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Volume 1, Year 2010, Issue 1, October-December

Volume 1, Year 2010, Issue 1, October-December

Effect of hydrogel on the turf grass species growing under drought stress
Author:
Anna Hadam
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39 x
 

 

Abstract: As the supply of urban lawn grass‘ irrigation is expensive and laborious it is important to fi nd other methods which are eff ective against the water defi ciency. Th e aim of the study was therefore the assessment of hydrogels‘ infl uence on the the most common grass species (Festuca rubra, Festuca ovina, Lollium perenne) which were cultivated under controlled drought stress. Results indicated that this watersorbent increased the germination, growth and dry matter content of tested species. It was therefore concluded that using hydrogels on grasslands seems to be reasonable in accordance to the water defi ciency problems.

Keywords: watersorbent, drought, Festuca rubra, Festuca ovina, Lollium perenne

Area: Natural Sciences

BibTeX:

@article{Hadam2010,
  author = {Anna Hadam},
  title = {Effect of hydrogel on the turf grass species growing under drought stress},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {3-6},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/118-effect-of-hydrogel-on-the-turf-grass-species-growing-under-drought-stress}
}
Chromatin immunoprecipitation — new approach for revealing histone modifi cations in plants under heavy metal stress — theoretical review on advantages, drawbacks and questions
Author:
Piotr Kwasniewski
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5 x
 

 

Abstract; Heavy metal contamination is a major environmental problem. A coordinated network of molecular processes participates in plant response to heavy metals. Th e metal-dependent gene expression is regulated on multiple levels and may include chromatin modifi cations. One of the methods which allows to understand the role of histone post-translational modifi cations in plant cell response to heavy metals may be chromatin immunoprecipitation.

Keywords: chromatin dynamics, heavy metal stress, eco-physiology, ChIP, immunoprecipitation, histone modifi cations, epigenetic

Area: Natural Sciences

BibTeX:

@article{Kwasniewski2010,
  author = {Piotr Kwasniewski},
  title = {Chromatin immunoprecipitation ”new approach for revealing histone modifi cations in plants under heavy metal stress” theoretical review
on advantages, drawbacks and questions}, journal = {Challenges of Modern Technology}, year = {2010}, volume = {1}, number = {1}, pages = {7-10}, url = {http://www.journal.young-scientists.eu/index.php/isuues/file/119-chromatin-immunoprecipitation-new-approach-for-revealing-histone-modifi-cations-in-plants-under-heavy-metal-stress-theoretical-review-on-advantages-drawbacks-and-questions} }
Application of Kelvin method and mass spectrometry for investigation of oxide catalyst surface properties
Author:
Gabriela Maniak, P. Stelmachowski
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4 x
 

 

Abstract: Many oxides are applied as a catalysts for commercially important processes. Recently, decomposition of nitrous oxide into nitrogen and oxygen have became a topic of vital interest for catalytic chemistry. Two possible ways of deN2O reaction, low temperature and high-temperature, can be distinguished. Promising results were obtained for spinel oxides which contained cobalt. Because of cationic redox route, triggered by electron transfer, of N2O decomposition over these oxides, investigation of  their electronic properties was justifi ed. Th erefore the work function measurements, using Kelvin method were carried out. Moreover in-situ monitoring of processes occurred at catalyst’s surface was performed using mass spectrometry.

Keywords: work function, Kelvin method, mass spectrometry, oxide catalyst, N2O decomposition

Area: Natural Sciences

BibTeX:

@article{Maniak2010,
  author = {Gabriela Maniak and P. Stelmachowski},
  title = {Application of Kelvin method and mass spectrometry for investigation of oxide catalyst surface properties},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {11-13},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/120-application-of-kelvin-method-and-mass-spectrometry-for-investigation-of-oxide-catalyst-surface-properties}
}
Advancements in near-surface seismic refl ection acquisition
Author:
Brian E. Miller, George P. Tsofl ias, Don W. Steeples
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3 x
 

 

