Jitka Klugarová, Miroslav Janura, Zdeněk Svoboda, Zdenek Sos, Nicholas Stergiou, Miloslav Klugar,
The aim of our study was to compare spatiotemporal parameters and lower limb and pelvis kinematics during the walking in patients with hallux valgus before and after surgery and in relation to a control group.Seventeen females with hallux valgus, who underwent first metatarsal osteotomy, constituted our experimental group. The control group consisted of thirteen females. Kinematic data during walking were obtained using the Vicon MX system.Our results showed that hallux valgus before surgery affects ...
Tópico(s): Tendon Structure and Treatment
2016 - Elsevier BV | Clinical Biomechanics
Leonid Berezansky, Josef Diblı́k, Zdeněk Svoboda, Zdeněk Šmarda,
Uniform exponential stability of linear systems with time varying coefficientsẋi(t)=-∑j=1m∑k=1rijaijk(t)xj(hijk(t)),i=1,…,mis studied, where t⩾0,m and rij,i,j=1,…,m are natural numbers, aijk:[0,∞)→R and hijk:[0,∞)→R are measurable functions. New explicit result is derived with the proof based on Bohl–Perron theorem. The resulting criterion has advantages over some previous ones in that, e.g., it involves no M-matrix to establish stability. Several useful and easily verifiable corollaries are deduced ...
Tópico(s): Numerical methods for differential equations
2014 - Elsevier BV | Applied Mathematics and Computation
Yasir Khan, Zdeněk Svoboda, Zdeněk Šmarda,
Abstract In this paper, the differential transformation method (DTM) is applied to solve singular initial problems represented by certain classes of Lane-Emden type equations. Some new differential transformation formulas for certain exponential and logarithmic nonlinearities are derived. The approximate and exact solutions of these equations are calculated in the form of series with easily computable terms. The results obtained with the proposed methods are in good agreement with those obtained ...
Tópico(s): Numerical methods for differential equations
2012 - Springer Nature | Advances in Difference Equations
Josef Diblı́k, Zdeněk Svoboda, Zdeněk Šmarda,
The investigation of asymptotic behaviour of solutions of ordinary differential equations is often based on the application of the retract principle. Initially developed for ordinary differential equations, this technique was extended to other classes of equations. Not answered remains a problem concerning the possibility of extending this principle to neutral differential equations. The goal of the present paper is to partially fill this gap and develop a corresponding technique for the application ...
Tópico(s): Nonlinear Differential Equations Analysis
2009 - Elsevier BV | Nonlinear Analysis
Josef Diblı́k, Zdeněk Svoboda, Zdeněk Šmarda,
A scalar linear differential equation with time-dependent delay x ̇ ( t ) = − a ( t ) x ( t − τ ( t ) ) is considered, where t ∈ I ≔ [ t 0 , ∞ ) , t 0 ∈ R , a : I → R + ≔ ( 0 , ∞ ) is a continuous function and τ : I → R + is a continuous function such that t − τ ( t ) > t 0 − τ ( t 0 ) if t > t 0 . The goal of our investigation is to give sufficient conditions for the existence of positive solutions as t → ∞ in the critical case in terms of inequalities on a and τ . A generalization of one known final (in a certain sense) result is given for the case of τ being not a constant. Analysing ...
Tópico(s): Numerical methods for differential equations
2008 - Elsevier BV | Computers & Mathematics with Applications
Leonid Berezansky, Josef Diblı́k, Zdeněk Svoboda, Zdeněk Šmarda,
Uniform exponential stability of a linear delayed integro-differential vector equationx˙(t)=∑k=1mAk(t)x(hk(t))+∑k=1l∫gk(t)tPk(t,s)x(s)ds,t∈[0,∞), where x=(x1,…,xn)T is an unknown vector-function, is considered. It is assumed that m, l are positive integers, matrices Ak, Pk and delays hk, gk are Lebesgue measurable. The main result is of an explicit type, depending on all delays, and its proof is based on an a priori estimation of solutions, a Bohl-Perron type result, and utilization of the matrix ...
