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GAZZOLA, LUCA. "Field Testing of Software Applications." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2019. http://hdl.handle.net/10281/241221.
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Quando interagiscono con sistemi software, gli utenti potrebbero dover affrontare problemi come crash, fallimenti e instabilità del programma. Il software difettoso in esecuzione sul campo non è solo la conseguenza di tecniche di verifica inefficaci, ma è anche dovuto alla complessità e alla diversità delle interazioni tra un'applicazione e il suo ambiente. Molte di queste interazioni sono difficilmente previste al momento del test, e anche quando potrebbero essere previste, spesso ci sono così tanti casi da testare che non possono essere affrontati in modo fattibile prima che il software sia rilasciato.
Il testing sul campo si propone di affrontare il problema dei fallimenti delle applicazioni sul campo spostando la fase di test direttamente nell'ambiente di produzione. Ciò rende possibile sfruttare diversi scenari che altrimenti sarebbero difficili da catturare con test tradizionali.
In questa tesi esploriamo l'area del testing sul campo del software, presentiamo uno studio che caratterizza il problema delle applicazioni che falliscono sul campo, un'architettura client-server che può essere sfruttata per organizzare e controllare il processo di test sul campo e un approccio di test che sfrutta l’ambiente di produzione come banco di prova per l'esecuzione dei test case. L'approccio presentato viene valutato empiricamente su un dataset di errori del software, dimostrando che il 35% dei guasti non rilevati internamente potrebbe essere stato rivelato con test sul campo.When interacting with their software systems, users may have to deal with problems like crashes, failures, and program instability. Faulty software running in the field is not only the consequence of ineffective in-house verification and validation techniques, but it is also due to the complexity and diversity of the interactions between an application and its environment. Many of these interactions can be hardly predicted at testing time, and even when they could be predicted, often there are so many cases to be tested that they cannot be all feasibly addressed before the software is released. Field testing aims to tackle the problem of applications failing in the field by moving the testing phase directly in the field environment. This makes it possible to exploit different scenarios that would otherwise be difficult to capture with in-house testing. In this Ph.D. thesis we explore the area of software field testing, we present a study that characterizes the problem of applications failing in the field, a client-server architecture that can be exploited to organize and control the field testing process and a testing approach that exploits the field itself as testbed for running the test cases. The presented approach is empirically evaluated on a popular dataset of software faults demonstrating that 35% of the faults that were not discovered in-house could have been revealed with field testing.
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Black, Donald Nelson Jr. "Test zone field compensation." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/15047.
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Stoupis, James D. "Dynamic testing of loss of field protection." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-08292008-063410/.
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Franco, Jason M. "Design and field testing of jointless bridges." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=713.
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Thesis (M.S.)--West Virginia University, 1999.Title from document title page. Document formatted into pages; contains x, 209 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 192-198).
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Jha, Ranjani Kumar. "Field and laboratory testing of calcareous sand /." Title page, abstract and table of contents only, 1994. http://web4.library.adelaide.edu.au/theses/09ENS/09ensj59.pdf.
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Kusnanik, Nining Widyah, and n/a. "A comparison of field and laboratory testing of sports specific fitness for female field hockey players." University of Canberra. Applied Science, 2001. http://erl.canberra.edu.au./public/adt-AUC20050517.142313.
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There are many methods to measure the physical fitness of athletes, including tests
that can be applied in the field or in the laboratory. Much of the recent research with
regard to fitness of team sport players has been undertaken using laboratory testing to
measure aerobic power, anaerobic power and capacity, strength and flexibility. Field
tests are an alternative method to measure the fitness of players without the expense,
time and expertise required for the laboratory testing, especially in developing
countries.
The purpose of this study is to establish procedures for the application of
contemporary sports science practice for Indonesian female field hockey players,
including determination of the precision of field tests of the physical and performance
characteristics of field hockey players in Indonesia; determination of the physical and
performance characteristics of Indonesian female field hockey players; identification
of the performance demands and distance covered during competitive field hockey at
the national level in Indonesia; comparison of the physical and performance
characteristics of national level female field hockey players in Indonesia with those of
club level players in Australia; and determination of the relationships between field
and laboratory tests of physiological performance capacity for field hockey.
Due to conversion problems, five paragraphs have been omitted. For full abstract, see 01front.pdf.
