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Wyszukujesz frazę "Motion" wg kryterium: Temat


Tytuł:
Real time motion compensation technology based on least square support vector machine prediction
Autorzy:
Song, Zhehan
Feng, Huajun
Xu, Zhihai
Li, Qi
Powiązania:
https://bibliotekanauki.pl/articles/2086762.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
motion compensation
motion prediction
dual-resolution camera system
least square support vector machine
Opis:
When cameras are used in aerial photography, satellite imaging or other scenes, the motion of the observational target causes image blur. The corresponding motion compensation systems often present some response delay. Thus, we introduce effective and fast motion prediction for the target to achieve steady real-time motion compensation. We first analyze the target motion states to propose a fast and robust prediction method based on the least square support vector machine algorithm. Then, we evaluate the performance between ours and other state-of-the-art methods through experiments. Experimental results confirm that the proposed method provides a fast and robust prediction for target motion. At last, we embed our method with dual-resolution camera system to perform high-quality motion compensation effect in real time.
Źródło:
Optica Applicata; 2022, 52, 2; 259--272
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kształtowanie struktury architektonicznej elementami ruchu na przykładzie Atheneum w New Harmony (Indiana, USA)
Shaping the architectural structure of elements of motion on the example of Atheneum in New Harmony (Indiana State, USA)
Autorzy:
Szparkowski, Zygmunt
Powiązania:
https://bibliotekanauki.pl/articles/905194.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
obraz ruchu
architektura
element ruchu
struktura
proces kształtowania
motion image
architecture
motion element
structure
shaping process
Opis:
Tematem artykułu jest kształtowanie struktury architektonicznej przez elementy ruchu, które wchodzą w jej skład. Celem jest opisanie ważnego aspektu kształtowania architektury, który w wielu rozwiązaniach projektowych odgrywa zasadniczą rolę. Ruch bowiem obrazuje poruszanie się i miejsce człowieka w przestrzeni architektonicznej. Uwidacznia związki poszczególnych przestrzeni funkcjonalnych, niejednokrotnie odlegle usytuowanych. Bez uwzględnienia tych związków architektura stałaby się zbiorem przypadkowych elementów, chaotyczna i pozbawiona sensu. Zwykle projektowanie architektoniczne zaczyna się od sporządzania diagramów ruchu czy tabel wzajemnych przybliżeń. Artykuł ma zatem na celu kreowanie pewnej wyobraźni przestrzennej, która w połączeniu ze wstępnymi szkicami powiązań i przybliżeń funkcjonalnych pozwala na tworzenie własnej koncepcji przestrzeni. W pierwszej części artykułu posłużono się metodą konstrukcyjną, dokonując przeglądu oraz analiz wybranych elementów ruchu. Przedstawiono je w formie zrozumiałych diagramów graficznych, z krótkim uzasadnieniem tekstowym. W części drugiej posłużono się metodą porównawczą. Dokonano porównania elementów ruchu z części pierwszej opracowania i ich odniesienie do realizacji New Harmony Richarda Meiera. Obiekt ten został wybrany ze względu na jej autora – znanego projektanta i teoretyka architektury. Co więcej, jak to podkreślono w opracowaniu, wymienione elementy stanowią podstawową kanwę kształtowania przykładowej struktury architektonicznej. Elementy obrazujące ruch przyjmują zwykle określone formy, które w procesie kształtowania struktury architektonicznej zachowują swoją konkretną funkcję i tożsamość. Informacja w nich zawarta, ich forma geometryczna i ergonomiczna powinna odpowiadać człowiekowi. Kształt jest zwykle logiczny i wynika z podstawowych elementów geometrii. Należy zaznaczyć, że omówione w artykule zasady nie są powszechnie stosowane zarówno w nauczaniu architektury, jak i w realiach architektonicznych.
