Temat: biomechanics - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Problems related to mechanics in the design of external osteosynthesis
Wybrane zagadnienia mechaniki w projektowaniu ortopedycznych stabilizatorów zewnętrznych
Autorzy:: Jasińska-Choromańska, D. E.
Tematy:: biomechanics
modelling
osteosynthesis; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/280043.pdf Link otwiera się w nowym oknie
Opis:: The external osteosynthesis is one of the methods of healing bone fractures. The idea of external fixators design consists in inserting into the bone fragments elements, which are coupled outside the limb by an element, called the frame of the fixator, having the fracture set. The external fixation is based on the principle of "load transfer". The design of a new generation of external fixators ought to employ some methods of mechanical analysis. Selected problems related to the modelling and simulation of physical performance of the unilateral external mechatronic orthopaedic fixator-bone system are presented. The majority of works makes use of the rigid finite element method for analysing the rthopaedic devicebone system. The paper presents some problems regarding mechanics applied in the external osteosynthesis design.
Stabilizacja zewnętrzna jest jedną z metod leczenia złamanych kończyn. Konstrukcja stabilizatorów zewnętrznych składa się z ramy nośnej umieszczonej po zewnętrznej stronie złamanej kończyny oraz wkrętów kostnych zamocowanych w odłamach złamanej kończyny i zablokowanych jednocześnie w ramie nośnej. Ideą konstrukcji stabilizatorów zewnętrznych jest "przenoszenie obciążenia" podczas procesu zrostu złamanych odłamów kostnych przez ramę nośną, a tym samym odciążenie szczeliny zrostu kostnego. W projektowaniu stabilizatorów nowej generacji wykorzystywane są wybrane zagadnienia mechaniki, które umożliwiają analizę układów biomechanicznych, takich jakim w prezentowanym artykule jest system stabilizator zewnętrzny-odłam kostny. Artykuł prezentuje zastosowanie wybranych zagadnień mechaniki w projektowaniu ortopedycznych stabilizatorów zewnętrznych nowej generacji.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analiza biomechaniki kręgosłupa w jeździectwie
The analysis of spine biomechanics in equine sports in use of progressive measure technologies
Autorzy:: Szypielewicz, S.
Andryszczyk, M.
Siemianowski, P.
Topoliński, T.
Tematy:: biomechanika sportu
biomechanika kręgosłupa
sEMG
jeździectwo
sport biomechanics
spine biomechanics
equestrian sport; Pokaż więcej
Wydawca:: Politechnika Śląska. Katedra Biomechatroniki
Powiązania:: https://bibliotekanauki.pl/articles/99037.pdf Link otwiera się w nowym oknie
Opis:: Niniejsza praca przedstawia możliwości analizy motoryki jeźdźca podczas jazdy konnej oraz doskonalenia treningu jeździeckiego poprzez wykorzystanie pomiarów zmian kątów kręgosłupa oraz potencjałów elektrycznych mięśni pleców jeźdźca.
The following research shows the possibilities of motorics analysis of horse-rider in equine sports and improvement of equine training throughout using the progressive measure technologies. Researches includes EMG potential measures of back muscles and measures of angle changes between spine segments.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Dynamic behavior of bone-implant substitute systems. Numerical and experimental study
Dynamika układów zastępczych połączenia kość-implant. Badania numeryczne i eksperymentalne
Autorzy:: Nowak, B.
Kaczmarek, M.
Kubik, J.
Tematy:: dynamics
biomechanics
bone
implant; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/279424.pdf Link otwiera się w nowym oknie
Opis:: In this paper, a study of substitute systems of an implanted bone was presented from the point of view of elaboration of a method for dia- gnosing the state of integrity of the bone-implant attachment based on vibrational techniques. Dynamic parameters of the systems were esha- blished as sets of eigenfrequencies/resonance frequencies using numerical procedures and experimental modal analysis. The shifts of values of the parameters were discussed in relation to the loosening of contact between the bone and implant. The numerical and experimental results were compared and their consequences for application of vibrational techniques to real anatomical systems discussed.