In conclusion, the present study found that the Indonesian female field hockey players
(at the national level) were comparable to the Australian female field hockey players
(at the club level) in some physical and performance test results. However, they were
also different on other physical and performance characteristic measurements, with
the Indonesian players generally have lower values, for other performance
measurements.
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Kaya, Tevfik. "Characterization Of Kizilcahamam Geothermal Field By Tracer Testing." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606634/index.pdf.
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ABSTRACT
CHARACTERIZATION OF KIZILCAHAMAM GEOTHERMAL FIELD BY TRACER TESTING
Tevfik Kaya
M.S, Petroleum and Natural Gas Engineering Department
Supervisor : Assoc. Prof. Dr. Serhat Akin
Co-Supervisor : Prof. Dr. Mahmut Parlaktuna
September 2005, 107 Pages
Kizilcahamam Geothermal Field which is 70 km far from Ankara, has been utilized for Geothermal District Heating System, 25 MWt, 2500 residences capacity, greenhouses heating, thermal facilities since 1994. The average production rate is 350m3/h during the heating season , 150m3/h during the summer season for hot water and yearly average reinjection rate is 114m3/h from the field. The long term projections has been studied concerning on expected pressure decline by matching 10 years field history data which contain dynamic level and temperature data. The pressure decline is 140 kPa in the field between 1999 and 2005 with the existing reinjection rate, if the existing rates do not change, the additional pressure decline which is 120 kPa will be occurred up to 2011.
In order to get more information from the field, the fluorescein as tracer has been injected in to the MTA-1, and the samples were collected from the MTA-2, Fethi Bey, IHL-1 and IHL-3 for 3 months. The fluorescein concentration has been detected
by using fluorimeter, and tracer concentration time plots were analyzed. The fluoreiscein was detected in short breakthrough time in MTA-2 and Fethi Bey which are close to reinjection well, breakthrough time is longer in IHL-1 and IHL-3. The interpretation of tracer test shows that there is communication between all wells.
Tracer concentration time plots were compared with different mathematical models, the best match was obtained with multi-fractured model. These results show that Kizilcahamam field is not homogeneous field. It is expected that increasing the reinjection rate will decrease the pressure decline in the field.
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Gilliland, Gene Clay. "Field testing Bakke and Roberts' 'Old First' hypothesis." Theological Research Exchange Network (TREN), 1997. http://www.tren.com.
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Rattray, Benjamin, and n/a. "The validation of physiological field testing in elite orienteers." University of Canberra. Sports Studies, 2002. http://erl.canberra.edu.au./public/adt-AUC20050629.113059.
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The complex physiology of orienteering performance is not well understood but recent
advances in technology allow for more in-depth investigation. The purpose of this
study was to develop and validate physiological field tests for elite orienteers in
Australia.
Seven male and three female elite orienteers volunteered to take part in the study.
Subjects completed an incremental fixed-distance (803m) trial in Australian forest
terrain, paced by a bicycle equipped with a speedometer. This was replicated in the
laboratory using a 4.5% grade for treadmill running. Subjects also completed four
(males) or three (females) laps of a 1340m terrain loop incorporating uphill, track and
downhill sections. Subjects then repeated this test in the laboratory, with treadmill grade
manipulated to replicate the gradient profile of each section. Heart rate (HR) and
oxygen uptake (VCh) were recorded continuously with telemetry during each stage/lap.
Blood [La] and RPE were recorded after each stage/lap.
In the incremental tests, no significant differences (p=0.05 level) were observed in HR,
VO2, blood [La] or RPE between the Field test, and its Laboratory replication over the
entire range of speeds tested. The actual speeds run during the Field tests were
significantly faster than the Laboratory test at the slowest speed (8 kmh- 1 ) attempted,
and slower at the fastest speed (18 km-h-1) attempted. In the time-trial tests, no
significant differences were observed in HR, VO2, blood [La] or RPE between the
Field test and its Laboratory replication. The running speeds in the Field tests were
significantly slower than the Laboratory tests. Running speed appeared inversely
related to the course profile and the terrain also affected the speeds that could be
achieved. Despite the changes in the course profile, the physiological responses to the
course were maintained within a narrow range at a high level (-95% of maximal heart
rate, 80-90% of VO2max, blood [La] -10 mM) for the duration of the 20-25 minute test.
