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Search results for: HEMATOCRIT MEASUREMENT
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Optoelectronic device for hematocrit measurements
PublicationAn optoelectronic system for measurements of hematocrit level (HCT) in the whole human blood is presented. Proposed system integrates a dedicated optoelectronic sensor, a microcontroller and a small LCD display in a low cost, battery-powered, handheld device. Chosen method for determining blood hematocrit level is based on optical properties of whole blood in visible and NIR wavelength range. Measurements with the use of proposed...
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Low-coherence method of hematocrit measurement
PublicationW artykule opisano niskokoherencyjna metodę pomiaru hematokrytu krwi.
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Low-coherence method of hematocrit measurement
PublicationDuring the last thirty years low-coherence measurement methods have gained popularity because of their unique advantages. Low-coherence interferometry, low-coherence reflectometry and low-coherence optical tomography offer resolution and dynamic range of measurement at the range of classical optical techniques. Moreover, they enable measurements of the absolute value of the optical path differences, which is still an unsolved problem...
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Spectroscopic and Wireless Sensor of Hematocrit Level
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Spectroscopic wireless sensor of hematocrit level
PublicationAn optical method for hematocrit measurement is presented. The sensor, designed and developed by authors, consists of a spectroscopic set-up and a microcontroller. The work of the sensor is based on measurement of intensity of two selected spectral bands. Tests confirmed the ability of the sensor to determine the hematocrit level with appropriate measurement accuracy. Measurement results can be transmitted via wireless module to...
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Spectroscopic and wireless sensor of hematocrit level
PublicationAn optical method for hematocrit measurement has been presented. the sensor, designed and developed by authors, consists of spectroscopic set-up controlled by a microcontroller. measurement results are sent via wireless module. experiment has confirmed the ability of the sensor to determine the hematocrit with appropriate measurementaccuracy.
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Optical Investigation of Hematocrit Level in Human Blood
PublicationW artykule przedstawiono możliwości wykorzystania metod optoelektronicznych, takich jak: spektroskopia Ramana i interferometria niskokoherencyjna do pomiaru poziomu hematokrytu ludzkiej krwi.
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Response of a New Low-Coherence Fabry-Perot Sensor to Hematocrit Levels in Human Blood
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Response of a New Low-Coherence Fabry-Perot Sensor to Hematocrit Levels in Human Blood
PublicationIn this paper, a low-coherence Fabry-Perot sensor with a spectrally measured signal processing response to the refractive index of liquids is presented. Optical fiber sensors are potentially capable of continuous measuring hematocrit levels in blood. Low-coherence Fabry-Perot interferometric sensors offer a robust solution, where information about the measurand is encoded in the full spectrum of light reflected from the sensing...
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Optimization of a Fabry-Perot Sensing Interferometer design for an optical fiber sensor of hematocrit level
PublicationContinuous measurement of the hemato crit level in blo o d can p otentially b e p erformed using optical bre sensors. The FabryPerot interferometric sensors are a promising candidate in this application. The most imp ortant step in the design of the sensor is design of the sensing interferometer. Adequate cavity length and high interference contrast are two most imp ortant requirements in this application. The design metho d of...
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The issue of uncertainty of visual measurement techniques for long distance measurements based on the example of applying electric traction elements in diagnostics and monitoring
PublicationRail transport is the most economical and energy-effective in the field of land transport, in particular electrified. In order to ensure efficient and reliable operation of electrified rail transport, the issues of monitoring and diagnostics of the traction infrastructure and vehicles are extremely important. The most critical point in the transmission of electric energy to the vehicle is the sliding contact of the current collector...
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Revisiting the Measurement of Anomie
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MEASUREMENT OF NOISE IN SUPERCAPACITORS
PublicationA developed method and measurement setup for measurement of noise generated in a supercapacitor is presented. The requirements for noise data recording are considered and correlated with working modes of supercapacitors. An example of results of low-frequency noise measurements in commercially available supercapacitors are presented. The ability of flicker noise measurements suggests that they can be used to assess quality of tested supercapacitors.