Abstract: 3-D seismic refl ection methods have been established as the predominant seismic method for hydrocarbon exploration. While this is true for exploration scale surveys the same is not yet true for near-surface seismic refl ection investigations. While the benefi ts of employing 3-D methods have been documented they are yet to be fully adopted by the near-surface community. Th ere are a number of reasons for this; primary among them is the labor involved with planting and re-cabling large numbers of geophones. Th e amount of time and labor involved in these operations has been a direct hindrance for 3-D investigations of the near-surface. To help overcome these limitations Th e University of Kansas geophysics group has developed a portable, automated seismic data acquisition system, known as the autojuggie. Th e autojuggie allows for effi cient ultra-shallow seismic imaging and is capable of quickly performing non-invasive, high-resolution 2-D or 3-D seismic surveys by deploying a dense array of geophones.

Keywords: near-surface seismology, near-surface seismic refl ection, near-surface seismic acquisition

Area: Natural Sciences

BibTeX:

@article{Brian2010,
  author = {Brian E. Miller and George P. Tsoflias and Don W. Steeples},
  title = {Advancements in near-surface seismic refl ection acquisition},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {14-18},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/121-advancements-in-near-surface-seismic-refl-ection-acquisition}
}
Liquid chromatographic techniques in separation of betacyanins and their derivatives from red beet roots (Beta vulgaris L.)
Author:
Aneta Spórna, P. Stalica, G. Jerz, M. Szaleniec, S. Wybraniec
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15 x
 

 

Abstract: A study on separation of betacyanins and their decarboxylated as well as dehydrogenated derivatives obtained from red beet roots (Beta vulgaris L.) in high pressure liquid chromatography (HPLC) and ion-pair high-speed counter-current chromatography (IP-HSCCC) was performed. Th e IP-HSCCC process was accomplished in the ‘head-to-tail’ mode in a solvent system composed of butanol — acetonitrile — water (5:1:6 v/v/v, acidifi ed with 0.7% trifl uoroacetic acid). Th e HPLC separation was performed in a typical reversed phase mode with mass spectrometry (ESI-MS) and diode-array (DAD) detection. Th e chromatographic profi les of betalains obtained in these two techniques were signifi cantly diff erent. In HPLC, the most polar compounds, like betanin and isobetanin, eluted before less polar decarboxylated and dehydrogenated derivatives (mostly degradation products of betanin). In IP-HSCCC, the dehydrogenated derivatives were eluted faster then their non-dehydrogenated analogues. It was observed for the fi rst time that betanin and neobetanin (14,15-dehydrogenated betanin), which are present in many plants containing betalains, had reversed elution orders during chromatographic separation by these two techniques.

Keywords: betanin, betalains, betacyanins, ion-pair counter-current chromatography, perfl uorinated carboxylic acids

Area: Natural Sciences

BibTeX:

@article{Sporna2010,
  author = {Aneta Spórna and P. Stalica and G. Jerz and M. Szaleniec and S. Wybraniec},
  title = {Liquid chromatographic techniques in separation of betacyanins and their derivatives from red beet roots (Beta vulgaris L.)},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {19-22},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/122-liquid-chromatographic-techniques-in-separation-of-betacyanins-and-their-derivatives-from-red-beet-roots-beta-vulgaris-l}
}
Parylene N coating on stainless steel surface as a protective layer for metal implants
Author:
Monika Cieślik
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6 x
 

 

Abstract: The protection properties of parylene coating on implant stainless steel 316L was investigated. The electrochemical measurements and metal ions release tests in Hanks solution revealed that the coating can be successfully used for corrosion protection. The addition of hydrogen peroxide, simulating the infl ammatory response of human body causes a decrease of protection properties of the coating. However, usage of parylene coating on stainless steel reduce iron ions release rates.

