Relevant bibliographies by topics / Potentiometry. Water Electronic measurements

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Potentiometry. Water Electronic measurements'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Potentiometry. Water Electronic measurements"

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Deleebeeck, Lisa, Alan Snedden, Dániel Nagy, Zsófia Szilágyi Nagyné, Matilda Roziková, Martina Vičarová, Agnes Heering, et al. "Unified pH Measurements of Ethanol, Methanol, and Acetonitrile, and Their Mixtures with Water." Sensors 21, no. 11 (June 7, 2021): 3935. http://dx.doi.org/10.3390/s21113935.

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Measurement of pH in aqueous-organic mixtures with different compositions is of high importance in science and technology, but it is, at the same time, challenging both from a conceptual and practical standpoint. A big part of the difficulty comes from the fundamental incomparability of conventional pH values between solvents (spH, solvent-specific scales). The recent introduction of the unified pH (pHabs) concept opens up the possibility of measuring pH, expressed as pHabsH2O, in a way that is comparable between solvent, and, thereby, removing the conceptual problem. However, practical issues remain. This work presents the experience of the authors with measuring pHabsH2O values in mixtures of methanol, ethanol, and acetonitrile, with water, but without the presence of buffers or other additives. The aim was to assigned pHabsH2O values to solvent–water mixtures using differential potentiometry and the ‘pHabs-ladder’ method. Measurements were made of the potential difference between glass electrodes immersed in different solutions, separated by an ionic liquid salt bridge. Data were acquired for a series of solutions of varying solvent content. This work includes experiences related to: a selection of commercial electrodes, purity of starting material, and comparability between laboratories. Ranges of pHabsH2O values for selected compositions of solvent–water mixtures are presented.
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Wiora, J., A. Kozyra, and A. Wiora. "Towards automation of measurement processes of surface water parameters by a remote-controlled catamaran." Bulletin of the Polish Academy of Sciences Technical Sciences 65, no. 3 (June 27, 2017): 351–60. http://dx.doi.org/10.1515/bpasts-2017-0039.

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AbstractThis paper describes a way of determining selected water parameters using a prototype of a remote-controlled catamaran. The remote controlling allows to steer the boat and to manage the measurement process from the shore. It is possible to monitor the water parameters online as well as to store them and analyze them afterwards. The measured parameters are determined mainly using potentiometric methods and include several ion concentrations. The system is orientated towards monitoring breeding ponds or other similar surface waters. The mechanical construction of the catamaran, its electronic circuits and implemented software are described in detail in the paper. Conclusions obtained from preliminary tests are also included. The described construction allows analysts to perform simple and inexpensive remote measurements or assessments of water quality and reduces the time of such analysis in comparison to traditional sampling.
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Nowak, S., and B. Herod. "The Influence of Lubrication on Electrical and Mechanical Parameters of Potentiometer Resistive Element." Active and Passive Electronic Components 12, no. 1 (1985): 33–40. http://dx.doi.org/10.1155/1985/64056.

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Fixed resistors are usually protected against environmental influences. For this aim, special lacquers are used. Much of the environmental qualities of such a resistor are directly related to its enclosure.The resistive element of the potentiometer cannot be protected in the same way. The producers of quality potentiometers, especially thin film ones, designed an effective seal of their housing but it leads to an increase in production costs.The first researches on thin film resistive elements for potentiometers, proved the major sensitivity of the unit to moisture cycling, because of high water chemisorption on the resistive element surface.The chemisorption effect has the major influence on the temperature coefficient of resistance (TCR), because at a higher temperature, water desorption is occuring and the resistance of the film is undergoing a change.However, the IEC Standard recommends dry out of resistive elements before TCR measurement; the potentiometer users feel that total resistance changes as a sum of temperature change and drying out change.The present paper deals with trials to eliminate this disadvantage of thin film potentiometers by protection against moisture.The protective coating should, because of its affinity to the resistive film, form durable protection against environmental influences, but should not increase the contact resistance of the wiper (CRV). Such a coating also should not increase the friction coefficient of the wiper.To verify the hypothesis that polar lubricants can play a part in protective coating of thin film potentiometers, several different lubricants have been examined.
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Ghalami-Choobar, Bahram, and Mohsen Mohammadian. "Thermodynamic modeling of the KCl+glucose+water system based on potentiometric measurements at 298.15K." Journal of Molecular Liquids 154, no. 1 (July 2010): 26–30. http://dx.doi.org/10.1016/j.molliq.2010.03.008.

