Liberec Prague CZECH REPUBLIC - ICAME€¦ · OF STRATEGY OF REGIONAL DEVELOPMENT The main goal of the project was to analyze Brownfield sites in the Czech Republic, to create proposals

Liberec

Prague

CZECH REPUBLIC

WITH THE TECHNICAL UNIVERSITY OF LIBEREC (TUL)

WHY COOPERATE

EUROPEAN UNION

TECHNICAL UNIVERSITY OF LIBEREC

ENGINEERING PROGRAMMES AND MUCH MORE

Tradition of more than 60 years (since 1953)

More than 35 000 graduates

Students from 40 countries

Medium-size university with 7 Faculties and 1 Specialist Institute

Bachelor, Master and Ph.D. study courses

Over 1 300 employees

ENGINEERING PROGRAMMES AND MUCH MORE

SUCCESSFUL IN SCIENCE AND TECHNOLOGY TRANSFER

SCIENCE AND RESEARCH

RESEARCH AND TECHNOLOGY TRANSFER

Science and research – more than 50% of the total activity of TUL

Over 100 projects

Numerous inventions and new technologies

Centre for Technology Transfer established to promote ties to

industry

COOPERATION OPPORTUNITIES

EXCELLENT RESULTS IN RESEARCH AND SCIENCE

ACTIVE CATALYTIC LAYERS FOR WATER TREATMENT


Type of filter primarily designated for the final drinking and

industrial water treatment

Based on an active filter material with nanofibers containing

chemically or biologically active materials

Filter composed by a tube with the composite with the nanofibrous

yarn compatible with a standard water treatment systems


PATENTED PRODUCT WITH MANY ADVANTAGES:

Easy solution for small users as well as big industrial systems

Wide range of applications – many filter producers

Stability of the active materials in filter


Partners for implementation of the product on the market

Partners for cooperation on the improvement of the product for other applications


SOUND ABSORPTION NANOMATERIALS

Application of the nanofibrous layer on the base material

To increase noise absorption

Decrease dimensions and weight of the product



ADVANTAGES Huge improvements in weight and width of the material

Decreased costs of the material while improving acoustic absorption

Improvement of sound characteristics of almost all acoustic materials

COOPERATION OPPORTUNITIES Partners for implementation of the product on the market in applications of Construction, Engineering, Automotive, Phonics and others

Partnership for cooperation on the improvement of the product for other applications


UTILIZATION OF FILLERS IN POLYMER SYSTEMS

UTILIZATION OF NATURAL ORGANIC-INORGANIC FILLERS IN

POLYMER SYSTEMS

Technology based on the preparation of composites with high useful

properties achieved by adding specific fillers

Polymer composite systems filled with natural fillers based on epoxy

resin can be prepared with required level of tribological parameters

characterized by friction coefficient


CURRENT SITUATION

The product is patented and can be used in engineering areas. The main potential lies in the

preparation of leveling of materials, cements, polymer concrete compositions, cast floors and

surface finishing materials with high abrasion resistance or other products based on epoxy

resins designed to meet the user’s requirements.


Collaborative research related to the optimization of the product quality in respect to end-

user needs

Partnership for cooperation on the improvement of the product for other applications


REGENERATION OF BROWNFIELDS

REGENERATION OF BROWNFIELDS AS A PART OF STRATEGY OF REGIONAL DEVELOPMENT

The main goal of the project was to analyze Brownfield sites in the Czech Republic, to create

proposals for revitalization.

FOR THE NEEDS OF REGIONAL INSTITUTIONS HAVE BEEN CREATED

FOLLOWING OUTPUTS:

DATABASE STRUCTURE

Subsystem of the monitoring

Subsystem of the micro area

Subsystem of the macro area

CATALOGUE

Locations of the Brownfields type and information about the business development in the

Liberec Region.

SPEECHLAB

The Laboratory of Computer Speech Processing aims at research in speech recognition, speech

synthesis, speaker recognition and verification, audio-visual speech processing, multi-channel

signal processing, and others.


ASR (Automatic Speech Recognition) algorithm design, system development, solutions for

inflected languages

Voice technology applications

Speaker identification and verification

Voice-operated software for handicapped PC users

SPEECHLAB

LABORATORY OF LASER ANEMOMETRY

Contactless measurements of flow and thermal fields, quantitative visualizations, spray

characterizations and micro-fluidic measurement.