The theme of the article is the shaping of the architectural structure by the elements of motion that form part of it. The aim is to describe an important aspect of architecture shaping, which plays an essential role in many design solutions. Motion depicts the way man moves and exists in the architectural space. It reveals the links of individual functional spaces, often remotely located. Without taking these links into account, architecture would become a collection of random elements, it would be chaotic and meaningless. Typically, architectural design begins with drawing up motion diagrams or tables of mutual approximation. The article is therefore intended to create a certain spatial imagination, which, in combination with preliminary sketches of functional links and approximations, allows you to create your own concept of space. The first part of the article used the construction method to review and analyze the selected motion elements. They are presented in the form of comprehensible graphic diagrams, with a brief textual justification. In part two, a comparative method is used. The elements of motion from part one of the study were compared and referenced to Richard Meier’s New Harmony. This architectural object was chosen because of the well-known designer and theorist of architecture. Moreover, as highlighted in the study, these elements are the basis for shaping the exemplary architectural structure. Elements depicting motion usually take certain forms, which in the process of shaping the architectural structure retain their specific functions and identity. The information contained thereof, their geometric and ergonomic form should correspond to man. The shape is usually logical and is based on the fundamental elements of geometry. It should be noted that the principles discussed in the article are not widely used in the teaching of architecture and in architectural reality either.
Źródło:
Architectus; 2020, 3 (63); 69-82
1429-7507
2084-5227
Pojawia się w:
Architectus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The relationship between trunk and pelvis kinematics during pregnancy trimesters
Autorzy:
Eldeeb, A. M.
Hamada, H. A.
Abdel-Aziem, A. A.
Youssef, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/306926.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ciąża
miednica
analiza ruchu
pregnancy
pelvis
motion analysis
trunk
Opis:
Purpose: Pregnancy is characterized by many musculoskeletal changes that affect daily living activities and walking. The purpose of this study was to examine the effect of pregnancy on pelvic and trunk kinematics, and their relationship during the three pregnancy trimesters. Methods: Three-dimensional pelvis and trunk motions were measured using Qualisys Gait Analysis System in the first, second and third trimesters of pregnancy. The maximum anterior pelvic tilt and maximum trunk flexion during stance phase, pelvic tilt, obliquity and rotation, as well as trunk flexion-extension, lateral bending and rotation were measured. Results: Repeated-measures analysis of variance showed a significant increase in the maximum anterior pelvic tilt during stance phase (p=0.005), and a significant decrease in the pelvic obliquity (p=0.011), maximum trunk flexion during stance phase (p=0.0006), trunk lateral bending (p=0.005) and trunk rotation (p=0.004). A significant negative correlation was found between maximum anterior pelvic tilt and maximum trunk flexion in the first (r=-0.72, p=0.008), second (r=-0.61, p=0.03), and third (r=-0.61,p=0.03) trimesters of pregnancy. Also, there was a significant positive correlation found between pelvic obliquity and trunk lateral bending in the first (r=0.76, p=0.04), second (r=0.59, p=0.04), and third (r=0.59, p=0.04) trimesters of pregnancy. Conclusions: The pregnant women walk with an increased maximum anterior pelvic tilt, a decreased maximum trunk flexion, a decreased pelvic obliquity, as well as a decreased trunk lateral bending and rotation. Pregnancy does not affect the relationship between pelvis and trunk motions.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 4; 79-85
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spinal range of motion and plantar pressure in sport climbers
Autorzy:
Hawrylak, A.
Chromik, K.
Ratajczak, B.
Barczyk-Pawelec, K.
Demczuk-Włodarczyk, E.