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Thuy, Nguyen Thi Dieu, Xiaochan Wang, Guo Zhao, Tingyu Liang, and Zaihan Zou. "A Co3O4 Nanoparticle-Modified Screen-Printed Electrode Sensor for the Detection of Nitrate Ions in Aquaponic Systems." Sensors 22, no. 24 (December 12, 2022): 9730. http://dx.doi.org/10.3390/s22249730.

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In this study, a screen-printed electrode (SPE) modified with cobalt oxide nanoparticles (Co3O4 NPs) was used to create an all-solid-state ion-selective electrode used as a potentiometric ion sensor for determining nitrate ion (NO3−) concentrations in aquaculture water. The effects of the Co3O4 NPs on the characterization parameters of the solid-contact nitrate ion-selective electrodes (SC-NO3−-ISEs) were investigated. The morphology, physical properties and analytical performance of the proposed NO3−-ion selective membrane (ISM)/Co3O4 NPs/SPEs were studied by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), potentiometric measurements, and potentiometric water layer tests. Once all conditions were optimized, it was confirmed that the screen-printed electrochemical sensor had high potential stability, anti-interference performance, good reproducibility, and no water layer formation between the selective membrane and the working electrode. The developed NO3−-ISM/Co3O4 NPs/SPE showed a Nernstian slope of −56.78 mV/decade for NO3− detection with a wide range of 10−7–10−2 M and a quick response time of 5.7 s. The sensors were successfully used to measure NO3− concentrations in aquaculture water. Therefore, the electrodes have potential for use in aquaponic nutrient solution applications with precise detection of NO3− in a complicated matrix and can easily be used to monitor other ions in aquaculture water.
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Deyhimi, Farzad, and Bahram Ghalami-Choobar. "Determination of activity coefficients for NH4Cl in 1-propanol/water mixed solvents by potentiometric measurements." Journal of Molecular Liquids 122, no. 1-3 (November 2005): 116–20. http://dx.doi.org/10.1016/j.molliq.2005.03.004.

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Yağmuroğlu, Ozan. "Molecularly Imprinted Polymer Based Potentiometric Sensor for the Selective and Sensitive Detection of Nerve Agent Simulant Parathion." Defence Science Journal 72, no. 3 (July 1, 2022): 343–52. http://dx.doi.org/10.14429/dsj.72.17625.

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In this study, a potentiometric sensor was developed for the analysis of the parahtion which is a nerve agent simulant and pesticide. A molecularly imprinted polymer was used as the recognition layer in the electrode used in the potentiometric sensor. Parathion is also used as both an organophosphorus pesticide and a nerve agent simulant. For this reason, analysis methods to be developed for parathion are very important. The most important advantages brought by MIP-based sensor systems are; fast analysis, sensitive analysis, and the ability to analyze at very low concentrations. The sensor developed in our study was validated for parathion adsorption. In our study, first, Parathion imprinted polymers were synthesized. The synthesized MIPs are used as the recognition layer in the potentiometric sensor. The characterization of parathion imprinted polymers was done by FESEM, FT-IR, and zeta-sizer measurements. Optimization of the working conditions was carried out for the developed sensor system. The working pH was found to be 7.4.Measurements were taken for parathion samples with different concentrations under optimum operating conditions. When the results obtained were examined, a large linear range (10-8-10-4 mol L-1) and a satisfying detection limit against parathion (1.86 × 10-8 mol L-1) were calculated. Interference effect analysis was carried out within the scope of the performance tests of the potentiometric sensor. The analysis showed that interference did not affect the experimental results. In order to examine the matrix effect of the real sample environment, analyses were carried out in tap water and lake water. The recovery values in the analysis results are quite good. The results of the experiments show that the sensor we have developed can be used successfully in complex matrix environments.
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Uppuluri, Kiranmai, Maryna Lazouskaya, Dorota Szwagierczak, Krzysztof Zaraska, and Martti Tamm. "Fabrication, Potentiometric Characterization, and Application of Screen-Printed RuO2 pH Electrodes for Water Quality Testing." Sensors 21, no. 16 (August 10, 2021): 5399. http://dx.doi.org/10.3390/s21165399.