Keywords: stainless steel, implantable material, polymer protective coating, parylene

Area: Biomedical Engineering

BibTeX:

@article{Cieslik2010,
  author = {Monika Cieślik},
  title = {Parylene N coating on stainless steel surface as a protective layer for metal implants},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {23-26},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/123-parylene-n-coating-on-stainless-steel-surface-as-a-protective-layer-for-metal-implants}
}
Intracranial EEG Evaluation of a Resting State Network
Author:
Dominique Duncan, Robert B. Duckrow, Ronald R. Coifman, Hitten P. Zaveri
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3 x
 

 

Abstract: The study of brain networks is based, to a large extent, on pairwise measurements of relationships. Such pairwise relationships can be estimated from brain electrical activity measured from the scalp with routine EEG, from intracranial electrodes during monitoring for epilepsy surgery, or with functional MRI (fMRI) measurements. Here we focus on the study of brain networks through the measurement of pairwise relationships in brain electrical activity as measured by intracranial EEGs. Intracranial EEG data from 11 patients were tested for the presence of relationships which would confi rm or disconfi rm the presence of a resting state network which has previously been observed with fMRI. Mutual information was used as a measure of relationship.

Keywords: Resting State Networks, Mutual Information, Correlation, Epilepsy, Intracranial EEG

Area: Biomedical Engineering

BibTeX:

@article{Duncan2010,
  author = {Dominique Duncan and Robert B. Duckrow and Ronald R. Coifman and Hitten P. Zaveri},
  title = {Intracranial EEG Evaluation of a Resting State Network},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {27-29},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/124-intracranial-eeg-evaluation-of-a-resting-state-network}
}
Photodynamic therapy procedures in the microfl uidic system
Author:
Elżbieta Jędrych, Zuzanna Pawlicka, Michał Chudy, Artur Dybko, Zbigniew Brzózka
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1 x
 

 

Abstract: Evaluation of the effi ciency of photodynamic therapy (PDT) in a hybrid microfl uidic culture system was studied. Th e geometry of the utilized microsystem for PDT procedures consists microchambers for cell culture and microchannels, which create a concentration gradient generator (CGG). 5-aminolevulinic acid (ALA) as a precursor of the photosensitizer was used. The geometry of the microchip allowed to test diff erent concentrations of ALA in a single assay. Evaluation of the effi ciency of photodynamic therapy was determined 24 hours after PDT procedure (irradiation with light which induced accumulated in carcinoma cells). Th e performed microsystem contained two independent micropatterns, that enables examination simultaneously various cell lines (carcinoma and normal) or various photosensitizers.

Keywords: photodynamic therapy (PDT), microfl uidic culture system, PDMS, adherent cell culture, concentration gradient generator (CGG), 5-aminolevulinic acid (ALA)

Area: Biomedical Engineering

BibTeX:

@article{Jedrych2010,
  author = {Elżbieta Jędrych and Zuzanna Pawlicka and Michał‚ Chudy and Artur Dybko and Zbigniew Brzółzka},
  title = {Photodynamic therapy procedures in the microfl uidic system},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {30-33},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/125-photodynamic-therapy-procedures-in-the-microfl-uidic-system}
}
CFD simulations of blood flow through abdominal part of aorta
Author:
Andrzej Polanczyk, Aleksandra Piechota
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13 x
 

 

Abstract: The aim of this research was to show superiority of using real geometries in simulations of blood fl ow through cardiovascular system. Our model compared blood fl ow through an abdominal part of aorta reconstructed with a use of data from an AngioTK research with the 3DDoctor software to geometries with the same diameters at inlet and outlet as mention before but created only with the Gambit 2.2.30 software without data from AngioTK. Blood fl ow simulations were prepared with the Fluent 6.2.16 software. Calculations of fl ow through a real geometry allows to obtain realistic results of values connected with process of blood flow. Results showed that calculations blood fl ow through a virtual geometry lasted two times longer than for a real geometry. Mesh for a real geometry consist about 600.000 elements and for a virtual geometry about 900.000 elements. Wall shear stress and blood velocity was higher for a real geometry and closer to that in human organism. It was shown that calculating a virtual geometry vessel was to big simplifi cation when investigating blood flow through a vessel. Application of mathematical models based on real geometries gives more realistic results than artifi cial geometries. Virtual models have lots of simplifi cations which results are far away from expectations. Simplifi cations depend on the model that is used.