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Comparison of the tests for equivalence of the measurement methods for measurement of PM10 dust in ambient air
PublicationThe paper presents the motives for conducting the equivalence tests and the reasons of discrepancies between the results of PM10 dust concentration obtained via the reference method and the methods based on 'on-site' measurement. The reference and non-reference methods of measurement of PM10 dust concentration in air have been discussed. Field tests for equivalence, following the Polish standard and the European Union (EU) guidelines,...
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Field measurements
PublicationThe article presents the scope and methodologies used in the course of geodetic measurements accompanying archaeological excavations in the area of the Wisłoujście Fortress in Gdańsk
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A method of two-terminal excess noise measurement with a reduction of measurement system and contact noise
PublicationPrzedstawiono metodę i system do pomiaru szumów nadmiarowych dwójników elektrycznych ze znaczną redukcją wpływu szumów własnych systemu pomiarowego i szumów kontaków. Proponowana metoda może byc zastosowana do pomiaru szumów elementów z wyprowadzonymi końcówkami, bądź też struktur, gdy jako wzorcowy szum odniesienia może zostać zastosowany szum struktury rezystywnej wytworzonej bezpośrednio na strukturze w otoczeniu elementu testowanego.
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The prototype of a wireless measurement card
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Air Pollutant Emission Measurement
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Spikes removal in surface measurement
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Designing a magnetoacoustic emission measurement configuration for measurement of creep damage in power plant boiler tubes
PublicationOpisywane są własności skonstruowanego detektora emisji magneto-akustycznej (EMA) służącego dla pomiaru stopnia degradacji rurociągów w przemyśle energetycznym. Specjalna budowa biegunów magnesu umożliwia ich dopasowanie do zakrzywionych powierzchni. Układ pomiarowy pozwala na badanie natężenia EMA dla pola wzdłuż osi rury, a także w kierunku obwodowym. Wykazano, iż możliwa jest detekcja zmiany stopnia degradacji materiału na obwodzie...
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Method and measurement system for DC characteristics measurement of power diodes in very wide current range
PublicationW artykule przedstawiono układ pomiarowy do pomiaru charakterystyk stałoprądowych diod. Pomiar przeprowadzany jest metodą impulsową w celu zapewnienia stałej temperatury badanego elementu w trakcie pomiaru. Do zapewnienia odpowiedniej liczby punktów pomiarowych wykorzystano układ zmodyfikowanej drabinki R2R z pojedynczymi kluczami sterującymi.
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Linearization in impedance measurements
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Stochastic resonance in measurements
PublicationNoise is usually associated with the negative phenomenon, hampering the measurements data and their analysis. This view has been broken in the '80s when the phenomenon of stochastic resonance (Stochastic Resonance - SR) was discovered. It is a phenomenon that occurs in nonlinear dynamic measurement systems when the selected input noise can optimize system performance. SR became a way to improve efficiency of weak signals detection....
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HYDROACOUSTIC NOISE MEASUREMENTS
PublicationThe paper deals mainly with investigation of underwater noise that propagation is in shallow water. In this paper has been presented the experimental investigation results concerning the distribution of the sound field pressure generated by moving ships in the shallow water at the small distance from the ship. The main acoustical characteristics describing features of the field are spectrograms in pseudo 3D system – distance and frequency...
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Measurement of complex refractive index of human blood by low-coherence interferometry
PublicationIn this article, the usefulness of the optical technique for measurements of blood complex refractive index has been examined. Measurement of optical properties of human blood is difficult to perform because of its nonuniform nature. However, results of my investigation have shown the usefulness of low-coherencei nterferometry for measurement complex refractive index of human blood. Furthermore, mathematical analysis of spectrum...
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Four-state measurement method for direct-reading noise figure measurement of low-gain two-ports.
PublicationOmówiono problemy techniczne pomiaru współczynnika szumu dwuwrotników o małym wzmocnieniu mocy dysponowanej realizowanych przy stosowaniu znanych metod pomiaru współczynnika szumu. Przedstawiono nową czterostanową metodę pomiaru umożliwiającą uniezależnienie wskazań automatycznego miernika współczynnika szumu zarówno od wartośći wzmocnienia dwuwrotnika badanego jak i współczynnika szumu odbiornika pomiarowego. Wyprowadzone zależności...