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Screen-printed sensing electrodes attract much attention for water pollution monitoring due to their small size, physical and chemical durability, and low cost. This paper presents the fabrication and broad potentiometric characterization of RuO2 pH sensing electrodes deposited by screen printing on alumina substrates and sintered in the 800–900 °C temperature range. All the fabricated electrodes showed close to Nernstian sensitivity, good linearity, fast response, small drift, low hysteresis, and low cross-sensitivity toward various interfering cations and anions. Furthermore, decreasing the sintering temperature led to better adhesion of the RuO2 layer and a negligible response to interfering ions. The measurements in real-life samples from different water sources showed that the fabricated electrodes are on par with conventional glass electrodes with a maximum deviation of 0.11 pH units, thus indicating their potential for application in water quality monitoring.
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Bressi, Viviana, Zahra Akbari, Morteza Montazerozohori, Angelo Ferlazzo, Daniela Iannazzo, Claudia Espro, and Giovanni Neri. "On the Electroanalytical Detection of Zn Ions by a Novel Schiff Base Ligand-SPCE Sensor." Sensors 22, no. 3 (January 25, 2022): 900. http://dx.doi.org/10.3390/s22030900.

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A novel bidentate Schiff base (L) is here proposed for the detection of Zn ions in water. The structure of the synthesized Schiff base L was characterized by FT-IR, 1H NMR and 13C NMR. Optical characteristics were addressed by UV-Visible spectroscopy and Photoluminescence (PL) measurements. PL demonstrated that L displays a “turn-off” type fluorescence quenching in the presence of Zn2+ ion in aqueous solution, indicating its ability to preferentially coordinate this ion. Based on these findings, an L-M (where M is a suitable membrane) modified screen-printed carbon electrode (SPCE) was developed to evaluate the electrochemical behavior of the Schiff base (L) with the final objective of undertaking the electroanalytical determination of Zn ions in water. Using various electrochemical techniques, the modified L-M/SPCE sensor demonstrates high sensitivity and selectivity to Zn ions over some common interferents ions, such as Ca2+, Mg2+, K+, Ni++ and Cd++. The potentiometric response of the L-M/SPCE sensor to Zn ions was found to be linear over a relatively wide concentration range from 1 μM to 100 mM.
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Darestani-Farahani, Maryam, Ponnambalam Ravi Selvaganapathy, and Peter Kruse. "Development of Solid-State Chemiresistive Devices for Simultaneous Detection of Nitrate, Nitrite and Ammonium Ions in Aqueous Solutions." ECS Meeting Abstracts MA2022-01, no. 52 (July 7, 2022): 2139. http://dx.doi.org/10.1149/ma2022-01522139mtgabs.

