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Thèses sur le sujet « Measurements and monitoring »

Auteur : Grafiati

Publié le 10 mars 2023

Mis à jour le 31 juillet 2025

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1

Kuhlmann, Volker. "Synchronous measurements and power quality monitoring." Thesis, University of Canterbury. Electrical and Electronic Engineering, 2004. http://hdl.handle.net/10092/6158.

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The task of simultaneous power systems measurements at locations which can be hundreds of kilometres apart carries the problem of precise synchronisation. To introduce this topic, this thesis begins with an overview of time, time stamping and synchronised data acquisition, and reviews its application to power quality monitoring. It then discusses the requirements for such systems and how different application scenarios shift the emphasis between aspects of the requirements. The complexity of a power distribution monitoring system is most dependent on the number of channels and sites which must

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2

Zhou, Ming. "Advanced System Monitoring with Phasor Measurements." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/27813.

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Phasor Measurement Units (PMUs) are widely acknowledged as one of the most promising developments in the field of real-time monitoring of power systems. By aligning the time stamps of voltage and current phasor measurements that are consistent with Coordinated Universal Time (UTC), a coherent picture of the power system state can be achieved through either direct measurements or simple linear calculations. With the growing number of PMUs planned for installation in the near future, both utilities and research institutions are looking for the best solutions to the placement of units as well as

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3

Engelbrecht, André. "Structural integrity monitoring using vibration measurements." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-07032006-122342/.

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4

Al-Haider, Sahailah Ahmed. "Monitoring and modelling direct atmospheric formaldehyde measurements." Thesis, University of Leeds, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436382.

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5

Aaltonen, Jaana. "Ground Monitoring using Resistivity Measurements in Glaciated Terrains." Doctoral thesis, Stockholm : Tekniska högsk, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3177.

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6

CAMERINI, MURILO GIRON. "FLEXIBLE RISERS MONITORING TECHNIQUE BASED ON VIBRATION MEASUREMENTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=20697@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Um dos principais mecanismos de falha em risers flexíveis é o rompimento de arames da armadura de tração. A experiência tem mostrado que esta classe de dano tende a surgir primariamente na parte emersa do riser, próximo à sua terminação. A ruptura dos arames ocorre de forma progressiva, podendo ser causada por diferentes processos, tais como corrosão pelo ingresso de fluido no espaço anular entre capa e armadura, desgaste excessivo associado com o contato e atrito entre arames adjacentes ou entre as diferentes camadas metálicas da armadura,

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7

Halén, Axel. "Cloud Monitoring and observation measurements in OpenStack environment." Thesis, Luleå tekniska universitet, Datavetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70896.

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8

Gerrard, Carl Andrew. "Remote monitoring of power system conductor voltages." Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263990.

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9

Parri, Lorenzo. "Ion current and exhaust gas composition measurements for combustion monitoring." Doctoral thesis, Università di Siena, 2021. http://hdl.handle.net/11365/1143828.

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The efficiency of combustion processes is assuming nowadays a huge importance, since the energy production, many industrial processes, as well as building heating systems are still mainly based on the combustion of hydrocarbons. The performance of the combustion process depends on many factors and it is a crucial point for the reliability and the efficiency of a plant or a thermal machine that exploits combustion as a primary source of energy. Moreover, the constant increasing of carbon dioxide concentration in atmosphere makes more and more important reducing the emission of this gas as well

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10

Hamilton, Ruth Munro. "Cardiorespiratory measurements using inspired oxygen sinusoids." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301515.

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11

Lindh, Thomas. "Performance monitoring in communication networks." Doctoral thesis, KTH, Microelectronics and Information Technology, IMIT, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3724.

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<p>Performance monitoring in communication networks, which isthe main topic of this thesis, is an essential part ofperformance and network management. The applications cover anumber of different areas such as daily operations andmaintenance, usage information for billing purposes, customerreports, traffic control, planning, and dimensioning.</p><p>The main purpose of the thesis is to develop a single methodfor measurement of the most significant network performanceparameters in IP networks. It is a continuation from a previouslicentiate thesis that focused on performance monitoring incell-base

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12

Fung, Stephanie SY. "Seismic monitoring of dynamic bridge deformations using strain measurements." Thesis, University of Hawaii at Manoa, 2003. http://hdl.handle.net/10125/6975.