Keywords: CFD, abdominal aorta, computer simulations, computer tomography, geometry

Area: Biomedical Engineering

BibTeX:

@article{Polanczyk2010,
  author = {Andrzej Polańczyk, Aleksandra Piechota},
  title = {CFD simulations of blood flow through abdominal part of aorta},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {34-39},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/126-cfd-simulations-of-blood-flow-through-abdominal-part-of-aorta}
}
Robustness and disturbance rejection with application of linear MPC technique to industrial manipulators
Author:
Ali Benniran
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8 x
 

 

Abstract: This paper studies an application of linear MPC and PID techniques to a 6-DOF industrial manipulator. Th e manipulator is IRp-6 made by ABB during 70s of last century. It is characterized by high gear ratios and joint linear friction. Th ese make the control task more convenient for PID. Th e robustness and stability against model un-certainty were examined. Also, the effi  ciency of both techniques against noise rejection was checked by adding a white Gaussian noise. Results of simulation prove the advantages of MPC technique to PID in robustness and noise rejection.

Area: Mechanics, Automation and Robotics

BibTeX:

@article{Benniran2010,
  author = {Ali Benniran},
  title = {Robustness and disturbance rejection with application of linear MPC technique to industrial manipulators},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {40-47},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/127-robustness-and-disturbance-rejection-with-application-of-linear-mpc-technique-to-industrial-manipulators
}
Semiautonomy and teleoperation modes of mobile robot IBIS — simulation and implementation
Author:
Piotr Bigaj, Maciej T. Trojnacki, Jakub Bartoszek
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1 x
 

 

Abstract: The work is concerned on the simulation and implementation of teleoperation and semiautonomy modes of IBIS mobile robot. A description of robot construction, used sensors as well as the algorithm for semiautonomy mode of operations is introduced. Simulation environment and experiment with Matlab/Simulink package with Simulink 3D Animation toolbox is  discussed. In addition, an experiment on real target/robot and its results are presented as the scope of work.

Keywords: autonomous mobile robot, VFH, AMR, semiautonomy

Area: Mechanics, Automation and Robotics

BibTeX:

@article{Bigaj2010,
  author = {Piotr Bigaj, Maciej T. Trojnacki, Jakub Bartoszek},
  title = {Semiautonomy and teleoperation modes of mobile robot IBIS simulation and implementation},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {48-55},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/128-semiautonomy-and-teleoperation-modes-of-mobile-robot-ibis-simulation-and-implementation}
}
Java simulator for an autonomous mobile robot operating in the presence of sensor faults
Author:
Adam Srebro
Downloads:
10 x
 

 

Abstract: This paper presents two-dimensional mobile robot simulator written in Java. Robot performs autonomous navigation based on infrared sensors. Sensing range and angle can be adjusted in real-time. Obstacle detection an avoidance algorithm was implemented. In this paper, the wall-following problem for mobile robot in the presence of sensors faults is considered in  detail. Time related method of robot orientation relative to the wall is shown. A few experimental tests are reported to discuss the robustness of control algorithm and verify simulations results.

Keywords: autonomous, mobile robots, simulator, wall-following

Area: Mechanics, Automation and Robotics

BibTeX:

@article{Srebro2010,
  author = {Adam Srebro},
  title = {Java simulator for an autonomous mobile robot operating in the presence of sensor faults},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {56-60},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/129-java-simulator-for-an-autonomous-mobile-robot-operating-in-the-presence-of-sensor-faults}
}
Geotechnical parameters in description of soft soils consolidation
Author:
Katarzyna Gabryś
Downloads:
4 x
 

 

Abstract: The construction of embankments on organic soils is associated with necessary to improve subsoil conditions. Soft organic soils are often highly compressible and have low shear strengths, what causes large deformation, both vertically as well as horizontally, that may occur during and after the construction period [11]. Th e settlements usually appear quickly but can also continue for a very long time because of the secondary compression [6]. However, in Poland there are large areas with soft organic soils where diff erent kinds of embankments have to be constructed. In these cases, the prediction of soil behavior and the selection of a proper design method becomes an important and complex engineering task. In this paper the  analysis of the soft subsoil deformation process under load is presented. Th e main factors that determine the consolidation of soft subsoil are described, as well as the proposition of changes in organic soils properties for better prediction of the construction’s settlements. Based on fi eld observations and laboratory test results, the characterization of organic soft soils and the results the calculation procedure are proposed.