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The presence of various ions is an important factor in evaluating water quality. Nitrate, nitrite and ammonium in water can cause health issues and pose environmental concerns1,2. Some sources of the nitrogen species are from natural water and some of them arise from industrial and agricultural activities. Currently commercially available sensors for measuring nitrogen compounds in water are based on colorimetric techniques and potentiometric methods incorporating ion selective electrodes. Progress still needs to be made towards fabricating devices with less instrumentation costs, less complexity, less maintenance and without need for any reagents to facilitate measurement of species1. Chemiresistive sensors are solid-state devices which can be simply fabricated from two contacts and a conductive sensing material affixed on a suitable substrate. They operate by detecting modulations in resistance of the conducting film due to surface charge transfer as a result of interactions with the analyte(s)3. Here, we demonstrate chemiresistive devices capable of quantifying aqueous nitrate, nitrite and ammonium ions selectively. Due to challenges in the aqueous phase such as ionic strength effect, probability of side reactions, non-specific bonding on the surface, low interaction energy between analyte and surface, chemiresistive technology has not been developed extensively in water quality sensors4,5. In this study, we have overcome the issues in water by coating the chemiresistive devices with selective membranes. If the fabricated sensors are used as an array, the total nitrogen concentration in water can be measured online which is a significant advance since nitrate, nitrite and ammonium may interconvert and a single nitrate, nitrite or ammonium sensor by itself cannot give the total amount of nitrogen in a sample. For device fabrication, p-doped carbon nanotubes were selected as a sensitive conductive layer which were modified with selective membranes to improve the sensing performance. Nitrite sensors worked over a dynamic range of 67 ppb to 67 ppm with a 27.6% response at 67 ppm. Nitrate showed 13.2% response from 2.2 ppm to 220 ppm. Ammonium devices operated over a dynamic range of 10 ppb to 100 ppm with a 23.6% response at 100 ppm. The proposed response mechanism involves both an electrostatic gating effect and surface charge transfer. Compared with paper-based colorimetric sensors, the proposed devices perform better with a lower detection limit and the ability to perform continuous online measurements. Moreover, the chemiresistive responses of the devices were compared with their potentiometric responses and found to be equally sensitive but more selective. Unlike ion-selective electrodes, the resulting devices do not require the use of reference electrodes and are therefore potentially more robust for use in continuous water analyzers and in resource-poor settings. The chemiresistive devices showed low interferences and good reversibility. They were also tested in river water samples and showed satisfactory results. The fabricated devices are an advanced proof of concept and have the potential to replace the current technology. Nuñez, L., Cetó, X., Pividori, M. I., Zanoni, M. V. B. & del Valle, M. Development and application of an electronic tongue for detection and monitoring of nitrate, nitrite and ammonium levels in waters. Microchem. J. 110, 273–279 (2013). Li, D., Xu, X., Li, Z., Wang, T. & Wang, C. Detection methods of ammonia nitrogen in water: A review. TrAC - Trends Anal. Chem. 127, 115890 (2020). Choi, S. J. & Kim, I. D. Recent Developments in 2D Nanomaterials for Chemiresistive-Type Gas Sensors. Electronic Materials Letters vol. 14 (The Korean Institute of Metals and Materials, 2018). Kruse, P. Review on water quality sensors. J. Phys. D. Appl. Phys. 51, (2018). Dalmieda, J., Zubiarrain-Laserna, A., Saha, D., Selvaganapathy, P. R. & Kruse, P. Impact of Surface Adsorption on Metal-Ligand Binding of Phenanthrolines. J. Phys. Chem. C 125, 21112–21123 (2021). Figure 1
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Dissertations / Theses on the topic "Potentiometry. Water Electronic measurements"

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Sahara, Emmy. "Stripping potentiometric determination of trace metals in environmental materials /." View thesis, 1996. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030822.171402/index.html.

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Sahara, Emmy. "Stripping potentiometric determination of trace metals in environmental materials." Thesis, View thesis, 1996. http://handle.uws.edu.au:8081/1959.7/29143.