Powiązania:
https://bibliotekanauki.pl/articles/306597.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
wspinaczka
ruch
stopy
sport climbing
spinal range of motion
feet
Opis:
Purpose: The aim of the study was to investigate the range of motion (ROM) of lumbar and thoracic articulations and static and dynamic plantar pressure in sport climbing athletes. Methods: The sample included 30 sport climbers with a minimum of 2 years training experience and 30 physical education students who served as an active untrained control. ROM was assessed by a Saunders digital inclinometer; plantar pressure by a baropodometric platform. Results: Mean spinal ROMs were greater in the sport climbers with the exception of extension, rotation, and lateral thoracic flexion, with a high degree of statistical significance obtained in the majority of the analyzed ROMs. The climbers exhibited increased mean forefoot pressure (smaller rearfoot pressure) in both the dominant and non-dominant extremities, with significant intergroup differences found in dominant forefoot/rearfoot pressure distribution. Conclusions: Sport climbers present increased lumbar and thoracic ROM, and the characteristics of climbing may also affect transverse arch structure and plantar pressure distribution.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 2; 169-173
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostic value of the hamstring to quadriceps ratio in monitoring of the effectiveness of supervised 6-month physiotherapy in males after Anterior Cruciate Ligament Reconstruction (ACLR)
Autorzy:
Krzemińska, Katarzyna
Czamara, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/27324084.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
prevention
isokinetic
symmetry index
motion
isometry
zapobieganie
izokinetyczny
wskaźnik symetrii
ruch
izometria
Opis:
The aim of the study was to assess the usefulness of isometric torque (IT) and peak torque (PT) of the hamstring to quadriceps muscles ratio (H/Q ratio) in monitoring the effectiveness of physiotherapy (PH) in males after ACLR. Hypothesis: The H/Q ratio is a diagnostic tool for monitoring of the effectiveness of the 6- month PH after ACLR. Methods: Twenty males 6 months after ACLR (ACLR group) and 20 male controls underwent IT and PT (60°/s and 180°/s) bilateral measurements of H and Q muscles. The IT and PT were normalized to body mass, and expressed as relative IT (RIT) and relative PT (RPT). The RIT and RPT H/Q ratios, and Limb Symmetry Index (LSI) were calculated. Results: In the ACLR group, the RIT for the H and Q, the RIT for the H/Q ratio and most of the RPT, as well as the H/Q ratio, ROM and LSI values of the operated knee, were not significantly different (NSD) than those of the non-operated side (NOS) or the control group. The between-group comparison of the H/Q ratio for RIT and RPT weren’t NSD. The isokinetic test at 180 °/s showed lower RPT, H/Q ratio and LSI values for the Q muscle than those of the NOS (p = 0.042, p = 0.001). Conclusions: The H/Q ratio, in combination with the RIT, RPT and LSI, is a useful diagnostic tool for monitoring the effectiveness of 6-month PH after ACLR. Restoring the correct H/Q ratio can reduce the risk factor for ACL graft rupture.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 4; 31--39
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of reliability and concurrent validity of of two optoelectric systems used for recording maximum vertical jumping performance versus the gold standard
Autorzy:
Słomka, K. J.
Sobota, G.
Skowronek, T.
Rzepko, M.
Czarny, W.
Juras, G.
Powiązania:
https://bibliotekanauki.pl/articles/307083.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
niezawodność
sport
skoki
reliability
counter movement jump
motion capture
sports performance
optoelectric
Opis:
The objective of this study was to evaluate the reliability and validity of two alternative systems used for jumping performance measurement. Methods: Two groups of subjects were tested. The first group consisted of 15 male adults (21.3 ± 1.7 years ) and the second group consisted of 16 female volleyball players (17.2 ± 0.9 years). We used three different systems of data collection in the study. Two of the used systems are based on optoelectric components. The Optojump Next system is referred to as the optoelectric system, and BTS Smart-E is refered to as the video system. Concurrent validity of these systems was verified with the use of “gold standard” which is force platform. All systems were used to estimate the height of vertical jumps. Results: Both optoelectric systems occurred to be highly reliable with the ICCs=0.98 for Optojump and 0.9 for BTS Smart. Their concurrent validity with the force platform data was also very high r=0.99 and r=0.97 respectively. Conclusions: Comparison of these two systems shows distinct differences between them where Optojump system is more suitable for quick and reliable sports testing, when BTS-Smart for research and clinical testing.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 2; 141-147
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Upper Limb Motion Deviation Index: A new comprehensive index of upper limb motion pathology
Autorzy:
Jurkojć, J.
Wodarski, P.
Michnik, R.
Nowakowska, K.
Bieniek, A.