Keywords: organic soils, geotechnical parameters, consolidation, deformation process

Area: Town and Urban Planning, Architecture and Building Engineering

BibTeX:

@article{Gabrys2010,
  author = {Katarzyna Gabryś},
  title = {Geotechnical parameters in description of soft soils consolidation},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {61-64},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/130-geotechnical-parameters-in-description-of-soft-soils-consolidation}
}
Application of stereovision, digital maps and inertial sensors for estimation of geographical location
Author:
Przemysław Barański, Maciej Polańczyk, Paweł Strumiłło
Downloads:
7 x
 

 

Abstract: The paper presents an approach that integrates stereoscopic images, numerical maps of terrain and inertial sensors’ signals for estimation of geographical location of system user. Th e proposed solution improves on the GPS system in terms of accuracy and it can be used also inside buildings where GPS readouts are not available. Th e system was designed with a view of blind pedestrians. Th e prototype employs the particle fi ltering algorithm to fuse data from diff erent sources.

Keywords: sensor fusion, GPS navigation, stereovision, digital maps, dead reckoning

Area: Electronics and Information Technologies

BibTeX:

@article{Baranski2010,
  author = {Przemysł‚aw Barański, Maciej Polańczyk, Paweł‚ Strumiłło},
  title = {Application of stereovision, digital maps and inertial sensors for estimation of geographical location},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {65-68},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/131-application-of-stereovision-digital-maps-and-inertial-sensors-for-estimation-of-geographical-location}
}
Ontology-Based Information Extraction: Current Approaches
Author:
Marcin Białek
Downloads:
12 x
 

 

Abstract: The purpose of Information Extraction (IE) is extracting information from unstructured, or semi structured machine readable documents by automatic means. Generally this means dealing with human language texts using natural language processing (NLP) techniques. Recently on the market of IE systems a new player emerged. Ontology-Based IE (OBIE) idea consequently gains more and more supporters. In this approach a crucial role in the IE process is played by ontology (formal representation of the knowledge by a set of concepts within a domain and the relationships between those concepts). Using Ontology as one of the IE tools makes OBIE very convenient approach for gathering information that can be later on used in construction of Semantic Web. In this paper I will explain the idea of OBIE with its fl aws and advantages. I will try not only to provide theoretical approach, but also to review current trends in this fi eld. Th is will be done to point out some common architecture in currently used systems and in the end classify them based on diff erent factors depending on their usability in real life application. As a conclusion an attempt to identify possible trends and directions in this fi eld will be made.

Keywords: Ontology-Based Information Extraction, Information Extraction, Semantic Web, Ontology, Knowledge Representation

Area: Electronics and Information Technologies

BibTeX:

@article{Bialek2010,
  author = {Marcin Białek},
  title = {Ontology-Based Information Extraction: Current Approaches},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {69-75},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/132-ontology-based-information-extraction-current-approaches}
}
A Java-based secure platform for distributed computation
Author:
Artem Glebov
Downloads:
4 x
 

 

Abstract: We present a platform for distributed computation that employs Java RMI as the underlying communication technology, making use of its remote class-loading features. Th e platform permits dynamic connection of executor nodes and guarantees that executors are properly released. Security is reinforced by authentication based on X.509 certifi cates and SSL  encryption. We show that the overhead associated with authentication and encryption is negligible in practically important cases.

Keywords: distributed computations, Java RMI, remote method invocation security, authentication and encryption overhead

Area: Electronics and Information Technologies

BibTeX:

@article{,
  author = {Artem Glebov},
  title = {A Java-based secure platform for distributed computation},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {76-78},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/133-a-java-based-secure-platform-for-distributed-computation}
}
Corrosion and Stress Corrosion Cracking of New Wrought Magnesium Alloys
Author:
Guy Ben-Hamu
Downloads:
3 x
 

 