Applications of Global Imaging Methods (PIV, IPI, PLIF, microPIV)

Quantitative visualization of multi-phase mediums

Analyzing of industrial processes, including optimization and time evaluation

High speed cameras recording and image analyzing, Electrical impedance tomography

Digital holographic interferometry

LABORATORY OF LASER ANEMOMETRY

COMPOSITES WITH FILLERS FROM NATURAL FIBERS

Composites with natural fillers based on synthetic matrices and PLA –

based matrices

Different industrial applications ranging from technical plastic parts to

plastic consumer and other products

Patented

COMPOSITES WITH FILLERS FROM NATURAL FIBERS

(NF COMPOSITES)

PROTECTIVE HALF MASKS

Product with the application of polymers , silicones and nanomaterials

Development and construction of machinery for composing of

nanomaterials

Application of non-standard technologies

Patented, utility models, prototypes, license agreement

PROTECTIVE HALF MASKS WITH FILTERS FROM NANOFIBER MATERIAL

PROTOTYPE FOR RAPID DIAGNOSIS OF DISEASES

Diagnostic device for automatic isolation of DNA from

a biological sample

Subsequent PCR reaction with continuous fluorescence detection in real

time

Instantaneous diagnosis of human diseases

Unique device connecting automatic isolation of DNA with actual

detection and analysis of obtained isolate

PROTOTYPE FOR RAPID DIAGNOSIS OF INFECTIOUS AND GENETIC HUMAN DISEASES

HYDROGEN ENGINE WITH INTERNAL COMBUSTION

New fuel system designed and constructed

Hydrogen is fed by high pressure line (20 MPa) from the source and prior

to injection into engine, fuel pressure is regulated to 1 - 10 MPa

HYDROGEN ENGINE WITH INTERNAL COMBUSTION

NANOCOMPETENCE

Tissue engineering

Muscles

Vessel

Cartilage

Bones

NANOCOMPETENCE IN MEDICAL FIELD

NANOCOMPETENCE

Electrospinning – NanospiderTM

Applications in tissue engineering, specialty filtration and radioprotective

protection

THE BREAKTHROUGH PATENT ON NANOFIBERS

NANOCOMPETENCE

Implants made from nanofibers

TUL research in cooperation with medical and other specialists

Helping patients with knee pain

Huge potential for other bio-medical applications

BODY IMPLANTS – KNEE CARTILAGE

NEW MATERIALS

Development of clothing with wearable electronics

Jacket that, riding a bicycle, signals a change in direction

CYCLING JACKET WITH SIGNALING LED

Active safety elements from optical fiber

APPLICATION OF OPTICAL FIBERS

NEW MATERIALS

Increased electrical conductivity

Barrier fabrics (in clean rooms, workplaces with sensitive electronics,

protection against radiation)

Comfortable hand, flexible, breathable

PROTECTION AGAINST ELECTROMAGNETIC SMOG

NEW MATERIALS

= COLOR DEPENDING ON TEMPERATURE, MOISTURE...

USAGE

Dyes and textile designing filters for UV radiation

Dosimeters

Indicator of bacteria and toxic substances

CHAMELEON FABRIC

BIOMEDICAL APPLICATION OF NANOFIBERS

PROPERTIES Sol-gel preparation, soluble in the body fluids, biocompatible, non-toxic

Immobilizing various types of biomolecules

APPLICATIONS Treatment of hard-to-heal wounds (venous ulcers, pressure ulcers, postoperative wounds, chronic wounds)

Immobilized biomolecules are released into the wound bed

Nanofibers adhere to the wound surface – do not produce air bubbles

BIOMEDICAL APPLICATION OF SILICA DIOXIDE NANOFIBERS

BIOMEDICAL APPLICATION OF NANOFIBERS

IMMOBILIZATION POSSIBILITIES

Antibiotics and Enzymes

Disinfectants (chlorhexidine)

