Load Estimation Method  [in Japanese]

    Mototsuji Tomoaki , Kato Masayuki , Heya Akira , Hirata Katsuhiro

    … The amplitude of an LRA changes with an external load therefore, the compensation for load is essential. … We have proposed an amplitude control method by using a back-EMF. … However, it has two problems: the low responsiveness in the transient state and the amplitude variation in the steady state. … To address these problems, we proposed our method with a sensorless load estimation method based on energy conservation law. …

    IEEJ Transactions on Industry Applications 140(7), 534-541, 2020


  • Biomechanics of the Lumbar Facet Joint

    Inoue Nozomu , Orías Alejandro A. Espinoza , Segami Kazuyuki

    … Axial compressive load transmission through the tip of the inferior articular process can occur in the extended position, especially with reduced disk height, which may cause capsular impingement and low back pain. …

    Spine Surgery and Related Research 4(1), 1-7, 2020

    J-STAGE  Ichushi Web 


    石田 翼

    … To reveal how the motor works, its dynamic properties under various mechanical load conditions are required. … In this study, we developed an assay to monitor the motor rotation at extremely low load. … We attached a 60 nm gold-nanoparticle directly to the straight hook via Cysteine residues, and monitored its motion by back-scattering microscopy. …

    法政大学大学院紀要. 理工学・工学研究科編 (60), 1-2, 2019-03-31

    IR  DOI 

  • Development of the electric power assist suit for work load reduction  [in Japanese]

    YOSHIMI Yoshitaka , KOBAYASHI Yuki

    … However, since strenuous work remains, many laborers will be required to continue with activities that can cause back pain. … Therefore, it is necessary to prevent backaches to ensure current as well as new laborers are safe and will not develop back strains and pains. … In this paper, we describe the electric power assist suit developed for the purpose of work load reduction. …

    The Proceedings of Mechanical Engineering Congress, Japan 2019(0), S40112, 2019


  • Development of Power Assist Mechanism for Lumbar Motion  [in Japanese]

    Kyodo Kazuhito , TAKAHASHI Katsumi , YOSHIDOME Tadashi

    … <p>Low back pain of workers is increased in workplaces that involve hard work. … Therefore, power-assist suits have been developed to decrease the load on the waist joint. … However, previous power-assist suits have had problems such as low output or heaviness. … The assist suit is developed to reduces lumbar load in lifting. …

    The Proceedings of the Dynamics & Design Conference 2019(0), 419, 2019


  • Fatigue crack growth behavior of friction stir welded A6063 under non-stationary variable amplitude loading  [in Japanese]

    KIMURA Hayahide , NAGANO Tomohiro , MATSUNAGA Yoshiaki , KOYAMA Atsuhiro , TAKASE Toru

    … Crack length was measured using the unloading elastic compliance method with the back strain gauge. … Also, in the case of Hi-Lo two-step loading fatigue test, the crack growth rate decelerated after load fluctuation. … In addition, when the mean stress intensity factor after load fluctuation is high, the smaller the deceleration of crack growth rate is low.</p> …

    The Proceedings of Conference of Kyushu Branch 2019.72(0), F33, 2019


  • Development of a flexible and lightweight assist corset with a posture feedback control function  [in Japanese]

    NISHIHARA Masahiro , NISHIOKA Yasutaka , YASUDA Toshihiko , YAMANO Mitsuhiro

    … <p>Low back pain is one of the most aware osteopathic symptom. … There are cases use a corset as one of methods of treating low back pain. … By utilizing a posture feedback control, it is possible to change the rigidity against the muscle load. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2019(0), 1P1-K04, 2019


  • Proposal of lower limb power assist suit for Squat Lifting considering walking  [in Japanese]


    … <p>Low back pain is an important international health problem. … Factors of back pain have a burden on the lumbar region due to the handling of heavy objects. … The Japanese Ministry of Health, Labor and Welfare recommends Squat Lifting as a method with less load on the waist. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2019(0), 1A1-I02, 2019



    Zhang Bowen , Peng Minjun , Cheng Shouyu , Sun Lin

    … Two different schemes for simultaneously performing the selecting feature and the training of predictive model of system behavior based on back propagation neural network (BPNN) are presented. … PCA has high selecting feature performances with low numbers of parameters. …

    The Proceedings of the International Conference on Nuclear Engineering (ICONE) 2019.27(0), 1020, 2019