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In recent years, civil engineers have become very interested in developing systems to monitor the health of the structures that they have designed and built. There are many systems that can monitor the vertical deflections of structures, but there are few that can effectively measure deflections due to dynamic loads. This report investigates the use of a mathematical model proposed by Swiss engineers, Vurpillot et al [1998], and the selection of innovative fiber optic strain gauges along with a high-speed data acquisition system for future verification tests. Various laboratory static and dyna

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13

McCormick, Jackson C. "Spatial and temporal ionospheric monitoring using broadband sferic measurements." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54469.

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The objective of this thesis is to use radio emissions from lightning, known as `radio atmospherics' or `sferics', to study the temporal and spatial variation of the lower ionosphere, a layer of ionized atmosphere beginning at $\sim$70 km altitude (D-region). Very Low Frequency (VLF, 3$-$30kHz) radio waves are a useful diagnostic for lower ionospheric monitoring due to their reflection from this region and global propagation. Traditionally, the lower ionosphere has been sensed using single-frequency VLF transmitters allowing for analysis of a single propagation path, as there are only a small

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14

Hall, Angus John. "Electronic measurements of area and perimeter in ultrasonic images." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328883.

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15

Jazayeri, Sina. "Measurement and monitoring of moisture content in timber and investigations of moisture gradients using dielectric measurements." Thesis, University of Bedfordshire, 1999. http://hdl.handle.net/10547/622156.

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This thesis addresses various issues in connection with the measurement of moisture content in timber. The early parts include long term experimentally based studies which culminated in producing recommendations to existing British Standards for equilibrium moisture content (EMC) of timber in internal environments. Findings consistently showed lower EMCs than existing recommended values; these are believed to be caused by socio-economic factors. Intermediate sections of the thesis continue with tests on electrical methods of moisture content measurement to establish a basis for comparability a

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16

Virebrand, Marcus. "Real-time monitoring of voice characteristics usingaccelerometer and microphone measurements." Thesis, Linköpings universitet, Reglerteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69760.

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VoxLog is a portable voice accumulator, that uses both an accelerometer that measures skin vibrations and a regular microphone to collect data. The goal of the thesis was to implement and evaluate methods that based on this data estimate the three different voice parameters fundamental frequency, phonation and soundpressure level. For pitch, three different methods were evaluated. The different methods all require relatively low computational power since the goal was to implement at least one of them on the digital signal processor in the VoxLog. The results from these evaluations show that th

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17

Veen, Robertus Leonardus Petrus van. "In Vivo optical measurements for diagnostics and monitoring ot treatment." [S.l.] : Rotterdam : [The Author] ; Erasmus University [Host], 2006. http://hdl.handle.net/1765/10483.

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18

Nuqui, Reynaldo Francisco. "State Estimation and Voltage Security Monitoring Using Synchronized Phasor Measurements." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/28266.

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The phasor measurement unit (PMU) is considered to be one of the most important measuring devices in the future of power systems. The distinction comes from its unique ability to provide synchronized phasor measurements of voltages and currents from widely dispersed locations in an electric power grid. The commercialization of the global positioning satellite (GPS) with accuracy of timing pulses in the order of 1 microsecond made possible the commercial production of phasor measurement units. Simulations and field experiences suggest that PMUs can revolutionize the way power systems are moni

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19

Zhu, Ruoxi. "Online Voltage Stability Monitoring and Control Using Limited Synchrophasor Measurements." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/97197.