Gzik, M.
Powiązania:
https://bibliotekanauki.pl/articles/306397.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
patologia
narząd ruchu
ULMDI
indeksacja
upper limb motion pathology
gait deviation index
Opis:
The aim of the research was to formulate a new index enabling assessment of the overall pathology of the upper limb movement. It defines the difference between the pathological movement and a normal movement pattern. Methods: Methodology of determining the index is based on a mathematical algorithm for calculating the Gait Deviation Index which is based on advanced methods of image comparison. To calculate the ULMDI index, one must divide the analyzed movement into cycles appropriate to the nature of the movement (similarly in gait it is the gait cycle) and then determine kinematic quantities (courses of joint angles). Results: A group of 23 healthy people (10 women: k1-k10 and 13 men: m1-m13) as the reference group and a group of 3 persons with mobility impairments (p1-p3) took part in the research. Time values of the angles of the joints on both upper limbs were registered and then ULMDI indexes were calculated. Conclusions: It has been shown that the developed ULMDI index allows to detect the deviations from the accepted norm in the performance of movements. The results showed that both the description of the motor dysfunction of examined person based on the diagnosis of the physician, a detailed analysis of kinematic waveforms received during the tests and the calculated values provide a coherent picture of the state of a human movement. The index analysis is less time-consuming for the doctor, and the comparison of the results at various stages of therapy gives an objective picture of the rehabilitation progress.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 2; 175-185
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Attaching mass to the upper arm can increase throw distance in a modified javelin throw
Autorzy:
Linthorne, Nicholas
Heys, Martin
Reynolds, Tomas
Eckardt, Nils
Powiązania:
https://bibliotekanauki.pl/articles/27324148.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biomechanics
motion analysis
sport performance
throwing
biomechanika
analiza ruchu
wyniki sportowe
rzucanie
Opis:
The effectiveness of the whip-like coordination in throwing might be influenced by the inertial properties of the athlete’s arm. This preliminary study investigated the acute effect of attaching mass to the upper arm on the distance achieved in a modified javelin throw. The aim was to identify the optimum upper arm mass that maximizes throw distance. Methods: Three well-trained adult male athletes performed maximum-effort throws with an 800-g javelin training ball. A wide range of masses (0–1.5 kg) were attached to the upper arm and a 2D video analysis was used to obtain measures of the projection variables for each attached mass. Results: All three athletes showed an effect of attached arm mass on throw distance, and with the optimum mass the athlete’s throw distance was increased by 2.2 m, 1.2 m, and 0 m (7%, 4%, and 0%), respectively. The optimum mass was specific to the athlete (0.6 kg, 0.2 kg, and 0 kg) and changes in throw distance were mostly due to changes in release velocity rather than changes in release angle or release height. The experimental results were broadly similar to those obtained using a simple 2D mathematical model of throwing. Conclusions: These results indicate that some javelin throwers might see an increase in throwing performance when a mass is attached to their upper arm. However, the relationship between upper arm mass and throwing performance should be investigated further with studies on more athletes, projectiles of different mass, and other throwing events.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 2; 55--67
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accelerometer profile of motion of the pelvic girdle in butterfly swimming
Autorzy:
Staniak, Z.
Buśko, K.
Górski, M.
Pastuszak, A.
