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1
Content available Preliminary research on application of virtual reality as optical stimulation in videonystagmography
Kostorz I., Kowalski W., Ludwig Z.
Journal of Medical Informatics & Technologies
|
2018
|
Vol. 27
9--20
EN
The paper presents a research on the utilization of a virtual reality as means of stimulation during a videonystagmography examination. The main aim of the research was to test whether an optical stimulation generated by means of virtual reality presented in a helmet-mounted display is applicable to the videonystagmography examination. Eye position was recorded by an infrared camera mounted in virtual reality head-set. Visual stimulations were first performed on a LCD display mounted in VR goggles and then on a LCD monitor. Tracking of a moving field was a subject's task. Target horizontal and vertical jumps were used for calibration. Visual stimuli applied were pendulum target movement and moving vertical stripes. The results of tests showed that pupil positions registered during the virtual stimulation were consistent with those registered during the traditional stimulation.
2
Content available Database structure for storing and automatic analysis of text GTG and fish cytogenetic results
Kostorz I., Sikora M., Stęclik T.
Journal of Medical Informatics & Technologies
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2018
|
Vol. 27
41--48
EN
The paper presents research on storing text cytogenetic tests data conducted with GTG and FISH methods for browsing and automatic processing of its string results. It presents analysis of the text cytogenetic test result and a two proposal structures of the databases (the storing data and the analytical one) used for anonymised text GTG and FISH cytogenetic test results storing and their processing. Presented structures were queried with known chromosome aberrations for T-cell acute lymphoblastic leukaemia (T-ALL), B-cell acute lymphoblastic leukaemia (B-ALL) and both T-ALL and B-ALL in the proposed database. Additionally, the analytical database was filled with the set of Mittelman database results and browsed with non-standard queries. Conducted tests demonstrated that the proposed analitical structure is useful for GTG and FISH cytogenetic test results text mining.
3
Content available Research on utilization of virtual reality as optical stimulation in electronystagmography
Kostorz I., Kowalski W., Ludwig Z.
Journal of Medical Informatics & Technologies
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2016
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Vol. 25
9--18
EN
The paper presents a research on the utilization of an up-to-date virtual reality set as a stimulation during an electronystagmography examination. The main aim of the research was to test whether an optical stimulation generated by means of virtual reality presented in a helmet-mounted display is comparable with the same methods of stimulation generated in a human natural environment. The experiments were conducted using an amplifier of electronystagmography signals, an acquisition software and the Oculus Development Kit 2 virtual reality set. As traditional stimuli were used animations displayed on the LCD monitor screen. The electronystagmograms registered with a virtual optokinetic stimulation were compared with results obtained using traditional stimulating methods. Additionally, a questionnaire on comfort was conducted among participants of the experiment. To asses the similarity of signals registered using both methods the Pearson correlation coefficient was calculated and the standard deviation. The results of tests showed that electronystagmograms registered during the virtual stimulation were consistent with the records registered during the traditional stimulation. Moreover, the results of the questionnaire on comfort while using a virtual reality headset are very encouraging showing that headset is at least neutral for participants.
4
Content available Fuzzy logic in indoor position determination system
Socha M., Górka W., Kostorz I.
Theoretical and Applied Informatics
|
2015
|
Vol. 27, No. 2
1--15
EN
The article outlines how to use the convergence of collections to determine the position of a mobile device based on the WiFi radio signal strength with the use of fuzzy sets. The main aim is the development of the method for indoor position determination based on existing WiFi network infrastructure indoors. The approach is based on the WiFi radio infrastructure existing inside the buildings and requires operating mobile devices such as smartphones or tablets. An SQL database engine is also necessary as a widespread data interface. The SQL approach is not limited to the determination of the position but also to the creation of maps in which the system dening the position of the mobile device will operate. In addition, implementation issues are presented along with the distribution of the burden of performing calculations and the benets of such an approach for determining the location. The authors describe how to decompose the task of determining the position in a client-server architecture.
5
Content available A preliminary study of the utilization of a low resolution ECG signal from handheld ECG monitor
Kostorz I., Kowalski W., Ludwig Z., Zając J., Piasecki A., Socha M., Górka W.