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This thesis describes the development and application of stripping potentiometric methods for reliable determination of some trace metals in natural waters on a glassy carbon mercury film electrode (GCMFE). The development of these methods involved investigation of factors influencing the stripping potentiometric measurement, such as selection of adequate supporting electrolyte, choice of pH and/or concentration of supporting electrolyte, oxidant concentration, deposition potential, deposition time, stirring or sample rotation rate and equilibrium period. Moreover, the influence of complexing agents and the magnitude of constant current were carefully investigated for adsorptive cathodic stripping potentiometric methods. In addition, linear concentration range and detection limits were considered. The analytical application of the method to some natural waters was also demonstrated. It is concluded that the stripping potentiometric methods developed in this study are adequate for ultra-trace determination of copper, lead, cadmium, zinc, nickel and molybdenum. The methods provide very simple procedures, excellent precision and accuracy for the reliable determination of the six metals in natural water samples.
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Rivord, Jeremy. "Modeling contaminant spills on the upper Truckee River in CA and NV." abstract and full text PDF (UNR users only), 2008. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1456401.

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Rajagopal, Seshadri. "Development and evaluation of a streamflow forecasting tool to improve reclamation operational water supply forecasts in the Carson River /." abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1440929.

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Thesis (M.S.)--University of Nevada, Reno, 2006.
"Fall, 2006." Includes bibliographical references (leaves 66-67). Online version available on the World Wide Web. Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2006]. 1 microfilm reel ; 35 mm.
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Björnham, Oscar, and Tobias Sundqvist. "Measuring and modelling of humidity penetration in an electronic control unit." Thesis, Umeå University, Department of Physics, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-35150.

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Real world modeling has become a very useful tool when new designs and applications are tested before they are introduced on the market. A field that recently has discovered the possible use of modeling is reliability prediction. The reliability and lifetime of a component has until recently been based on months and years of testing. In order to shorten the test time it is possible to simulate the environmental effect on the components. Another advantage of modeling is that changes of large systems where many different components work together can easily be studied. Without modeling the reliability has to be tested over and over again if the system is redesigned since it is impossible to know how the new change will affect the reliability.

Since electronic circuits are being made smaller and smaller with the increasing demand of faster technology the circuits are very vulnerable to corrosion. A trend in the automotive industry is also to move the electronic devices from the benign environment in the cab to the hash environment on the driveline or the chassi. The most common way to protect the electronics from the hash environment is to put it into a protective covering, also called Electronic Control Unit (ECU). Even though the ECU is sealed, water can still enter the ECU in several ways and cause serious damages by corrosion. The corrosion rate of a component is among others depending of the environmental humidity and temperature. Knowing the humidity and temperature are therefore very important to be able to eliminate corrosion problems. In order to achieve a better understanding of the physics behind the failure and to improve the reliability of the ECU a model of the temperature and humidity penetration is built in this thesis.

There are several components in the ECU which all responds differently to water vapour. By measuring the humidity penetration in the ECU while components were added one by one, the physical properties of the components could be determined. Some properties were also determined through additional solubility measurements. The humidity penetration of the ECU is then predicted by inserting these properties into mathematical models in SimulinkÓ.

The conclusion is that it is possible to model the humidity penetration and the temperature changes in the ECU. After the physical properties of the components were determined, the diffusion model agreed well with measurements. The numerical method used in this thesis has been found to be fast and stable. The length of the time-steps has been varied from a couple of minutes to more than an hour in the numerical model. A few physical properties has to be examined more in detailed and the model is then going to be a good foundation on which corrosion and other damaging processes can be modelled.

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Garner, Christopher B. "Modeling the effect of riparian shading on water temperature for portions of the Carson River, western Nevada, USA." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1442841.

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Sahara, Emmy, University of Western Sydney, and Faculty of Science and Technology. "Stripping potentiometric determination of trace metals in environmental materials." 1996. http://handle.uws.edu.au:8081/1959.7/29143.