The Field tests that were developed in this study for elite orienteers in Australian forest
terrain were successfully validated by replicating the protocols in a Laboratory setting.
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Peyrow, Farzad. "Field testing of an agricultural land drainage computer model." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66172.
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Kirk, Markus. "The design, development and testing of hyperbolic field analyzer." Thesis, University of York, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311084.
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Cootes, Timothy F. "The field testing of a vortex storm sewage overflow." Thesis, Sheffield Hallam University, 1990. http://shura.shu.ac.uk/19500/.
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A full scale prototype of a vortex storm sewage overflow with peripheral spill has been build in Sheffield, its design being based on the results of model tests. The project described has been involved in monitoring this prototype with the aims of i) Assessing its hydraulic performance, ii) Assessing its ability to retain polluting material, particularly large 'gross solids' in the sewer, iii) To compare its performance with predictions made by the model tests. A review of previous work concerning storm overflows, the development of vortex overflows and sewer monitoring techniques was undertaken. The overflow was monitored with flow measurement equipment, bottle samplers and equipment designed to count the numbers of gross solids in the sewage entering and spilling from the chamber. The latter worked by pumping large volumes of sewage through a transparent cell, where it was filmed by a video camera. Objects passing were counted by eye when the film was examined later. The hydraulic monitoring showed that the overflow was effective at controlling flows in the sewage, and that mathematical and physical models predicted its performance. Analysis of discrete samples collected using bottle samplers showed little difference between the fine suspended solids and the dissolved material in inlet or spill. The results from measuring gross solids appeared to show that their concentration in the spill was less than that in the inflow by 20-40%. However insufficient storms were recorded to be sure to what extent the method of sampling affected the results. The results from the gross solid monitoring bore some resemblance to the predictions made by the model tests using estimates of the nature of particles in the storm sewage. This suggested that model tests using synthetic gross solid particles could give a good indication of the performance of full scale overflows.
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Kalabon, Amy Elizabeth. "Implementation and Field Testing of Improved Bridge Parapet Designs." Cleveland State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=csu1399314661.
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Jian, J. "Ultrasound field measurement and modelling for non-destructive testing." Thesis, City, University of London, 2017. http://openaccess.city.ac.uk/17646/.
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Ultrasonic Testing (UT) is one of most important methods of Non-destructive Testing (NDT) and ultrasonic waves can be generated and detected by means of numeric methods. This thesis focuses on piezoelectric transducers and Electromagnetic Acoustical Transducer (EMAT). For testing with piezoelectric transducer (also called a probe), couplant has to be applied between the test material and the probe allowing for ultrasonic waves generated in the probe by an active piezoelectric crystal to propagate into the testing material. The couplant can be water, mineral oil, or gel, dependent on the applications concerned and material compatibility, for example, water for immersion tests or automatated inspections. No two piezoelectric transducer designs are identical in terms of their frequency range, beam propagation characteristics and directionality. The shape, dimensions, backing and matching of the transducer to the pulse generator together play a major role in the generation of the ultrasonic waves. Furthermore, the quantitative interpretation of pulse echo data obtained when such transducers are used in nondestructive evaluation (NDE) requires a complete knowledge of the ultrasonic field transmitted. Ultrasonic fields of circular probes have been studied experimentally using a miniature probe and theoretically with models developed to predict ultrasonic field of such a probe. Good agreement has been observed. In a fluid, the ultrasonic field generated by a circular piezoelectric transducer can be described in terms of a combination of locally plane waves that radiate in the geometric region straight ahead of the active transducer element and edge waves radiating from the rim of the element. When a piezoelectric transducer is directly mounted onto a solid material, the ultrasonic field includes locally plane longitudinal waves, edge longitudinal waves and mode-converted edge shear waves. Both cases can be studied using miniature piezoelectric probes. For electrically conductive materials, EMATs can be used for generation by means of Lorentz force or magnetostriction or both, and detection. EMAT technique is non-contact and couplant free and can work at high temperature. These attributes make it ideal for inspection in extreme conditions, such as high temperature, high speed, rough surface, etc. This thesis focuses on Lorentz force generation. The main disadvantages of an EMAT detector are its lower sensitivity compared to a piezoelectric probe and it is not straightforward to miniaturise the device to operate as a point sensor for the range of wavelengths of interest here. Therefore, optimal EMAT design is extremely important for successful EMAT