Tópico(s): Matrix Theory and Algorithms
2020 - Elsevier BV | Journal of Differential Equations
Petra Vychytilova‐Faltejskova, Alena Svobodová Kovaříková, Tomáš Grolich, Vladimír Procházka, Kateřina Slabá, Táňa Macháčková, Jana Halámková, Marek Svoboda, Zdeněk Kala, Igor Kišš, Ondřej Slabý,
MicroRNAs (miRNAs) are small non-coding RNAs that post-transcriptionally regulate gene expression. Each step of their production and maturation has to be strictly regulated, as any disruption of control mechanisms may lead to cancer. Thus, we have measured the expression of 19 genes involved in miRNAs biogenesis pathway in tumor tissues of 239 colorectal cancer (CRC) patients, 17 CRC patients with liver metastases and 239 adjacent tissues using real-time PCR. Subsequently, the expression of analyzed ...
Tópico(s): Circular RNAs in diseases
2019 - Multidisciplinary Digital Publishing Institute | International Journal of Molecular Sciences
Tomáš Belloň, Petr Polezhaev, Lucie Vobecká, Miloš Svoboda, Zdeněk Slouka,
Ion-exchange systems represented, for example, by ion-exchange membranes or ion-exchange resin particles exhibit nonlinear current-voltage curves on which one finds three distinct regions. These regions are referred to as underlimiting, limiting and overlimiting ones. Each of these regions reflects proceeding phenomena responsible for the ion transport. It is known that all important transport processes take place on the depletion side of the ion-exchange systems. Here, we capture the situation ...
Tópico(s): Electrochemical Analysis and Applications
2018 - Elsevier BV | Journal of Membrane Science
David Sedmidubský, Jindřich Leitner, P. Svoboda, Zdeněk Sofer, Jan Macháček,
Tópico(s): GaN-based semiconductor devices and materials
2009 - Springer Science+Business Media | Journal of Thermal Analysis and Calorimetry
Miloš Svoboda, Zdeněk Slouka, Walter Schrott, Dalimil Šnita,
We have developed an electrochemical micro-system with embedded Ralex® CM PES membrane which separates two electrolytes of the same composition and concentration. Gold sensing micro-electrodes were integrated into the micro-system. The precise control of the hydrodynamic conditions – uniform flow of the solutions, uniform electric current distribution in micro-channels, spatial resolution of the measurement (small dimensions of the electrodes) and the precise positioning of the measuring elements represent ...
Tópico(s): Membrane Separation Technologies
2009 - Elsevier BV | Microelectronic Engineering
Walter Schrott, Miloš Svoboda, Zdeněk Slouka, Michal Přibyl, Dalimil Šnita,
In this work, we have developed a novel and cheap fabrication method of microfluidic chips made of native PDMS. The method relies on traditional PDMS casting against a SU8 master, however, it essentially differs in (i) the use of phosphor bronze (PB) substrates instead of silicon wafers as "carriers" for SU8 structures and (ii) accomplishing the irreversible sealing of two PDMS layers without oxygen plasma treatment. Specially pre-treated PB substrates possess a relatively high surface roughness, which ...
Tópico(s): Microfluidic and Bio-sensing Technologies
2009 - Elsevier BV | Microelectronic Engineering
Miloš Svoboda, Zdeněk Slouka, Walter Schrott, Petr Červenka, Michal Přibyl, Dalimil Šnita,
A novel fabrication process of polymethyl methacrylate (PMMA) microfluidic chip with embedded gold microelectrodes has been developed. The PMMA chips consist of a microfluidic part, which is made by micro-milling and a mate with embedded gold electrodes made by sacrificed substrate technique. The developed sacrificed substrate technique combines photolithography, gold electrodeposition and embedding of the gold structures into a UV curable resin. Both microfluidic and electrode parts are bonded together ...