Journal of Medical Informatics & Technologies
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2015
|
Vol. 24
191--198
EN
The paper presents the preliminary study of the utilization of a low resolution ECG signal analysis. The analysis was performed on the signals obtained from a hand-held ECG monitor usually used in primary health care. The aim. The main aim of the study was a registration of series of data by volunteers within couple of months and determination of signal quality and main ECG parameters as follows: Q, R, S waves, QRS duration as well as the end of PQ and the beginning of ST segment. Additionally, the heart rate variability was determined. Materials and methods. The data was registered by 12 volunteers aged from 35 to 55. The ECG tests were carried out for 7 months. The sample rate of the signal was 100 Hz. To determine the ECG parameters the signal processing and statistical methods was used. Results. The sensitivity of the following ECG parameters were: R wave detection - 99,2 %, Q wave detection - 99,1 %, S wave detection - 99,0 %, QRS duration - 99,2 % respectively.
6
Content available Detection of waves of Auditory Brainstem Responses using IPAN99 algorithm
Kostorz I., Kowalski W., Ludwig Z., Zając J.
Journal of Medical Informatics & Technologies
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2013
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Vol. 22
219--225
EN
The new method of automatic determination the I, III and V waves of Auditory Brainstem Responses is presented in the paper. The brainstem response arises as a result of acoustic stimulation of auditory system. The main aim of the presented study is to analyse an effectiveness of using IPAN99 algorithm for automatic wave I, III and V determination. The presented results of research show that the IPAN99 algorithm combined with time domain constraints can be useful for this application.
7
Content available The method for determining the characteristic points of signatures based on IPAN99 algorithm
Doroz R., Kostorz I.
Journal of Medical Informatics & Technologies
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2010
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Vol. 15
41-46
EN
The paper puts forward a new method of determination of signatures' characteristic points. The method is based on seeking points of the highest curvature using the IPAN99 algorithm. The way of IPAN99 algorithm parameters' automatic selection for a particular signature has been fully described. Moreover, the way of determination of additional characteristic points, important for a signatures analysis, has been shown. The presented results of carried out experiments confirm that the proposed method is useful for signature recognition and verification.
8
Identyfikacja procesu wzbogacania węgla w osadzarce
Cierpisz S., Kostorz I.
Mechanizacja i Automatyzacja Górnictwa
|
2007
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R. 45, nr 11
29-35
PL
W artykule przedstawiono metodę identyfikacji parametrów procesu wzbogacania trójproduktowego oraz charakterystyki wzbogacalności węgla surowego ww. procesu z podziałem na frakcje gęstościowe na przykładzie osadzarki.
EN
There have been presented in the paper at an example of a jig: a method of identification of parameters of a three-product coal preparation process as well as the washability characteristics of raw coal of the above mentioned process classifying.
9
Prognozowanie trwałości ostrzy narzędzi metodą map zużycia - toczenie stali austenitycznej
Dyrbuś G., Kostorz I.
Prace Naukowe Katedry Budowy Maszyn / Politechnika Śląska
|
2004
|
nr 1
247-258
PL
W artykule przedstawiono wyniki badań, których celem jest wygenerowanie mapy zużycia ostrza noża tokarskiego podczas obróbki stali austenitycznej i porównanie wyników z badaniami eksperymentalnymi. W pracy skupiono się głównie na analizie modelu zaproponowanego przez Kannatey-Asibu i przeprowadzeniu dokładnej weryfikacji poszczególnych składników równania. Badaniom poddano dwa rodzaje o płytek narzędziowych wykonanych z węglików spiekanych.
EN
The paper presents results of experimental investigations and analytic investigations of a method of wear maps to predict the rates of tool wear in machining of austenitic steel. The main focus of these investigations was analysing of Kannatey-Asibu model and accurately verification of particular components of this equation. Two kinds of tipped tools and tips made of two different sintered carbides were used.
10
Content available A fast speech data files transmission by ASCII characters in-coding
Pawełczyk P., Kostorz I.
Journal of Medical Informatics & Technologies
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2004
|
Vol. 8
II21--24
EN
This note shortly describes the system of a fast transmission of oral data files that are converted into ASCII characters. These files are using lower capacity the transmission capacity of the communication virtual data links.
11
Mapy zużycia jako metoda określania szybkości zużywania się ostrzy narzędzi skrawających
Kostorz I., Pierchała M.