  • Two-class load weight discriminator in a lifting-up task using acceleration metrics of human body  [in Japanese]

    YAMANE Yusuke , FUJII Fumitake , ISHIBASHI Naoya

    … <p>Low back disorder is a commonly observed worker injury in Japan. … Statistical figures revealed that there were 600 to 900 workers who were absent from work more than four days every year because of the low back pain caused by handling heavy objects in the manufacturing industries. …

    Transactions of the JSME (in Japanese) 85(880), 19-00189-19-00189, 2019


  • Evidence of trunk muscle function and athletic training  [in Japanese]

    OKUBO Yu

    … <p>Adequate knowledge of trunk muscles is useful to provide the best possible treatment of low back pain, as well as for improvement of athletic performance. … Moreover, local muscles are partially activated through low-load tasks and postural control such as with walking (tonic activity). … In contrast, high-load movements such as running and jumping lead to co-activation of local and global muscles (phasic activity). …

    Japanese Journal of Athletic Training 5(1), 3-11, 2019


  • Relationship between surface electromyography of the spinae erector muscles and subjectively adjusted step length in the supporting standing-up motion

    Kitagawa Kodai , Uezono Tsuyoshi , Nagasaki Takayuki , Nakano Sota , Wada Chikamune

    … [Purpose] Caregivers experience low back pain owing to frequent patient handling motions such as supporting the body while standing up. … To prevent low back pain in caregivers, low load posture while engaging in patient handling motions is required. …

    Journal of Physical Therapy Science 31(11), 869-872, 2019

    J-STAGE  Ichushi Web 

  • A semi-rigid thoracolumbar orthosis fitted immediately after spinal surgery : stabilizing effects and patient satisfaction

    Goto Tsuyoshi , Sakai Toshinori , Sugiura Kosuke , Manabe Hiroyuki , Tezuka Fumitake , Yamashita Kazuta , Takata Yoichiro , Katoh Shinsuke , Sairyo Koichi

    … Methods : In study 1, the spinal angle, spinal motion angle, and distribution of load were measured in 8 adult male volunteers when the orthosis was worn (1) with no custom-made stay (CMS), (2) with a CMS in the prone position (P-CMS), and (3) with a CMS in the prone position and decreased lordosis (DP-CMS). … When the trunk was bent forward, loads on the back support in P-CMS and DP-CMS were concentrated at the center of the CMS, unlike those for No-CMS. …

    The Journal of Medical Investigation 66(3.4), 275-279, 2019

    IR  J-STAGE  Ichushi Web 

  • Pressure biofeedback unit to assess and train lumbopelvic stability in supine individuals with chronic low back pain

    Crasto Carlos Filipe Barbosa , Montes António Mesquita , Carvalho Paulo , Carral José Maria Cancela

    … [Participants and Methods] Eighteen volunteers with chronic nonspecific low back pain (21.28 ± 1.41 years old) who performed an active straight leg raising (dynamic postural challenge) with and without pressure biofeedback. …

    Journal of Physical Therapy Science 31(10), 755-759, 2019

    J-STAGE  Ichushi Web 

  • Flight Characteristics of Insects  [in Japanese]

    KOSAKA Takumi , SHIMIZU Takahiro , SATO Hirotaka , UMEZU Shinjiro

    … On the other hand, although MAV are small-sized, its inertia is low due to its small self-weight, and it tends to be uncontrollable due to gusts and turbulence of the air flow. … In addition, since the output is small, the maximum load capacity during flight is small, and the energy capacity of the mounted battery cannot be increased, and furthermore, since the power consumption is large, the drivable time is very short. …

    NIHON GAZO GAKKAISHI (Journal of the Imaging Society of Japan) 58(4), 441-446, 2019


  • Increased Energy Absorption into W due to the Metal Deposited Layer from an ELM-like Pulsed Plasma

    NAKAMORI Takaya , OHNO Noriyasu , TANAKA Hirohiko , KAJITA Shin , KIKUCHI Yusuke , AKIYAMA Tsuyoshi

    … <p>It is important in divertor physics research to investigate thermal response process of beryllium deposited tungsten to high transient heat load such as ELMs. … We investigated the heat load on aluminum-coated tungsten by comparing the measured back surface temperature and calculation results of the one-dimensional heat conduction equation. …

    Plasma and Fusion Research 14(0), 1401051-1401051, 2019


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