Tópico(s): Analytical Chemistry and Sensors
2009 - Elsevier BV | Microelectronic Engineering
Walter Schrott, Miloš Svoboda, Zdeněk Slouka, Dalimil Šnita,
We have developed a novel technique for fabrication of plastic microfluidic systems with integrated metal microelectrodes. This technique includes: (i) optical lithography in the ma-P1275 photoresist previously coated on a metal substrate, (ii) electroplating of gold or copper, (iii) photoresist stripping, (iv) embedding of the metal structures in the UV curable resin Acrifix 192®, (v) UV curing of the resin, (vi) removal of the metal substrate – by peeling off or etching, and (vii) thermal bonding of the ...
Tópico(s): Microfluidic and Bio-sensing Technologies
2009 - Elsevier BV | Microelectronic Engineering
Leonid Berezansky, Josef Diblı́k, Zdeněk Svoboda, Zdeněk Šmarda,
Tópico(s): Numerical methods for differential equations
2018 - Springer Science+Business Media | Journal of Dynamics and Differential Equations
Leonid Berezansky, Josef Diblı́k, Zdeněk Svoboda, Zdeněk Šmarda,
Linear delayed differential systems x˙i(t)=−∑j=1m∑k=1rijaijk(t)xj(hijk(t)),i=1,…,mare analyzed on a half-infinity interval t ≥ 0. It is assumed that m and rij, i,j=1,…,m are natural numbers and the coefficients aijk:[0,∞)→R and delays hijk:[0,∞)→R are measurable functions. New explicit results on uniform exponential stability are derived including, as partial cases, recently published results.
Tópico(s): Control and Stability of Dynamical Systems
2017 - Elsevier BV | Applied Mathematics and Computation
Ivan Němec, Radovan Herchel, Roman Boča, Ingrid Svoboda, Zdeněk Trávnı́ček, Ľubor Dlháň, Kristína Matelková, H. Fueß,
Tópico(s): Organic and Molecular Conductors Research
2010 - Elsevier BV | Inorganica Chimica Acta
Marek Pernica, Blanka Kyralová, Zdeněk Svoboda, Rastislav Boško, Iveta Brožková, Lenka Česlová, Karolína Benešová, Libor Červenka, Sylvie Běláková,
Mycotoxins have been widely studied by many research groups but further multidisciplinary research is needed to better understand and clarify many issues. This study describes the use of high-performance liquid chromatography coupled with ion trap mass spectrometry (HPLC-MS) to measure T-2 toxin and its metabolites, such as HT-2 toxin, neosolaniol (NEO) and diacetoxyscirpenol (DAS), as well as masked glucosylated mycotoxins in Fusarium-infected Czech spring barley. In total, 152 spring barley samples ...
Tópico(s): Plant and fungal interactions
2021 - Elsevier BV | Food Microbiology
Denisa Nohelová, Lucia Bizovská, Nicolas Vuillerme, Zdeněk Svoboda,
Nowadays, gait assessment in the real life environment is gaining more attention. Therefore, it is desirable to know how some factors, such as surfaces (natural, artificial) or dual-tasking, influence real life gait pattern. The aim of this study was to assess gait variability and gait complexity during single and dual-task walking on different surfaces in an outdoor environment. Twenty-nine healthy young adults aged 23.31 ± 2.26 years (18 females, 11 males) walked at their preferred walking speed on ...