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Influence of vision measurement system spatial configuration on measurement uncertainty, based on the example of electric traction application
PublicationTechnical diagnostics plays a significant role in ensuring operational reliability of electrified rail transport. The most critical point in the transmission of electric energy to vehicles is the sliding contact of the current collector with the traction network. For this reason, work is currently being carried on new measuring methods, whose appliance allows for more complete diagnostics of the contact line and current collectors,...
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Effect of Time Varying Measurement Conditions on Antenna Pattern in Near Field Measurement and Its Correction Procedure
PublicationAuthors present the procedure of taking into account the changes of electrical parameters of setup due to the time drift of temperature during the procedure of near field measurement. It is proposed to make additional measurements in determined positions of probe are next used the results to introduce corrections terms in measured data. Such approach was verified practically in experimental near field measurement system.
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Measurement of Latency in the Android Audio Path
PublicationThis paper provides a description of experimental investigations concerning comparison between the audio path characteristics of various Android versions. First, information about the changes in each system version in the context of latency caused by them is presented. Then, a measurement procedure employing available applications to measure latency is described comparing to results contained in the Internet. Finally, a comparison...
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The problem of “spectrum leakage” in the measurement of harmonics
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Measurement of corporate reputation as perceived by investors
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Measurement cell - current density analysis.
PublicationW pracy przedstawiono model celki do pomiarów elektrycznych parametrów szkliwa i innych tkanek zęba. Wyniki otrzymano za pomocą metody elementu skończonego. Wykazano, że możliwa do osiągnięcia dokładność pomiaru jest zdeterminowana przez prąd upływu celki.
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On-line measurement of wood surface smoothness
PublicationThe latest progress in the field of optics and microelectronics resulted in development of new generation vision systems capable of scanning surface topography with very high sampling frequencies. The blue color of illuminating light as well as novel systems for controlling ultra-thin laser line thickness allows measurement of the porous surface of wood with a triangulation method. Three alternative sensors were tested here in...
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Application of spectroscopy to the measurement of blood parameters
PublicationSpectroscopy is the study of formation and interpretation of the spectra arising from the interactions of all types of radiation on matter, understood as a collection of atoms and molecules. This is a very important department of optics which gives us many opportunities to measure various parameters such as material blood parameters. Among the diseases that are associated significantly with changes in rheological properties of...
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A measurement system for children endurance tests
PublicationThere are a lot of ethical problems concerning the use of invasive methods for the measurement of a child's body response to physical exercise and physical training. The alternative is are non-invasive methods like ergospirometry or NIRS. The article presents a measurement system dedicated for children endurance tests, composed of a few non-invasive measurement modules, including a temperature measurement module. Temperature is...
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Measurement of surface flatness after lapping
PublicationPrzedstawiono sposób pomiaru płaskości powierzchni w docieraniu z wykorzystaniem metody sztucznych baz Vickersa. W analizie wykorzystano skomputeryzowane stanowisko do badań mikroskopowych, wyposażone w mikroskop stereoskopowy, kamerę CCD oraz program MultiScan.
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Discrete measurement of fault-arc velocity
PublicationOpisano metodę dyskretnego pomiaru prędkości jednofazowego łuku awaryjnego poruszającego się w płaskim, poziomym układzie szyn. Badania przeprowadzono za pomocą punktowych czujników optycznych rozmieszczonych równomiernie wzdłuż szyn. Podano opis układu, jego charakterystykę, wpływ obszaru zjonizowanego na uzyskiwane wyniki i zależności między obserwowanymi wielkościami.
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Measurement of dileptons with the CBM experiment at FAIR
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Measurement techniques of tailored optical fibers
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Balance recognition on the basis of EEG measurement.