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This thesis describes the development and application of stripping potentiometric methods for reliable determination of some trace metals in natural waters on a glassy carbon mercury film electrode (GCMFE). The development of these methods involved investigation of factors influencing the stripping potentiometric measurement, such as selection of adequate supporting electrolyte, choice of pH and/or concentration of supporting electrolyte, oxidant concentration, deposition potential, deposition time, stirring or sample rotation rate and equilibrium period. Moreover, the influence of complexing agents and the magnitude of constant current were carefully investigated for adsorptive cathodic stripping potentiometric methods. In addition, linear concentration range and detection limits were considered. The analytical application of the method to some natural waters was also demonstrated. It is concluded that the stripping potentiometric methods developed in this study are adequate for ultra-trace determination of copper, lead, cadmium, zinc, nickel and molybdenum. The methods provide very simple procedures, excellent precision and accuracy for the reliable determination of the six metals in natural water samples.
Master of Science (Hons)
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Books on the topic "Potentiometry. Water Electronic measurements"

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1956-, Kearns Jeffery R., ASTM Committee G-1 on Corrosion of Metals., and International Symposium on Electrochemical Noise Measurement for Corrosion Applications (1st : 1994 : Montréal, Québec), eds. Electrochemical noise measurement for corrosion applications. West Conshohocken, PA: ASTM, 1996.

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Sauer, Vernon B. Standards for the analysis and processing of surface-water data and information using electronic methods. Reston, Va: U.S. Dept. of the Interior, U.S. Geological Survey, 2003.

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Book chapters on the topic "Potentiometry. Water Electronic measurements"

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Brock, Fred V., and Scott J. Richardson. "Thermometry." In Meteorological Measurement Systems. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195134513.003.0006.

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Air temperature is one of the most fundamental of all meteorological measurements and directly effects our everyday lives. It has been measured for centuries, using countless different techniques. One might assume that accurate air temperature measurements are readily made. Indeed, it is possible to make very accurate air temperature measurements but it can be a remarkably hard task, especially when limitations such as power consumption, reliability, and cost are involved. Errors in the measurement of air temperature in excess of 2 to 3°C are not uncommon in many networks. Errors of this magnitude are generally acceptable for the general public who is most interested in what clothes to wear for the day. However, numerical models at all scales of motion (mesoscale, synoptic scale, or climate models) are greatly affected by errors even as large as 1°C. Errors of just 1°C in a mesoscale model have been shown to be the deciding factor between no storms initiated and intense storms (Crook, 1996). In addition, errors as small as 0.2°C can change the prediction of a global climate model, depending on its dependency on initial conditions (DeFelice, 1998). Measurement of air temperature near the surface of the earth is facilitated by the vast array of temperature sensors and supporting electronic modules that are readily available. Accuracy is limited not by technology but by our ability to use it and by our ability to avoid exposure error, that is, to provide adequate coupling with the atmosphere. The preferred temperature scales are Celsius and Kelvin. These scales can be used almost interchangeably (except when absolute temperature is required) because a temperature difference of 1 K is equal to a temperature difference of 1°C. The Fahrenheit scale is still in general use by the U.S. public. Some common temperature reference points are shown in table 4-1. The triple point of water is the temperature and pressure where all three phases, gas, liquid, and solid, can coexist. Temperature sensors can be categorized according to the physical principle that they use: thermal expansion, thermoelectric, electrical resistance, electrical capacitance and some other effects.
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Conference papers on the topic "Potentiometry. Water Electronic measurements"

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Maas, Hans-Gerd, Bernd Hentschel, and Frank Schreiber. "Optical triangulation method for height measurements on water surfaces." In Electronic Imaging 2003, edited by Sabry F. El-Hakim, Armin Gruen, and James S. Walton. SPIE, 2003. http://dx.doi.org/10.1117/12.473088.