Tópico(s): Cerebral Palsy and Movement Disorders
2021 - Multidisciplinary Digital Publishing Institute | Sensors
Produção Nacional
Revisado por pares
Emilija Stojanović, Dragan Radovanović, Vincent J. Dalbo, Vladimir Jakovljević, Nenad Ponorac, Ricardo Ribeiro Agostinete, Zdeněk Svoboda, Aaron T. Scanlan,
Tópico(s): Genetics and Physical Performance
2020 - Springer Science+Business Media | Archives of Osteoporosis
Produção Nacional
Revisado por pares
Ali Abbasi, Fateme Yazdanbakhsh, Mehdi Khaleghi Tazji, Peyman Aghaie Ataabadi, Zdeněk Svoboda, Kianoush Nazarpour, Marcus Fraga Vieira,
Recently, the use of treadmills for walking and running has increased due to lifestyle changes. However, biomechanical differences in coordination between running on a treadmill or overground have not been adequately addressed. The purpose of this study was to compare coordination and its variability in lower limb segments during treadmill and overground running at different speeds. Twenty physically active university undergraduate students participated in this study. Each participant ran trials ...
Tópico(s): Balance, Gait, and Falls Prevention
2020 - Elsevier BV | Gait & Posture
Javad Sarvestan, Zdeněk Svoboda, Petr Linduška,
This study was designated to investigate the kinematical differences between successful and faulty spikes, in order to identify the best strategies leading to better spike performance. Simulating a real-game condition, 13 elite youth attackers performed 6 spikes in the presence of 2 blocks. The kinematic variables of the spike performances were recorded using 6 optoelectronic cameras (Vicon Motion systems, Oxford, UK). The paired sample t-test was used to compare the kinematic variables recorded ...
Tópico(s): Sport Psychology and Performance
2020 - Taylor & Francis | Journal of Sports Sciences
Javad Sarvestan, Peyman Aghaie Ataabadi, Zdeněk Svoboda, Zuzana Kovačíková, Alan R. Needle,
To determine the effects of ankle Kinesio-taping (KT) on postural sway, lower limb ROM, and muscle activity during a unilateral balance tasks. Case control study design. Data were collected at the human movement analysis laboratory. 30 collegiate athletes with chronic ankle sprain (11 females and 19 males, 23.91 ± 2.58 years). Hip, knee and ankle joints ranges of motion (ROMs); postural sway area and velocities in both anteroposterior and mediolateral directions; and muscular activity amplitudes (% peak) ...
Tópico(s): Orthopedic Surgery and Rehabilitation
2020 - Elsevier BV | Physical Therapy in Sport
Zdeněk Svoboda, Lucia Bizovská, Zuzana Gonosová, Petr Linduška, Zuzana Kovačíková, Nicolas Vuillerme,
Previous studies reported a significant association between postural control and lower-limb strength of several muscle groups, however, they were focused especially on knee muscles and ankle plantar and dorsal flexors. The aim of the present study is to examine the correlation between the muscle strength of ankle invertors, evertors, plantar flexors, and dorsal flexors and the control of bipedal stance in young and older adults. Thirty one young (aged 22.8 ± 2.6 years) and thirty one older adults (aged ...
Tópico(s): Cerebral Palsy and Movement Disorders
2019 - Public Library of Science | PLoS ONE
Mark De Ste Croix, Michal Lehnert, Eliška Maixnerová, Amr Zaatar, Zdeněk Svoboda, Michal Botek, Renata Vařeková, Petr Šťastný,
Poor neuromuscular control and fatigue have been proposed as a risk factor for non-contact injuries especially around peak height velocity (PHV). This study explored the effects of competitive soccer match-play on neuromuscular performance and muscle damage in male youth soccer players. 24 youth players aged 13-16y were split into a PHV group (-0.5 to 0.5y) and post PHV group (1.0-2.5y) based on maturity off-set. Leg stiffness, reactive strength index (RSI), muscle activation, creatine kinase (CK), and ...
Tópico(s): Cardiovascular Effects of Exercise
2019 - Taylor & Francis | European Journal of Sport Science
Petr Šťastný, Michal Lehnert, Mark De Ste Croix, Miroslav Petr, Zdeněk Svoboda, Eliška Maixnerová, Renata Vařeková, Michal Botek, Martin Petřek, Lenka Kocourková, Paweł Cięszczyk,
Abstract Stastny, P, Lehnert, M, De Ste Croix, M, Petr, M, Svoboda, Z, Maixnerova, E, Varekova, R, Botek, M, Petrek, M, Lenka, K, and Cięszczyk, P. Effect of COL5A1 , GDF5 , and PPARA genes on a movement screen and neuromuscular performance in adolescent team sport athletes. J Strength Cond Res 33(8): 2057–2065, 2019—The risk of injury increases with adolescents' chronological age and may be related to limited muscle function neuromuscular, genetic, and biomechanical factors. The purpose of this study ...