PublicationAlthough electroencephalography (EEG) is not typically used for verifying the sense of balance, it can be used for analysing cortical signals responsible for this phenomenon. Simple balance tasks can be proposed as a good indicator of whether the sense of balance is acting more or less actively. This article presents preliminary results for the potential of using EEG to balance sensing....
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Measurement platform for training of electronic nose
PublicationW pracy zaprezentowano platformę do badania elektronicznego nosa. Zaproponowane rozwiązanie umożliwia trening elektronicznego nosa oraz pomiar charakterystyk czujników gazów.
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Reducing the Uncertainty of the Moving Object Location Measurement with the Method of Quasi-Multiple Measurement in GNSS Technology in Symmetrical Arrangement
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Reducing the Uncertainty of the Moving Object Location Measurement with the Method of Quasi-Multiple Measurement in GNSS Technology in Symmetrical Arrangement
PublicationThe article presents a solution to the problem of limited accuracy of dynamic measurements performed with GNSS receivers. The proposed measurement method is a response to the needs related to the assessment of the measurement uncertainty of the position of the track axis of the rail transport line. However, the problem of reducing the measurement uncertainty is universal for many different situations where high accuracy of positioning...
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USE OF LANGMUIR PROBE IN DIESEL ENGINE DIAGNOSTIC RESEARCH Part I MEASUREMENT TECHNOLOGY. - Part 1 : MEASUREMENT TECHNOLOGY
PublicationIn the paper, the basic assumptions of diesel engine cylinder system's diagnosing method, based on observation of emerging and moving electric charges of ionized gas in the combustion workspaces, using Langmuir's probe. In the first part of the paper, only the technology of the measurement and results of the preliminary diagnostic tests of laboratory engine Farymann Diesel D10 were presented. The primary purpose of the research...
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Measurements of Subnanometer Molecular Layers
PublicationSelected methods of formation and detection of nanometer and subnanometer molecular layers were shown. Additionally, a new method of detection and measurement with subnanometer resolution of layers adsorbed or bonded to the gate dielectric of the ion selective field effect transistor (ISFET) was presented.
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Measurements of relative frequency instability
PublicationFrequency constancy can be determined by the change in time for the subsequent periods. The article shows that classical the method of digital period measurement is not suitable for the measurement process. Therefore, a method using an integrating circuit is being proposed. Errors in the measurement of the given method have been analyzed.
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Measurements of the Hydraulic Fluids Compressibility
PublicationPerformance of the hydrostatic high-pressure drive systems is affected by the changes of working fluid’s volume. Presence of air bubbles in the fluid cause this problem to be even more serious. To study this phenomenon precise measurements of fluid’s bulk modulus are necessary. Differ-ent measurement methods are applied, but they are either limited to low pressure range or give inaccurate results. To solve the problem the new...
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Mobility measurements in oxide semiconductors
PublicationPraca zawiera wyniki badań właściwości elektrycznych, optycznych i strukturalnych cienkich warstw ito i sno2. badania wykazały, że cienkie warstwy tlenków metali wykazują rezystywność charakterystyczną dla półprzewodników. poziom transmisji światła w zakresie widzialnym pozwala zaliczyć badane warstwy do materiałów przezroczystych. badane cienkie warstwy wykonano metodą rozpylania magnetronowego.
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Speech Intelligibility Measurements in Auditorium
PublicationSpeech intelligibility was measured in Auditorium Novum on Technical University of Gdansk (seating capacity 408, volume 3300 m3). Articulation tests were conducted; STI and Early Decay Time EDT coefficients were measured. Negative noise contribution to speech intelligibility was taken into account. Subjective measurements and objective tests reveal high speech intelligibility at most seats in auditorium. Correlation was found between...
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Reliability of Pulse Measurements in Videoplethysmography
PublicationReliable, remote pulse rate measurement is potentially very important for medical diagnostics and screening. In this paper the Videoplethysmography was analyzed especially to verify the possible use of signals obtained for the YUV color model in order to estimate the pulse rate, to examine what is the best pulse estimation method for short video sequences and finally, to analyze how potential PPG-signals can be distinguished from...