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As the scale and complexity of an interconnected power grid has increased significantly, power systems can be operated close to the verge of voltage instability. With the application of Phasor Measurement Units (PMUs), dispatchers are able to monitor long term voltage stability in a real time operational environment. This research addresses the critical issues by proposing three different methods. Voltage Stability Assessment Index (VSAI) is a Thévenin Equivalent (TE) based method considering voltage dynamic mechanisms. To extend the model from one load bus to a critical load center, Optimal P

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20

Medrano, Guillermo [Verfasser]. "Continuous Monitoring of Body Fluids Using Bioimpedance Measurements / Guillermo Medrano." Aachen : Shaker, 2011. http://d-nb.info/1071528432/34.

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21

Vargas, MariÌa Angeles MartiÌnez. "Real-time monitoring of cellular toxicity using electrical impedance measurements." Thesis, University of the West of England, Bristol, 2007. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444490.

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22

Alharbi, Sami Hamad. "Measurements and monitoring of naturally occurring radioactive materials for regulation." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/98122/1/Sami_Alharbi_Thesis.pdf.

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This project investigated the measurement of naturally occurring radioactive material. Such measurements are usually conducted to demonstrate compliance with the national and international requirements for radiation protection. The thesis reviewed the current regulation of these radioactive materials and identified the key regulatory challenges that relevant authorities face when implementing or establishing a regime for NORM. Limitations on the measurement of the release of radon (a radioactive gas) from surfaces were determined. The parameters influencing radon and thoron levels in indoor en

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23

McDannold, Nathan J. "MRI monitoring of high temperature ultrasound therapy /." Thesis, Connect to Dissertations & Theses @ Tufts University, 2002.

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Thesis (Ph.D.)--Tufts University, 2002.<br>Adviser: David Weaver. Submitted to the Dept. of Physics. Includes bibliographical references (leaves 218-243). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

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24

Junaid, Junaid. "Network-Based Monitoring of Quality of Experience." Doctoral thesis, Blekinge Tekniska Högskola, Institutionen för kommunikationssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10495.

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The recent years have observed a tremendous shift from the technology-centric assessment to the user-centric assessment of network services. Consequently, measurement and modelling of Quality of Experience (QoE) attracted many contributions from researchers and practitioners. Generally, QoE is assessed via active and passive measurements. While the former usually allows QoE assessment on the test traffic, the latter opens avenues for continuous QoE assessment on the real traffic generated by the users. This thesis contributes towards passive assessment of QoE. This thesis document begins with

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25

Culliss, Jerel Alan. "A Method for PMU-Based Reconfigurable Monitoring." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/35646.

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Given an increasing tendency towards distributed generation and alternative energy sources, the power grid must be more carefully monitored in order to ensure stability. Phasor Measurement Units (PMUs) provide very good observation of a small area of a network, but their relatively high cost prevents them from being deployed at every point. Therefore, to monitor an entire network, State Estimation is still required. By combining these two techniques, the accuracy and speed of power network monitoring can be improved. This thesis presents a method for achieving this goal from both hardware and

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26

Lee, Chi-yeung. "Estimation of blood glucose variations using noninvasive metabolic measurements." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39330680.

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27

Lee, Chi-yeung, and 李子洋. "Estimation of blood glucose variations using noninvasive metabolic measurements." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39330680.

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28

Al-Rawi, S. A. N. "Silicon sublimation at ultra high vacuum with microprocessor monitoring and measurements." Thesis, University of Kent, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382189.

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29

Kokko, V. (Voitto). "Condition monitoring of squirrel-cage motors by axial magnetic flux measurements." Doctoral thesis, University of Oulu, 2003. http://urn.fi/urn:isbn:9514269381.

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Abstract The aim of this research work is to develop a tool for condition monitoring of squirrel-cage motors using axial magnetic flux measurements, and to design a diagnostics system for electrical motors. The basic theory of the measurements and systems was found through literature reviews and was further developed from the experimental results of this research work. Fluxgate magnetometers and Hall effect sensors are not reliable enough for condition monitoring purposes, but measurements by flux coil sensors can reach adequate reliability. The useful frequency area of the flux coil sensor i

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30

Hajiabdolmajid, Vahid Reza. "Remote monitoring of underground excavations by means of deformation measurements (CIUS)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq21767.pdf.