Tópico(s): Genetics and Physical Performance
2019 - Lippincott Williams & Wilkins | The Journal of Strength and Conditioning Research
Javad Sarvestan, Zdeněk Svoboda,
Taping is a preventive measure commonly used for protecting and strengthening the ankle joint to prevent further musculoskeletal damage. Ankle taping prevents excessive range of motion (ROM) of the ankle joint and allows the improvement of proprioception to adjust balance. Appropriate ankle stability is essential for various activities, such as sprinting, turning, cutting, and jumping, which are associated with agility.To assess the acute effect of Kinesio taping and athletic taping on the ankle ...
Tópico(s): Sports injuries and prevention
2019 - Human Kinetics | Journal of Sport Rehabilitation
Miroslav Janura, Markéta Procházková, Zdeněk Svoboda, Lucia Bizovská, Soňa Jandová, Petr Konečný,
Ballet training has been reported to positively influence balance ability. It is not entirely clear how improved balance ability manifests under standing conditions with different demands on postural control. The aim of the study was to compare balance of ballet dancers and non-dancers in a unipedal stance under different conditions. Twenty-five professional ballet dancers and twenty-five controls completed four unipedal standing balance tests: firm surface with eyes open and closed; foam mat surface ...
Tópico(s): Diversity and Impact of Dance
2019 - Public Library of Science | PLoS ONE
Stéphane Mandigout, Justine Lacroix, Anaïck Perrochon, Zdeněk Svoboda, Timothée Aubourg, Nicolas Vuillerme,
Background: Walking represents a major component of physical activity (PA), and its restriction could degrade autonomy and quality of life. An important objective for preventive and/or rehabilitative strategies to improve balance and gait in normal and pathological aging conditions is to focus on physical activity. Activity monitors have recently been getting increasingly popular and represent a modern solution to measure-and communicate-PA notably in terms of steps/day. These activity monitors are ...
Tópico(s): Cardiovascular and exercise physiology
2019 - Frontiers Media | Frontiers in Medicine
Javad Sarvestan, Mahdi Cheraghi, Masoud Sebyani, Elham Shirzad, Zdeněk Svoboda,
are types of vertical jumps, and constitute the most useable tests for the assessment of the neuromuscular coordination of athletes (Claudino et al., 2017).In addition, CMJ is used for the assessment of the fitness level of injured athletes after rehabilitation periods, and for detecting their fitness to return to play (Clanton, Matheny, Jarvis, & Jeronimus, 2012;Henderson, Barnes, & Portas, 2010;Olsson et al., 2013).Forcetime (F-T) curve variables of CMJ are utilised to assess neuromuscular and biomechanical ...
Tópico(s): Sports Dynamics and Biomechanics
2018 - Palacký University Olomouc | Acta Gymnica
Zuzana Gonosová, Petr Linduška, Lucia Bizovská, Zdeněk Svoboda,
For quantifying muscle strength in clinical and research practice, establishing the reliability of measurements, specifically to the procedures used, is essential for credible findings. The objective was to establish the reliability of isokinetic measurement of ankle plantar and dorsal flexors (PF/DF) and invertors and evertors (INV/EV) on an IsoMed 2000 dynamometer. Twenty healthy subjects (10 males, 10 females, mean age: 23.1 ± 3.1 years) completed an isokinetic measurement session. The intraclass ...
Tópico(s): Muscle activation and electromyography studies
2018 - Multidisciplinary Digital Publishing Institute | Medicina