EXAMPLE OF TREATING

Male, 90 years, polymorbid condition, varicose ulcer for 15 years on lower limb

UNIQUENESS

No similar commercial material

Silica nanofibres – accelerate the wound healing process

Day 1

Day 56 – total healing

BIOMEDICAL APPLICATION OF SILICA DIOXIDE NANOFIBERS

GAIT ANALYSIS AFTER CALCANEUS FRACTURE

GAIT ANALYSIS OF PATIENTS AFTER CALCANEUS FRACTURE

Analysis of the pressure distribution on the mat – optimization of the

treatment and subsequent rehabilitation

Cooperation with Regional Hospital

Clinical Biomechanics

Plantar pressure analysis after intra-articular calcaneal fracture

Soňa Jandová,

Technical University of Liberec, Czech Republic

Calcaneal fractures

- complex injuries, typically affecting the middle-aged active population (Sanders, 2000);

- The main causes include falls and landing from heights;

- In most cases (75%), they are intra-articular fractures (Rammelt, & Zwipp, 2004).

Calcaneal fractures

- For displaced fractures, surgical treatment is preferred (Buckley et al., 2002; Gougoulias, Khanna, McBride, & Maffulli, 2009; Ibrahim et al., 2007; Jiang, Lin, Diao, Wu, & Yu, 2012);

- The aim of surgical treatment is to restore the articular surface congruence of the talocalcaneal and calcaneocuboid joints and correct the overall shape and realignment of the axis of the calcaneus.

Possible surgical treatments

- Extended lateral approach (EXT) - allows good visualization of the

heel from the lateral side;

- In this surgical approach, however, some early complications may arise in 3-25% of patients (Al-Mudhaffar, Prasad, & Mofidi, 2000; Buckley et al., 2002; Rammelt, & Zwipp, 2004).

- Sinus tarsi approach (ST) - less invasive surgical approaches

with a reduced risk of early postoperative problems

Fracture treatment results are assessed in several ways:

- Clinical examination

- X ray and CT - not always consistent

results(Hirschmüller et al., 2011).

Nevertheless, it is quite common that despite the satisfactory results of clinical examination, abnormalities in the gait pattern after surgery remain noticeable (Kinner, Best, Falk, & Thon, 2002; Schepers, Van der Stoep, Van der Avert, Van Lieshout, & Patka, 2008; Rosenbaum, Lübke, Bauer, & Claes, 1995).

other instrumentation methods to evaluate treatment outcomes - Pedobarography - allows plantar pressure analysis at various time intervals after surgery ;

- abnormalities in the plantar pressure distribution between uninjured and operated limbs while walking can be confirmed

Possible foot-strike pattern abnormalities according to Hestroni et al, 2014):

- shortened stance phase;

- delayed timing of peak pressure under the hallux and second toe,

- lateral load shift at the midfoot,

- decreased toe pressures in operated limbs (Hetsroni et al., 2014).

Physiological walking:

- symmetry in the action of the lower limbs and symmetry of the ground reaction forces (Hamill, Bates, & Knutzen, 1983).

Pathological gait:

- differences between dynamic parameters calculated from the right and left lower limbs

Our study purpose:

- to compare the gait in terms of foot loading and temporal variables of the stance phase after two different operative approaches 6 months after the surgery.

The 5th International Conference on Advances in Mechanical Engineering 2017, Ao Nang Villa Resort, Krabi, Thailand, August 16-18, 2017.

Method

participants

N = 22 (21 men, 1 women)

age = 44.96±11.75 years

height = 1.78±0.05 m

weight = 79.5±11.08 kg)

6 months after unilateral intra-articular calcaneal fracture

(Sanders type II and III)

2 groups of patients:

Patiets after invasive (EXT) surgical treatment (N = 12)

Patients after less invasive (ST) approach (N = 10)


Methods

Temporal and dynamic variables

measurement

walking on the pedography

measurement platform (EMED-

c50/R, Novel, Munich, Germany) –

frequency 100 Hz

Walking barefoot at a self-selected

speed

three steps before and after the

platform

5 individual steps of operated (OPE)

and 5 steps of uninjured (UIN) legs


Loading variables Peak Pressure, representing the maximum pressure

recorded under the whole foot,

maximum vertical force,

vertical force time integral

Peak Pressure under the heel


Temporal variables

contact time of the whole

foot with the ground

Heel contact time

percentage of the time

when the centre of

pressure (CoP) is in the

heel zone, midfoot zone,

forefoot zone and toes

zone

maximal velocity of CoP

average velocity of CoP.