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31

Carbone, Daniele. "Gravity monitoring of Mount Etna (Italy) through discrete and continuous measurements." Thesis, Open University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393192.

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32

Cindemir, Umut. "Thin films for indoor air monitoring : Measurements of Volatile Organic Compounds." Doctoral thesis, Uppsala universitet, Fasta tillståndets fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302558.

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Volatile organic compounds (VOCs) in the indoor air have adverse effects on the dwellers residing in a building or a vehicle. One of these effects is called sick building syndrome (SBS). SBS refers to situations in which the users of a building develop acute health effects and discomfort depending on the time they spend inside some buildings without having any specific illness. Furthermore, monitoring volatile organic compounds could lead to early diagnosis of specific illnesses through breath analysis. Among those VOCs formaldehyde, acetaldehyde can be listed. In this thesis, VOC detecting th

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33

Ali, Md Afsar. "In-process quality monitoring of laser welds using multi-sensor measurements /." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488192447428925.

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34

Dong, Jingyuan. "Power System Disturbance Analysis and Detection Based on Wide-Area Measurements." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/30129.

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Wide-area measurement systems (WAMS) enable the monitoring of overall bulk power systems and provide critical information for understanding and responding to power system disturbances and cascading failures. The North American Frequency Monitoring Network (FNET) takes GPS-synchronized wide-area measurements in a low-cost, easily deployable manner at the 120 V distribution level, which presents more opportunities to study power system dynamics. This work explores the topics of power system disturbance analysis and detection by utilizing the wide-area measurements obtained in the distribution ne

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35

Liaw, Hibisca. "Underwater measurements of heart rate." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47546.

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The objective of this project is to develop a device that can monitor the heart rate and respiration of cetaceans. This would provide a way to quantitatively measure stress and determine the impact of human activity on cetaceans, especially for certain species that have been difficult to monitor in the past. There are many challenges to developing such a device, including determining the appropriate type of sensor, reducing the effect of flow noise, and designing an effective attachment method; this paper primarily focuses on determining the most suitable acoustic transducer. Experiments were

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36

Auchinvole, Craig Alexander R. "SERS nanosensors for intracellular redox potential measurements." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/9706.

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Redox regulation and homeostasis are critically important in the regulation of cell function; however, there are significant challenges in quantitatively measuring and monitoring intracellular redox potentials. The work in this thesis details a novel approach to intracellular redox monitoring. The approach is based on the use of nanosensors, which comprise molecules capable of sensing the local redox potential, assembled on gold nanoshells. Since the Raman spectra of the sensor molecules change depending on their oxidation state, and since the nanoshells allow a large enhancement of the Raman

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37

Matasane, Matasane Clement. "Investigation into the monitoring of microwaves in microwave cavities using optical techniques." Thesis, Peninsula Technikon, 2002. http://hdl.handle.net/20.500.11838/1076.

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Thesis (MTech (Electrical Engineering))--Peninsula Technikon, Cape Town, 2002.<br>Tne purpose of this research or study was to perform an investigation in the use of optical fibers as sensor elements in order to develop a millimetre wave instrument capable of measuring microwave power within microwave cavities. Included in the scope of the project was an investigation of microwaves and microwave power measurements techniques. The emphasis of the research work was to develop expertise in photonics, by modeling and developing a measuring technique using optical techniques. This was deemed

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38

Barron, Darlene H. "Student progress monitoring teachers' perceptions /." Diss., Mississippi State : Mississippi State University, 2009. http://library.msstate.edu/etd/show.asp?etd=etd-07082009-152901.

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39

Luthy, Thierry. "Three-dimensional permeability measurements based on direct current and ultrasound monitoring techniques /." Zürich, 2003. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=15050.

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40

Liu, Guoping. "Oscillation monitoring system based on wide area phasor measurements in power systems." Pullman, Wash. : Washington State University, 2010. http://www.dissertations.wsu.edu/Dissertations/Summer2010/g_liu_060110.pdf.

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Thesis (Ph. D.)--Washington State University, August 2010.<br>Title from PDF title page (viewed on July 23, 2010). "School of Electrical Engineering and Computer Science." Includes bibliographical references (p. 76-81).