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Mishra, Ashutosh, Paras Pujari, Shalini Dhyani, and Parikshit Verma. "Soil-water dynamics in flood irrigated orange orchard in central India: Integrated approach of sap flow measurements and HYDRUS 1D model." In 5th International Electronic Conference on Water Sciences. Basel, Switzerland: MDPI, 2020. http://dx.doi.org/10.3390/ecws-5-08467.

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Mundlein, M., J. Nicolics, R. Chabicovsky, P. Svasek, E. Svasek, T. Komeda, H. Funakubo, T. Nagashima, and M. Ito. "Packaging of a thin-film sensor for transepidermal water loss measurements." In 26th International Spring Seminar on Electronics Technology: Integrated Management of Electronic Materials Production, 2003. IEEE, 2003. http://dx.doi.org/10.1109/isse.2003.1260544.

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Bharadwaj, Sudarshan P., Michael F. Modest, and Robert J. Riazzi. "Medium Resolution Transmission Measurements of Water Vapor at High Temperature." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72724.

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Medium resolution transmissivities of water vapor were measured at temperatures between 600 K and 1550 K for all important vibration-rotation bands as well as part of the purely rotational band. Measurements were made with an improved drop tube design, which guarantees a truly isothermal high-temperature gas column. Data were collected with an FTIR-spectrometer, allowing for much better spectral resolution than most previous high-temperature measurements. The measured data were compared with the HITEMP database, as well as with the data of Phillips for the 2.7 μm band of H2O. The data show minor discrepancies with the high-resolution database, particularly at higher temperatures, but in general agreement is acceptable.
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Marcela Trindade, Marcela, Andre Andre Ramiro, Antonio Antonio Carlos Fernandes, Fábio Fábio Nascimento, and Marcio D. Marcio D. Maia Junior. "Electronic Instrumentation For Distributed Pressure Measurements On Model Tests." In SNAME 29th American Towing Tank Conference. SNAME, 2010. http://dx.doi.org/10.5957/attc-2010-018.

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Electronic instrumentation applied to small scale tests in ocean basins demands a very specific design, turning the use of commercial equipment a complex and challenging task to adapt these general purpose devices for specific needs. Under this perspective, the aim of the study is to discuss an experimental methodology to get the maximum wave impact pressure due to the slamming occurrence on a floating structure. This was demanded in a model test in the wave basin of LabOceano, COPPE/ UFRJ. The pressure instrumentation was based on a sensor’s grid measurement system. This allowed covering a larger area of the impact region. Due to the necessity of adapting the pressure sensor to an underwater use, all the calibration and mounting procedures, together with the difficulties and solutions will be presented. The importance of the results obtained motivates new tests and the improvement of the calibration and water proofing procedures. This kind of solution may be useful for other kinds of near water surface pressure measurements in ocean basins and towing tanks. The dynamic calibration procedures are very important for future studies. The events to be monitored can sometimes have a high frequency response. This will also be discussed.
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Masot, Rafael, Miguel Alcañiz, Ana Fuentes, Franciny Campos, José M. Barat, Luis Gil, Roberto H. Labrador, et al. "Design and Implementation of a Low-Cost Non-Destructive System for Measurements of Water and Salt Levels in Food Products Using Impedance Spectroscopy." In OLFACTION AND ELECTRONIC NOSE: Proceedings of the 13th International Symposium on Olfaction and Electronic Nose. AIP, 2009. http://dx.doi.org/10.1063/1.3156536.

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Zhang, Jinsong, T. S. Fisher, Jay P. Gore, and P. Veeraraghavan Ramachandran. "Heat of Reaction Measurements of Sodium Borohydride Alcoholysis." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72424.