W pracy przedstawiono badania układów zastępczych zaimplantowanej kości udowej, które dotyczą rozwijania nowych metod diagnostycznych opartych na technikach drganiowych. Wyznaczono zbiory parametrów dynamicznych układów w postaci częstotliwości własnych i rezonansowych dla badań numerycznych i eksperymentalnych. Zmiany parametrów dynamicznych przedyskutowane zostały w kontekście odspajania implantu od kości. Porównano także wyniki badań numerycznych i eksperymentalnych oraz przeanalizowano możliwości zastosowania tej metody w układach anatomicznych.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Differences in Limb and Joint Stiffness during the Fencing Lunge
Autorzy:: Sinclair, Jonthan
Bottoms, Lindsay
Tematy:: biomechanics
fencing
limb stiffness; Pokaż więcej
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Powiązania:: https://bibliotekanauki.pl/articles/1054734.pdf Link otwiera się w nowym oknie
Opis:: The aim of the current investigation was to examine gender differences in limb and joint stiffness characteristics during the fencing lunge. Ten male and ten female fencers completed simulated lunge movements. Lower limb kinematics were collected using an eight camera optoelectric motion capture system which operated at 250 Hz. Measures of limb and joint stiffness were calculated as a function of limb length and joint moments divided by the extent of limb and joint excursion. Gender differences in limb joint stiffness parameters were examined statistically using independent samples t-tests. The results showed firstly that both limb (male = 64.22 ±19.12, female = 75.09 ±22.15 N.kg.m) and hip stiffness (male = 10.50 ±6.00, female = 25.89 ±15.01 Nm.kg.rad) were significantly greater in female fencers. In addition it was also demonstrated that knee moment (male = 1.64 ±0.23, female = 2.00 ±0.75 Nm.kg) was significantly larger in females. On the basis of these observations, the findings from the current investigation may provide further insight into the aetiology of the distinct injury patterns observed between genders in relation to fencing.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Biomechanical Assessment of Three Rebar Tying Techniques
Autorzy:: Albers, J. T.
Hudock, S. D.
Tematy:: construction
biomechanics
reinforcing ironwork; Pokaż więcej
Wydawca:: Centralny Instytut Ochrony Pracy
Powiązania:: https://bibliotekanauki.pl/articles/90340.pdf Link otwiera się w nowym oknie
Opis:: The National Institute for Occupational Safety and Health (NIOSH) conducted a study of ironworkers to evaluate their risk for developing back and hand injuries from hand-tying reinforcing steel bar and to investigate whether power tying tools can be an effective intervention for the prevention of work-related musculoskeletal disorders. A field investigation of biomechanical loading when using 3 techniques to tie together rebar was conducted. Researchers measured employees’ wrist and forearm movement with goniometers and videotaped and analyzed trunk postures. Manually tying rebar at ground level involved sustained deep trunk bending and rapid, repetitive, and forceful hand–wrist and forearm movements. Using a power tier significantly reduced the hand–wrist and forearm movements and allowed the ironworkers to use one free hand to support their trunk posture while tying. Adding an extension handle to the power tier allowed the ironworkers to tie rebar while standing erect, minimizing sustained trunk flexion.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Significance of Preventive Behaviour in the Context of a Correct Body Posture in Violin Students
Autorzy:: Kruszyńska-Szwedo, Joanna
Miller-Banaś, Anna
Guzik-Kopyto, Agata
Michnik, Robert
Tematy:: musical education
violin
biomechanics; Pokaż więcej
Wydawca:: Wydawnictwo Adam Marszałek
Powiązania:: https://bibliotekanauki.pl/articles/29520740.pdf Link otwiera się w nowym oknie
Opis:: One of the important elements of musical education is correct body posture and the ability to properlay use the motor organ to play. This work presented the possibility of applying biomechanical tests to support and enhance the education of playing instruments. The results showed that it is possible to perform such an assessment based on measurements of the body’s centre mass (COM) and loads exerted on the feet. The measurement data collected in this way enables quantitative evaluation of the body posture and the COM movement during the playing activity.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: What can normal gait biomechanics teach a designer of lower limb prostheses
Autorzy:: Pitkin, M.