Abstract: New magnesium alloys (Die-Cast and wrought) have increasingly been developed in recent years for the automotive industry due to their high potential as structural materials for low density and high strength/weight ratio demands. However, their poor mechanical properties and low corrosion resistance have led to a search for new kinds of magnesium alloys with better strength, ductility, high temperature behaviour and high corrosion resistance. Th e main objective of this research is to investigate the corrosion behaviour of new magnesium alloys: Mg-Al-Ca, Mg-Al-Sr, Mg-Zn-Mn-Si (ZSM) and Mg-Zn-Mn-Si-Ca (ZSMX). Th ese ZSM6X1 and ZSM651+YCa alloys were prepared using hot extrusion. Th ese Mg-Al-Ca and Mg-Al-Sr were prepared using high pressure die cast. AC and DC polarization tests were carried out on the new alloys. Microstructure was examined using optical and electron microscopy (SEM) and EDS. Th e addition of Si increased the corrosion resistance. Th e additions of Sr and Ca also aff ected the corrosion behaviour. Th ese results can be explained by the eff ects of alloying elements on the microstructure of Mg alloys such as grain size and precipitates caused by the change in precipitation and recrystallisation behaviour.

Keywords: Magnesium Alloy, Die Cast, Hot Extrusion, Alloying Element, Electrochemical Techniques

Area: Nanotechnologies and Materials

BibTeX:

@article{BenHamu2010,
  author = {Guy Ben-Hamu},
  title = {Corrosion and Stress Corrosion Cracking of New Wrought Magnesium Alloys},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {79-87},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/134-corrosion-and-stress-corrosion-cracking-of-new-wrought-magnesium-alloys}
}
Determination of bone volume porosity based on histograms of the mCT scans
Author:
Paweł Gadzała, M. Cieszko, Zbigniew Szczepański, G. Zych
Downloads:
1 x
 

 

Abstract: The new method is proposed in the paper for determination of volume porosity of bone tissue based on histograms of 3D mCT scans and also precise defi nition of the threshold value of relative density preserving calculated volume porosity during the reconstruction of the binary image of sample. In this method the normed histogram is considered as a probability  distribution of relative mass density in the bone sample. It was shown that the normed histograms of increasing 3D sample are convergent to the limit curve which can be interpreted as a representative histogram of given sample. The limit histograms have been used to determine: the distributions of relative densities in the sets of voxels of pore and skeleton type and their characteristics, the volume porosities of both samples and thresholds values of their binarisation.

Keywords: volume porosity, bone tissue, computed microtomography, mCT, histogram, probability distribution, voxels, thresholding, microscopic

Area: Nanotechnologies and Materials

BibTeX:

@article{Gadzala2010,
  author = {Paweł‚ Gadzała and M. Cieszko and Zbigniew Szczepański and G. Zych},
  title = {Determination of bone volume porosity based on histograms of the mCT scans},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {88-89},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/135-determination-of-bone-volume-porosity-based-on-histograms-of-the-mct-scans}
}
Application of Micro Computer Tomography to Identifi cation of Pore Structure Parameters of Porous Materials
Author:
Zbigniew Szczepański, M. Cieszko, Paweł Gadzała, G. Zych
Downloads:
5 x
 

 

Abstract: The purpose of this paper is to apply the scans of microscopic geometry of human bones obtained by Micro Computer Tomography method to identifi cation of their macroscopic pore structure parameters: volume porosity, permeability and tortuosity of pores and skeleton. Th ese parameters, except the volume porosity, have been determined by simulations of microscopic processes of viscous fl uid fl ow and electrical current passage through virtual models of bones samples. The simulations wave performed using the COMSOL’s Multiphysics environment assigned for solution of boundary value problems described by partial diff erential equations, by use of the fi nite element method.

Keywords: volume porosity, bone tissue, computed microtomography, mCT, binarization, voxels, thresholding, microscopic

Area: Nanotechnologies and Materials

BibTeX:

@article{Szczepanski2010,
  author = {Zbigniew Szczepański, M. Cieszko, Paweł‚ Gadzała, G. Zych},
  title = {Application of Micro Computer Tomography to Identifi cation of Pore Structure Parameters of Porous Materials},
  journal = {Challenges of Modern Technology},
  year = {2010},
  volume = {1},
  number = {1},
  pages = {90-91},
  url = {http://www.journal.young-scientists.eu/index.php/isuues/file/136-application-of-micro-computer-tomography-to-identifi-cation-of-pore-structure-parameters-of-porous-materials}
}
CoMT 1_1 BibTex
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