application. Ultrasound may be generated without presence of external magnetic field as excitation electric current provides magnetic field as it induces eddy currents in the material under test, which creates Lorentz forces for ultrasonic generation. Where external magnetic field is applied, EMATs have to be designed correctly to achieve enhanced efficiency. As an example, Rayleigh wave EMAT generation has been studied. It is found that where external magnetic field is applied, constructive or destructive effects have been observed, which is understood dependent on direction of the external magnetic fields applied relevant to electric current direction. Optical interferometer to measure the true normal displacement of the solid surface with a resolution in the order of nanometres, but it is much more complex than an EMAT and a piezoelectric probe and requires an optically flat surface. The receiving EMAT detector measures particle velocity. By careful design, in-plane or out-of-plane (or both) velocities can be chosen for detection. This capability is very useful for the detection of longitudinal waves, shear waves, Rayleigh waves or Lamb waves efficiently. The ultrasonic pulse-echo technique has been widely used in ultrasonic NDT. Ultrasonic pulse-echo responses and ultrasonic field signals are not the same. Typically, edge waves are rarely seen in a pulse echo response because the plane waves that are normal to the major face of the active crystal of the same probe are nearly in phase to constructively result in a significant signal whilst edge waves arrive at the active crystal in different directions and different phases cancelling each other and destructively producing only a small signal that is barely observable. As an example of ultrasonic pulse-echo application, weak bond evaluation, has been performed. Weak bond evaluation has always been a challenge. As an example of practical applications, this study has evaluated Integrated Circuit packaging in electronic industry using scanning acoustical microscopy. The relationship among resulting ultrasonic C-scan images, destructive mechanical failure measurement, degradation cycles have been observed. The result is promising indicating the SAM is a very useful tool for weak bond evaluation. Ultrasonic field measurement using a miniature probe and specially design EMAT is very important to characterize and standardize a probe. Such a technique can also find its applications in defect detection and categorization, which has not been considered in this study.
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Shah, Ghafoor, and Saad Arslan. "Design of an in-field Embedded Test Controller." Thesis, Linköpings universitet, ESLAB - Laboratoriet för inbyggda system, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70791.
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Electronic systems installed in their operation environments often require regular testing. The nanometer transistor size in new IC design technologies makes the electronic systems more vulnerable to defects. Due to certain reasons like wear out or over heating and difficulty to access systems in remote areas, in-field testing is vital. For in-field testing, embedded test controllers are more effective in terms of maintenance cost than external testers. For in-field testing, fault coverage, high memory requirements, test application time, flexibility and diagnosis are the main challenges. In this thesis, an Embedded Test Controller (ETC) is designed and implemented which provides flexible in-field testing and diagnostic capability with high fault coverage. The ETC has relatively low memory requirements for storing deterministic test data as compared to storing complete test vectors. The test patterns used by the ETC are stored separately for each component of the device under test, in system memory. The test patterns for each component are concatenated during test application according to a flexible test command. To address test application time (which corresponds to down time of the system), two different versions of the ETC are designed and implemented. These versions provide a trade off between test application time and hardware overhead. Hence, a system integrator can select which version to use depending on the cost factors at hand. The ETC can make use of an embedded CPU in the Device Under Test (DUT), for performing test on the DUT. For DUTs where no embedded CPU is available, there is the additional cost of a test specific CPU for the ETC. To access the DUT during the test application, the IEEE 1149.1 (JTAG) interface is used. The ETC generates test result that provides information of failing ICs and patterns. The designed and implemented versions of the ETC are validated through experimentations. An FPGA platform is used for experimental validation of the ETC versions. A set of tools are developed for automating the experimental setup. Performance and hardware cost of the ETC versions are evaluated using the ITC'02 benchmarks.
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Canner, Isaac W. "Field testing of prestressed concrete piles spliced with steel pipes." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011356.
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Andrade, Marc-David. "Field testing of a biological system for reducing nitrate pollution." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0031/MQ50709.pdf.
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Cornalba, Lorenzo T. (Lorenzo Tarcisio). "Connections over spaces of conformal field theories : testing for integrablity." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/28103.
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Peterson, Deana R. "Development and field testing of the elementary school accessibilty checklist." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-10052007-143557/.