Powiązania:
https://bibliotekanauki.pl/articles/306410.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
pływanie
przyspieszenie
prędkość
swimming
butterfly swimming
acceleration
velocity
profile of pelvic girdle motion
Opis:
Purpose: The aim of the study was to develop a method to measure and analyse kinematics of movement of the pelvic girdle in butterfly swimming in order to support training of technical skills. Methods: A device for recording triaxial accelerations and triaxial rotational angular velocities was mounted on the dorsal part of the pelvic girdle of athlete. The measurements were performed in ten elite butterfly swimmers (age: 23.1 ± 3.7 years, body height: 187.6 ± 4.3 cm, body mass 83.4 ± 6.33 kg). The task of the athlete was to swim one length of short course pool at maximal intensity. Individual mean graphical and numerical profiles of the kinematics of the movement of the pelvic girdle was computed, within the average cycle based on five consecutive cycles. Results: Statistical analysis of numerical individual parameters of profiles of the athletes studied revealed statistically significant differences between the swimmers. Statistically significant correlations were also found between personal best times in 50 m swimming (r = –0.76, p < 0.05) and 100 m swimming (r = –0.76, p < 0.05) and duration of the part of the cycle connected with the decline in velocity from maximum translational motion velocity obtained during propulsion with the upper and lower limbs to minimum value of the velocity obtained before the beginning of propulsion only with the lower limbs. Conclusion: The proposed measurement method, presentation and analysis of the profile of the pelvic girdle motion in butterfly swimming represents a good tool for fast and effective qualitative and quantitative biomechanical evaluation of movement technique components.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 1; 159-167
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of functional methods for human movement modelling
Autorzy:
Gastaldi, L.
Lisco, G.
Pastarelli, S.
Powiązania:
https://bibliotekanauki.pl/articles/307058.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
analiza funkcjonalna
analiza ruchu
modelowanie
kinematyka
functional analysis
motion analysis
human modelling
joint kinematics
Opis:
Purpose: accurate assessment of human joint parameters is a critical issue for the quantitative movement analysis, due to a direct influence on motion patterns. In this study three different known functional methods are experimentally compared to identify knee joint kinematics for further gait and motion analysis purposes. Methods: taking into account the human knee physiology complexity, within its roto-translation, the study is conducted on a lower limb mechanical analogue with a polycentric hinge-based kinematic model. The device mimics a joint with a mobile axis of rotation whose position is definable. Sets of reflective markers are placed on the dummy and flexion-extension movements are imposed to the shank segment. Marker positions are acquired using an optoelectronic motion capture system (Vicon 512). Results: acquired markers’ positions are used as input data to the three functional methods considered. These ones approximate the polycentric knee joint with a fixed single axis model. Different ranges of motion and number of markers are considered for each functional method. Results are presented through the evaluation of accuracy and precision concerning both misalignment and distance errors between the estimated axis of rotation and the instantaneous polycentric one, used as reference. Conclusion: the study shows the feasibility of the identification of joint parameters with functional approaches applied on a polycentric mechanism, differently from those usually conceived by the reviewed algorithms. Moreover, it quantifies and compares the approximation errors using different algorithms, by varying number and position of markers, as well ranges of motion.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 4; 31-38
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Standard Deviation of Differential Index as an innovation diagnostic tool based on kinematic parameters for objective assessment of a upper limb motion pathology
Autorzy:
Jurkojč, J.
Wodarski, P.
Michnik, R. A.
Bieniek, A.
Gzik, M.
Granek, A.
Powiązania:
https://bibliotekanauki.pl/articles/306421.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
indeksacja
patologia
SDDI
parametry kinematyczne
upper extremities
upper limb motion pathology
indexes
pathology
PULMI
Opis:
Indexing methods are very popular in terms of determining the degree of disability associated with motor dysfunctions. Currently, indexing methods dedicated to the upper limbs are not very popular, probably due to difficulties in their interpretation. This work presents the calculation algorithm of new SDDI index and the attempt is made to determine the level of physical dysfunction along with description of its kind, based on the interpretation of the calculation results of SDDI and PULMI indices. Methods: 23 healthy people (10 women and 13 men), which constituted a reference group, and a group of 3 people with mobility impairments participated in the tests. In order to examine possibilities of the utilization of the SDDI index the participants had to repetitively perform two selected rehabilitation movements of upper extremities. During the tests the kinematic value was registered using inertial motion analysis system MVN BIOMECH. Results: The results of the test were collected in waveforms of 9 anatomical angles in 4 joints of upper extremities. Then, SDDI and PULMI indices were calculated for each person with mobility impairments. Next, the analysis was performed to check which abnormalities in upper extremity motion can influence the value of both indexes and interpretation of those indexes was shown. Conclusion: Joint analysis of the both indices provides information on whether the patient has correctly performed the set sequence of movement and enables the determination of possible irregularities in the performance of movement given.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 4; 77-87
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alteration of the multi-segment foot motion during gait in individuals with plantar fasciitis: a matched case-control study
Autorzy:
Bovonsunthonchai, Sunee
Thong-On, Suthasinee
Vachalathiti, Roongtiwa
Intiravoranont, Warinda
Suwannarat, Sarawut
Smith, Richard
Powiązania:
https://bibliotekanauki.pl/articles/306336.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
chód
wielosegmentowy ruch stopy
zapalenie powięzi podeszwy
gait
multi-segment foot motion
plantar fasciitis
Opis:
The objective of this study was to compare the ground reaction forces (GRFs) and the multi-segment foot motion between individuals with plantar fasciitis (PF) and healthy controls. Methods: Twenty-one individuals with PF and 21 matched-case healthy controls who passed the criteria participated in the study. Gait data were assessed during their self-selected comfortable speeds by the 3D motion analysis system. The multi-segment foot motions were determined by the Oxford Foot Model. Outcome measures included the vertical and antero-posterior ground reaction forces (GRFs) and the multi-segment foot motions [the dorsiflexion (DF), plantarflexion (PF), inversion (Inv), eversion (Eve), adduction (Add), and abduction (Abd) peak angles for the forefoot with respect to hindfoot (FFHF) and the DF, PF, Inv, Eve, internal rotation (IR), and external rotation (ER) peak angles for the hindfoot with respect to tibia (HFTB) as well as their ranges (R)]. Results: Comparisons between individuals with PF and healthy controls showed no significant differences in any of the GRFs. Significant reductions were found in the FFHF-DF, FFHF-DF-R, FFHF-Inv, and HFTB-Inv/Eve-R in individuals with PF. In addition, there were tendencies of the increased angles of the FFHF-PF, HFTB-DF, HFTB-Inv, and HFTB-ER, but not significantly for individuals with PF, compared to healthy controls. Conclusions: Adaptations of the intra-foot motion showed the reduction of some angles but no change for the GRFs in individuals with PF compared to the healthy controls when both groups walked at a similar gait speed.
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 4; 73-82
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetyczna morfogeneza: generatywny system rozwoju strukturalnego w oparciu o interaktywne przechwytywanie ruchu
Kinetic morphogenesis: generative system of structural expansion based on interactive motion capture
Autorzy:
Nisztuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/293705.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
przechwytywanie ruchu
projektowanie generatywne
interaktywność
rozwój strukturalny
motion capture
generative design
interactivity
structural expansion
Opis:
Niniejszy artykuł przedstawia zasady i cele projektu Kinetyczna morfogeneza starającego się opisać ruch człowieka poprzez interaktywny system przechwytywania ruchu i tworzonej generatywnie geometrii na podstawie rzeczywistego kontekstu przestrzennego. Artykuł opisuje proces opracowania wytycznych dotyczących aplikacji, prezentuje efekty działania pierwszego prototypu, a także wskazuje kierunki dalszych prac badawczych. Celem opracowania jest odnalezienie i opisanie piękna form biologicznych powstających w oparciu o ruch człowieka. Najważniejszym aspektem badań jest czysta eksploracja formy oraz zacierającej się granicy między realnym, materialnym światem a przestrzenią wirtualną. Głównym zakładanym rezultatem projektu jest znalezienie różnorodnych możliwości generatywnej wizualizacji procesów w czasie rzeczywistym poprzez narzędzia interaktywne. Przeprowadzone badania oraz analiza rezultatów doprowadziła do lepszego zrozumienia relacji przestrzennych między ludzkim ciałem a rzeczywistym/wirtualnym kontekstem przestrzennym i odnalezienia nowych możliwości interakcji między środowiskiem generatywnym (proces cyfrowy, w którym obiekt generatywny ma szansę zaistnieć; stanowi zbiór zasad, skryptów, algorytmów określonych przez projektanta; zawiera w sobie również moduł ewaluacji, pozwalający oceniać wartość estetyczną danego obiektu generatywnego przez projektanta) a kontekstem fizycznym.