Tematy:: biomechanics
prosthetics
anthropomorphicity
biomechanika
protetyka; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/306996.pdf Link otwiera się w nowym oknie
Opis:: Compensating a limb loss with prosthesis is a challenging task due to complexity of the human body which cannot be fully matched by the available technical means. Designer of lower limb prostheses wants to know what specification of the device could provide the best approximation to the normal locomotion. Deep understanding of the latter is essential, and gait analysis may be a valuable tool for this. Once prosthesis is built, gait analysis may help in comparing the wearer’s performance with the new device and with the prior art, and in verification of the hypotheses being put forward during the development process. In this lecture, we will discuss some synergies of normal gait. We will focus on the required biomechanical properties of a prosthetic leg that can allow the prosthesis’s inclusion in normal gait synergy without demanding excessive compensatory movements. We will consider contribution of leg joints to generation of propulsion for adequate design of lower limb prostheses especially those with power supply.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Finite element method in car compatibility phenomena
Autorzy:: Lisiecki, M.
Tematy:: compatibility
crash
biomechanics
simulation
transport; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/246189.pdf Link otwiera się w nowym oknie
Opis:: The main aim of the study is the side impact of the truck into the passenger car, which is one of the possible variants in compatibility case. The compatibility problem has direct influence at biomechanical injuries of the passengers travelling by the cars and also at deformation of the structure. This research should assign critical configurations of the truck and the car during side impact. Critical criteria of compatibility problem are biomechanical injuries structure deformation. The research was performed with Chrysler Neon mode, automotive seating (metal construction), Hybrid III dummy model and moving barrier with changed mass (equals to the mass of the heavy truck KAMAZ) and equipped with front underrun protection barrier (FUP - based on the geometry of the Mercedes ACTROS front structure). Interaction between car and heavy truck is at the driver side. During the research different location and angles of the barrier against the car has been taken into account. Two speeds were used to investigate the barrier influence to the car. The results of the simulation allow predicting the biomechanical coefficients such as: HIC, 3 ms, TTI, e.g., which give the overview of the passenger injuries. The other set of the data is plastic deformations which are visible at the Front Underrun Protection (FUP) barrier and also at the passenger car construction. The results of research allows to assign the direction ofthe changes which should be proposed to the truck manufactures in order to reduce passengers biomechanical injuries and intrusion into car during side impact.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Modelling muscle force distributions during the front and back squat in trained lifters
Autorzy:: Sinclair, Jonathan
Atkins, Stephen
Hayley, Vincent
Richards, James D.
Tematy:: Biomechanics
resistance training
weight lifting; Pokaż więcej
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Powiązania:: https://bibliotekanauki.pl/articles/1054989.pdf Link otwiera się w nowym oknie
Opis:: The barbell squat is a fundamental strength and conditioning exercise, with two principal variants; back and front. Whilst previous studies have examined the mechanical differences of the front and back squat, there is no information comparing the distributions of muscle forces between these variants. This study aimed to compare estimated forces developed by the primary skeletal muscles used in the front and back squat. Twenty-five male participants were recruited with 6.24 ±2.21 years of experience in squat lifting and 1 repetition maximum values of 127.5 ±18.8 and 90.6 ±14.4 kg for the back and front squat lifts. Participants completed both back and front squats at 70% of their front squat 1 repetition maximum. Muscle forces were determined during dynamic situations using motion capture data, in addition to sagittal plane kinematics. Differences between squat conditions were examined using a multivariate analysis of variance. The kinematic analysis showed that the back squat was associated with significantly (p < 0.05) greater flexion of the trunk. Examination of muscles forces indicated that erector spinae forces were also significantly (p < 0.05) larger in the back squat. No significant differences were identified for skeletal muscle forces elsewhere (p > 0.05). Our results indicate that neither the front nor back squat provides any marked difference in muscle force production, aside from that isolated to the lower back. These findings lead the conclusion that neither the front nor back squat conditions confer any additional benefits over the other in terms of the skeletal muscle force output.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Shell models of the artery wall
Autorzy:: Kalita, Piotr
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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