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Hartman, Chad. "Field-testing the intelligence estimate : a strategy for genuine learning /." Maxwell AFB, Ala. : School of Advanced Air and Space Studies, 2008. https://www.afresearch.org/skins/rims/display.aspx?moduleid=be0e99f3-fc56-4ccb-8dfe-670c0822a153&mode=user&action=downloadpaper&objectid=b63f14d9-aca5-49a8-b0ba-538c42a24fb3&rs=PublishedSearch.
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Wineland, Vernon William. "Laboratory and field testing and evaluation of precast bridge elements." [Ames, Iowa : Iowa State University], 2009.
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Oesch, Everett Ralph. "Strength and performance field testing of hybrid HPS bridge A6101 /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p1418053.
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Flint, H. M., and J. R. Merkle. "Pink Bollworm Field Testing New Polyethylene Tube Dispenser for Gossyplure." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/204082.
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Potgieter, Juan-Pierre. "Single event upset testing of flash based field programmable gate arrays." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/12520.
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In the last 50 years microelectronics have advanced at an exponential rate, causing microelectronic devices to shrink, have very low operating voltages and increased complexities; all this has made circuits more sensitive to various kinds of failures. These trends allowed soft errors, which up until recently was just a concern for space application, to become a major source of system failures of electronic products. The aim of this research paper was to investigate different mitigation techniques that prevent these soft errors in a Video Graphics Array (VGA) controller which is commonly used in projecting images captured by cameras. This controller was implemented on a Flash Based Field Programmable Gate array (FPGA). A test set-up was designed and implemented at NRF iThemba LABS, which was used to conduct the experiments necessary to evaluate the effectiveness of different mitigation techniques. The set-up was capable of handling multiple Device Under Tests (DUT) and had the ability to change the angle of incidence of each DUT. The DUTs were radiated with a 66MeV proton beam while the monitoring equipment observed any errors that had occurred. The results obtained indicated that all the implemented mitigation techniques tested on the VGA system improved the system’s capability of mitigating Single Event Upsets (SEU). The most effective mitigation technique was the OR-AND Multiplexer Single Event Transient (SET) filter technique. It was thus shown that mitigation techniques are viable options to prevent SEU in a VGA controller. The permanent SEU testing set-up which was designed and manufactured and was used to conduct the experiments, proved to be a practical option for further microelectronics testing at iThemba LABS.
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Masood, Munazzah. "ARABIC IN PAKISTAN PROBLEMS AND SOLUTIONS IN THE FIELD OF TEACHING AND TESTING: ARABIC IN PAKISTANPROBLEMS AND SOLUTIONS IN THE FIELD OF TEACHING AND TESTING." Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-156200.
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This dissertation discusses with both the teaching and testing systems associated with the language of Arabic in Pakistan. This study does not only discuss the pedagogical issues of teaching this language in Pakistan, but it also highlights the importance of it being a symbolic language and the resultant symbolic interpretation. The focus of the study is the translation and interpretation of the Arabic language and how it has affected socio-political aspects, in general, and linguistic issues, in particular, in Pakistan. Due to the Arabic language, linguistic symbolism has brought a distinctive intervention in the society. Arabic, as a symbolic language, has promoted a parallel ideological perspective in Pakistan.
This study was conducted in four phases. The first phase was empirical and it started in 2009 with the translation and teaching of the book entitled, “Modern Stan-dard Arabic: An Elementary-Intermediate Course” to the Arabic-language students in Lahore, Pakistan. The second phase was to evaluate the translation and teaching of the book with the help of pre- teaching and post-teaching assessments. The third phase of the research was to understand the scope of the Arabic language as it exists in Pakistan with the help of the survey method. The researcher interviewed 220 conveniently selected respondents in Lahore and Multan, Pakistan. The Statistical Package for the Social Sciences (SPSS) was used to analyze the three types of data (pre-teaching, post-teaching and the scope of the Arabic language). The fourth phase of the research was to analyze the data that comprised the research report.
The study revealed that a significant majority (80%) of the respondents were interested in learning Arabic because it is the language of the Holy Qur’an and Islam. It also showed that people also wish to learn the Arabic language in order to secure employment in the Middle-Eastern and in the Arabian Gulf countries. The respondents also reported that they want to learn the Arabic language because of its rich literature of history, science and culture. However, the respondents were at odds with the traditional method of teaching and testing the Arabic language. As a result, these students were learning less language but more ideological construct in the name of Arabic. This pedagogical problem has serious consequences.