Fig. Sample of gait analysis completed with software Emed (Novel, DE)


Statistics

Mann-Whitney test was used to determine the differences in basic

physical characteristics between the groups

To compare OPE and UIN limbs, the Wilcoxon paired test was used

Differences were considered significant at a level of P<0.05.


Results

Legend: EXT, extended lateral approach; ST, sinus tarsi approach; OPE, operated leg; UIN, uninjured leg; CT, contact time with the ground; PPrel, maximum pressure per body weight; MVFrel, maximal vertical force relativised to body weight; CTH, contact time of the heel with the ground; PPHrel, maximum pressure under the heel relativised to body weight; FTI, force time integral relativised to body weight; CoP, centre of pressure; vmax, maximal velocity; vave, averrage velocity; P, significance level in the Wilcoxon test; r, Cohen effect size.

EXT (n=12) ST (n=10)

OPE UIN P r OPE UIN P r

Mean SD Mean SD Mean SD Mean SD

CT [ms] 861.4 163.4 877.6 157.5 0.20 0.37 876.1 163.6 905.8 165.7 0.03 0.68

PPrel 4.71 1.17 6.21 1.73 0.01 0.75 5.62 2.11 6.27 1.89 0.24 0.37

MVFrel 10.63 0.56 11.13 0.76 0.01 0.77 11.46 1.05 11.81 1.13 0.14 0.47

CTH [ms] 661.2 142.7 553.0 119.2 <0.01 0.84 635.9 181.3 593.6 117.7 0.51 0.21

PPHrel 3.73 0.64 4.21 0.60 0.03 0.61 3.69 1.23 4.21 0.94 0.02 0.73

FTIrel 6.59 0.73 7.28 0.65 <0.01 0.82 7.36 1.02 7.91 1.31 0.01 0.85

CoP trajectory [%]

Heel 30.14 5.17 23.52 5.34 0.02 0.66 24.83 5.61 23.62 5.94 0.28 0.34

Midfoot 37.24 10.35 22.63 6.67 0.00 0.86 37.72 15.10 25.11 5.71 0.07 0.56

Forefoot 28.39 12.21 48.01 9.45 0.01 0.79 30.72 12.66 45.24 10.37 0.02 0.73

Toes 4.23 3.05 5.85 4.25 0.03 0.83 6.72 2.008 6.02 2.56 0.33 0.31

CoP velocity [m·s-1]

vmax 0.95 0.356 0.687 0.193 0.03 0.63 0.792 0.192 0.775 0.277 0.80 0.08

vave 0.280 0.031 0.271 0.035 0.05 0.81 0.283 0.042 0.273 0.050 0.09 0.57

1


Results

Extended lateral approach: statistically significant differences (P<0.05) between the

OPE and the UIN in most of the observed variables (except contact time with the ground)

Sinus tarsi approach the OPE and the UIN values were statistically

significantly different only at contact time with the ground, peak pressure under the heel, force time integral, and CoP trajectory in the forefoot.


Conclusions The differences in load between the OPE and the UIN

persist six months after the surgery

Regardless of the surgical approach chosen, patients tread on the OPE so that it is less loaded, with the tendency to shift the load towards the midfoot and forefoot.

After a less invasive ST approach, the operated limb is loaded similarly to the healthy one.

In a group of ST patients – better symmetry

The hypothesis that foot loading differences between OPE and UIN are greater in the EXT than in the ST approach 6 months after surgery was supported.


Conclusions

Therefore, it is possible to recommend the ST

surgical approach for treatment of displaced

fractures of the calcaneus, in which reduced pain

due to the limited extent of the surgical approach

should be considered.

Liberec

Prague

CZECH REPUBLIC

Thank you for your attention and see you in the Czech Republic!

Documents

Liberec Prague CZECH REPUBLIC - ICAME€¦ · OF STRATEGY OF REGIONAL DEVELOPMENT The main goal of the project was to analyze Brownfield sites in the Czech Republic, to create proposals