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On-board hydrogen storage has been identified as one of the most challenging technical barriers to the transition from gasoline to hydrogen powered vehicles. The Hydrogen-On-Demand™ system patented by Millenium Cell Inc. uses sodium borohydride and water to generate hydrogen when needed. The system has many advantages over other types of storage methods such as compressed hydrogen, liquid hydrogen and metal hydrides. Nevertheless, the cost of making and regenerating sodium borohydride is too high. A recently filed patent indicates that sodium borohydride alcoholysis (e.g. using ethylene glycol) may offer some advantages over the aqueous system in terms of regeneration, which may significantly reduce the cost to regenerate sodium borohydride. To begin evaluating the energy efficiency of this new approach, this work experimentally characterizes the heat of reaction of sodium borohydride with ethylene glycol. The heat of reaction was measured to be approximately 220 kJ/mol (exothermic). For the sodium borohydride and water reaction, two different heat of reaction values have been reported in prior literature. The present work shows that the heats of reaction for both sodium borohydride hydrolysis and alcoholysis are both near 220 kJ/mol exothermically.
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8

Chun, Sejong, Hyu-Sang Kwon, Doo-Sik Park, and Kang-Wook Lee. "Acoustic Measurement of Ultrasound Sensors in a Water Bath." In ASME 2020 Fluids Engineering Division Summer Meeting collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/fedsm2020-20046.

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Abstract PMN-PT is one of promising materials for fabrication ultrasound sensors for flow metering, in that the relative permittivity and the dielectric loss factor are superior to PZT, the popular piezoelectric materials at present. However, there are not many studies focusing on characterizing the PMN-PT ultrasound sensors by acoustic measurements. This study introduces an acoustic bath to accommodate a pair of ultrasound sensors for measuring the relative acoustic sensitivity and the dispersion angle by ultrasound waves. Ultrasound sensors with resonance frequencies from 0.2 MHz to 1 MHz are also tested in terms of the relative permittivity, the dielectric loss factor, the electric impedance, and the electric admittance. From these measurements, it is found that PMN-PT is superior to PZT for increasing the relative acoustic sensitivity of ultrasound sensors. Impedance matching electronic circuits are fabricated by designing capacitance and inductance with the reflectance coefficients. Smith chart is used to calculate the capacitance and the inductance for the PMN-PT ultrasound sensors with resonance frequencies of 0.2 MHz and 0.5 MHz. As a results, it is also found that the impedance matching electronic circuits enhance the electrical admittance by 3.6 ∼ 25 times while keeping the electrical impedance between 50 Ω and 100 Ω.
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Foster, R. E., and T. A. Shedd. "PIV Measurements Within the Waves of Wavy and Wavy-Annular Horizontal Two-Phase Flow." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72669.

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A novel technique of microscopic Particle Image Velocimetry (PIV) is presented for two-phase annular, wavy-annular and stratified flow. Seeding of opaque particles in a water/dye flow allows the acquisition of instantaneous film velocity data in the film cross-section at the center of the tube in the form of digital image pairs. An image processing algorithm is also described that allows numerical velocities to be distilled from particle images by commercial PIV software. The approach yields promising results for stratified and wavy-annular flows, however highly bubbly flows remain difficult to image and post-process. Initial data images are presented in raw and processed form.
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Erden, Hamza Salih, and H. Ezzat Khalifa. "Parameter Estimation for Lumped Capacitance Modeling of CRAH Units During Chilled Water Interruption." In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48430.

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Lumped capacitance models have been introduced to study transient thermal response of data centers. Chilled water interruption of a Computer Room Air Handling (CRAH) unit is one of several failure scenarios of data center cooling infrastructures. In such a scenario, predicting the transient thermal response of the CRAH unit depends requires the determination of the CRAH lumped capacitance model parameters: the thermal capacitance (thermal mass) and the time constant. In this paper, we propose an experimental methodology to extract sufficient information for the lumped capacitance modeling of CRAH units. The method requires measurements of inlet and exit air temperature, air flow rate and CRAH fan power. If the chilled water supply to a CRAH unit is intentionally interrupted in a data center with multiple redundant CRAH units, sufficient information to estimate the CRAH lumped capacitance parameters can be obtained without disturbing the data center operation.
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