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41

Johansson, Cecilia. "High-sensitivity Radioactive Xenon Monitoring and High-accuracy Neutron-proton Scattering Measurements." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4279.

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42

Kuhn, S., M. Buchholz, T. Wels, et al. "Cross section measurements on 61Cu for proton beam monitoring above 20 MeV." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-166097.

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Introduction All experimental studies involving charged particle induced nuclear reactions require a precise knowledge of monitor reactions. A number of well described proton induced monitor reactions exist in the lower energy range [1], which is covered by most medical cyclotrons. Concerning proton energies above 20 MeV, however, the accuracy of the monitor reactions declines as cross section data becomes scarcer. Furthermore, the growing interest in precise determination of projectile energies by comparing of ratios of monitor reaction cross sections demands new measurements and evaluations

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Kuschmierz, R., Y. Huang, J. Czarske, S. Metschke, F. Löffler, and A. Fischer. "3D shape measurements with a single interferometric sensor for insitu lathe monitoring." SPIE, 2015. https://tud.qucosa.de/id/qucosa%3A35040.

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Temperature drifts, tool deterioration, unknown vibrations as well as spindle play are major effects which decrease the achievable precision of computerized numerically controlled (CNC) lathes and lead to shape deviations between the processed work pieces. Since currently no measurement system exist for fast, precise and insitu 3d shape monitoring with keyhole access, much effort has to be made to simulate and compensate these effects. Therefore we introduce an optical interferometric sensor for absolute 3d shape measurements, which was integrated into a working lathe. According to the spindle

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44

Schatzmann, Dominik [Verfasser]. "Correlating Flow-based Network Measurements for Service Monitoring and Network Troubleshooting / Dominik Schatzmann." Aachen : Shaker, 2013. http://d-nb.info/1051573653/34.

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Palizban, Atefeh. "Wide-area monitoring and control utilizing PMU measurements for a system protection scheme." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52888.

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The ever increasing complexity of the electrical grid has made it difficult to predict and anticipate contingencies. This is mainly due to the advent of deregulated electricity markets, aging transmission infrastructure and the growing penetration of renewable resources. The wave of blackouts in recent years has made utilities much more aware of the need for power system wide monitoring and control. One of the fundamental requirements to achieve that goal is to have common measurement reference. A few technology enablers have emerged which have led to development of a new kind of measurement p

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Janssen, Pierre. "Monitoring, protection and fault location in power distribution networks using system-wide measurements." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209366.

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This work takes place in the context of distribution grids with high level of distributed generation, for example in microgrids. With high level of distributed generation, it has been shown that selective, fast and sensitive network protection is expected to be more difficult. Furthermore, during system restoration, the accurate fault location could be more challenging to assess, thereby increasing the average outage duration.<p>Thanks to cost reductions and improvement of information and communication technologies, future distribution networks will probably have advanced communication infrast

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Safizadeh, Fariba. "Monitoring deposit properties and passivation of impure copper anodes by electrochemical noise measurements." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28449/28449.pdf.

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Konopacky, Q. M., C. Marois, B. A. Macintosh, et al. "ASTROMETRIC MONITORING OF THE HR 8799 PLANETS: ORBIT CONSTRAINTS FROM SELF-CONSISTENT MEASUREMENTS." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621227.

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We present new astrometric measurements from our ongoing monitoring campaign of the HR 8799 directly imaged planetary system. These new data points were obtained with NIRC2 on the W.M. Keck II 10 m telescope between 2009 and 2014. In addition, we present updated astrometry from previously published observations in 2007 and 2008. All data were reduced using the SOSIE algorithm, which accounts for systematic biases present in previously published observations. This allows us to construct a self-consistent data set derived entirely from NIRC2 data alone. From this data set, we detect acceleration

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Baldwin, Thomas L. "Real-time phasor measurements for improved monitoring and control of power system stability." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-170758/.

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Barber, David Edward. "Applications of phasor measurements to the real-time monitoring of a power system." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12162009-020322/.

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