The article outlines the principles and goals of the research project Kinetic morphogenesis trying to describe human movement through interactive motion capture and generative geometry based on real spatial context. In addition, the article describes the process of design guidelines development, demonstrates the effects of the first prototype, and outlines the direction of further research related to the project. The aim is to find the beauty in biological forms which arise based on human movement. The research here is about pure form finding and blurring the boundary between real, material world and virtual space. The main assumed outcome is the exploration of various possibilities of generative process visualization in real time through an interactive tool. Additional findings resulted in better understanding of spatial relations between the human body and real (or virtual) spatial context. In addition, exploration of new possibilities of interaction between generative environment (a digital process in which the generative object has a chance to occur; is a set of rules, scripts or algorithms specified by the designer. It also has a module of evaluation which allows assessing the aesthetic value of the generative object) and real context.
Źródło:
Architectus; 2017, 4 (52); 49-64
1429-7507
2084-5227
Pojawia się w:
Architectus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the reliability of a new non-invasive method for assessing the functionality and mobility of the spine
Autorzy:
Topalidou, A.
Tzagarakis, G.
Souvatzis, X.
Kontakis, G.
Katonis, P.
Powiązania:
https://bibliotekanauki.pl/articles/306560.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
intraclass correlation coefficient
intra-rater reliabilit
mobility
range of motion
spinal mouse
mobilność
ruch
kręgosłup
Opis:
For the evaluation of the functionality and mobility of the spine, several methods have been developed. The purpose of this study was to estimate the test-retest reliability of the Spinal Mouse, a new, non-invasive, computer-assisted wireless telemetry device for the assessment of the curvatures, the mobility and the functionality of the spine. Materials and methods: the test-retest reliability was evaluated in 50 adults with back or low back pain. Twenty four parameters were studied in the sagittal and frontal plane. For the characterization of the precision, the intraclass correlation coefficient and the standard error of measurement were used. Results: in the sagittal plane, 22 of the 24 parameters showed high and good reliability, while only two fair and poor. In the frontal plane, 17 parameters showed high and good reliability, five fair and two poor. Discussion: the Spinal Mouse showed excellent test-retest reliability in the sagittal plane, while a slightly inferior performance in the frontal plane, for the evaluation of curvatures, deformation and mobility of the spine.
Źródło:
Acta of Bioengineering and Biomechanics; 2014, 16, 1; 117-124
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between lower limbs kinematic variables and effectiveness of sprint during maximum velocity phase
Autorzy:
Struzik, A.
Konieczny, G.
Grzesik, K.
Stawarz, M.
Winiarski, S.
Rokita, A.
Powiązania:
https://bibliotekanauki.pl/articles/307199.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
prędkość kątowa
czujniki inercjalne
docieranie
sportowiec
angular velocity
inertial sensors
motion pattern
running
young athletes
Opis:
Purpose: The aim of the study was to determine the relationships between time of running over a 15–25 m section of a 30-meter run along a straight line and changes in the angle and angular velocity observed in ankle, knee and hip joints. Therefore, the authors attempted to answer the question of whether a technique of lower limbs movement during the phase of sprint maximum velocity significantly correlates with the time of running over this section. Methods: A group of 14 young people from the Lower Silesia Voivodeship Team participated in the experiment. A Fusion Smart Speed System was employed for running time measurements. The kinematic data were recorded using Noraxon MyoMotion system. Results: There were observed statistically significant relationships between sprint time over a section from 15 to 25 m and left hip rotation (positive) and between this time and left and right ankle joint dorsi-plantar flexion (negative). Conclusions: During the maximum velocity phase of a 30 m sprint, the effect of dorsi-plantar flexion performed in the whole range of motion was found to be beneficial. This can be attributed to the use of elastic energy released in the stride cycle. Further, hip rotation should be minimized, which makes the stride aligned more along a line of running (a straight line) instead of from side to side.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 4; 131-138
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł

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