Prace Naukowe Katedry Budowy Maszyn / Politechnika Śląska
|
2003
|
nr 1
201-212
PL
W pracy zawarto wyroki badań eksperymentalnych oraz badań analitycznych nad metodą map zużycia do prognozowania szybkości zużywania się narzędzi skrawających przy toczeniu stali austenitycznej narzędziami wykonanymi ze stali szybkotnącej. Badania te są kontynuacją rozważań zawartych w pracach [8] i [11].
EN
The paper presents results of experimental investigations and analytic investigations of a method of wear maps to predict the Tales of tool wear in machining of austenitic steel. The methodology is based on research of Lim et al. [9]. They defined the wear map so that the data (wear Tales and wear mechanisms) could be translated onto the map. Two machining parameters, namely feed rate and cutting speed, were chosen because it was suggested that wear of cutting tools depend mainly on them. The conventional definition off1ank wear VB (in millimeters) was adopted. Each point on the two dimensional plane defined by feed rate and cutting speed represents a particular machining condition; a value (logl0(VB/cutting distance" indicates the wear rate measured under that condition is then shown next to this point. The HS 6-5-2-5 (ISO 4957-1980) tool material was used, because such steel still bas large participation on market, carrying out about 30 % and a reasonably large amount of machining data is available in technical literature. Tipped tools are used in research. The workpiece material is hot- rolled austenitic steel 00HI8N9 (X5CrNil810 according to DIN), because it is very popular material and bas a number of defects; mainly bas bad machinability. These investigations are a continuation of works [8] and [11].
12
Content available Advanced interfaces for remote users of network multimedia databases
Piecha J., Kostorz I., Pawełczyk P.
Journal of Medical Informatics & Technologies
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2003
|
Vol. 5
MI129--136
EN
The multimedia databases organisation and management needs various standardisation for simplifying their structure and access methods. They allow integrating different levels and different techniques of programming. The paper describes several aspects of Medical Centre Services organisation that offers various services via Internet standards. Several multimedia systems for training processes have been implemented in this package for network information content development and distribution.
13
Badania nad metodą "map zużycia" potrzeb trwałości narzędzi skrawających
Kostorz I.
Prace Naukowe Katedry Budowy Maszyn / Politechnika Śląska
|
2001
|
nr 2
197-214
PL
W pracy zawarto wyniki badań eksperymentalnych nad metodą map zużycia do prognozowania szybkości zużywania się narzędzi skrawających przy toczeniu stali austenitycznej narzędziami wykonanymi ze stali szybkotnącej. Badania te są kontynuacją rozważań zawartych w pracach [1] i [2].
EN
The present work contains experimental investigations on method of wear maps to predict the rates of tool wear in machining of austenitic steel. These investigations are continuation works [1 ] and [ 2 ].
14
Multimedia database structure available in intranet node
Kostorz I., Pawełczyk P., Bargielski M.
Journal of Medical Informatics & Technologies
|
2001
|
Vol. 2, Part. 1
MI163--MI168
EN
The network databases structure makes various difficulties with accessibility and information flow. The fundamental solution for such problems is to adjust the database structure to the user requirements. For medical applications the database may contain some multimedia content that additionally complicates data searching and transmission. The most important issue for network database is the security of data records. The database system has to launch the task of access protection and access limitation of legalised users. This paper treats about the multimedia database structure available in the intranet node.
15
Zastosowanie map zużycia do optymalizacji wiercenia stali austenitycznych
Kostorz I.
Prace Naukowe Katedry Budowy Maszyn / Politechnika Śląska
|
1999
|
nr 2
123-136
PL
W artykule zaprezentowano analizę literaturową dotyczącą generowania map zużycia reprezentujących prędkość zużycia narzędzia w dwuwymiarowej przestrzeni definiowanej przez warunki skrawania metali. Celem tworzenia map zużycia jest optymalizacja procesu skrawania metodą selekcji najbardziej odpowiednich warunków skrawania, polegająca na badaniu tendencji zużywania się narzędzia.
EN
The paper presents the literature analysis approach to generate wear maps representing the rates of tool wear in a two - dimensional space defined by the machining condition in metal cutting. This approach aims to establish an optimal machining process by selecting the most suitable machining conditions and examine the trends of tool wear.
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