The study also found that the “Modern-Standard Arabic: An Elementary-Intermediate Course” is an excellent resource to use to change the traditional peda-gogical skills. It ascertained that people shifted their traditional perspective of the Arabic learning for religious purposes to the “living language”, the language of everyday conversation. The students of the course ranked the “Modern Standard Arabic” high as compared to the traditional methods of teaching. However, they also had trouble and these were highlighted in the dissertation.
This research gleaned that Madrasas (religious schools) in Pakistan were the major source of the Arabic-language teaching in Pakistan. These Madrasas teach with traditional methods and imparted a vested interest-based interpretation of the religion. In this way, the Arabic language as it existed in Pakistan did not give real linguistic meaning to the students but rather give a single-dimension perspective of the religion to the students. This inadequate teaching of the language has simultaneously promoted less tolerance and has expanded the extremist point of view in Pakistan. The language, in other words, seems to be a breeding ground of the extremism that appears to prevalent in Pakistan and thereby gives a misguided version of the language to the members of the society.
The second source of Arabic-language teaching in Pakistan was the public-sector universities. These universities were training students to become religious scholars rather than linguistics or translators/interpreters of the Arabic language. The focus of the syllabi of the universities promoted Islamic Arabic literature and the Middle-Eastern perspective of Islam. However, a few of the universities were promoting some level of standard Arabic and Arabic language. Nevertheless, linguistic Arabic as such was virtually non-existent and people regard the language of English as a linguistic subject.
Theoretically, ‘Arabic’ has not been treated as a living language in Pakistan. On the one hand, even native-Arabic societies did not take into account the importance of the Arabic language and they hardly emphasize the standardization of it. Native-speaking Arabic scholars have rarely developed theoretical perspectives of the Arabic language or have contributed to its linguistic theory, on the other hand. This state of affairs has developed pedagogical illusions regarding language and linguistics.
This dissertation argues that Arabic is a ‘living language’ and that to incorporate it as such a lot of work needs to be done. A standardization of both the language itself and the systems of teaching and testing it needs to be developped. This language re-quires a modernized perspective, both pedagogically as well as linguistically. Theatrically, Arabic requires linguistic perspectives in order to address the pedagogical illusion. Generally, these scientific developments are lacking in the Arabic language. The result is the misinterpretation, confusion and vagueness that have left space for Arabic to be regarded simply as a symbolic language. This symbolic perspective has promoted a single dimension of the language, i.e. the ideological construct, but has also reduced the role as a language of translation and linguistic vigour.
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Jidegren, Martin, and Tushar Gupta. "Quality control of a diagnostic tool through qualitative and quantitative measurement assessment of field testing." Thesis, Linköpings universitet, Industriell ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119424.
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The purpose of this study is to develop a method to qualitatively and quantitatively measure and assess the field testing of a diagnostic tool by identifying the parameters that are relevant to assess a field test. The study is conducted at Scania CV AB, Södertälje, Sweden, a world leading manufacturer of trucks, buses and industrial and marine engines, where a method to assess the field test of their diagnostic currently does not exist. The study follows a deductive approach while taking a positivistic and hermeneutic perspective. The relevant theories and literature such as quality development and software testing are described to give a better understanding of the study. The study is conducted in four main steps- description of present situation, situation analysis, development of the assessment approach or framework and evaluation of the framework. The empirical information gathered from numerous interviews and meetings is presented in the description of present situation along with the various data sources available. The collected data from different databases is analysed where hypotheses are formulated based on the different influencing parameters for field testing. The correlations between the parameters are then calculated and analysed to verify the hypothesis as True or False. The ECU updates are also analysed to show that the ECU updates performed during field testing is a good representation of the actual usage after release. The framework to assess the field test is then developed using the available data and analysis made. A holistic view is taken to include the processes before and after the field test in the framework. The framework is in the form of an Excel workbook where data is either copied from databases or manually entered and relevant graphs describing the field test are generated automatically. The time period to be displayed on the graphs can be selected manually. This gives a good base to take decisions about how a field test has gone and whether or not the software is ready for release. Based on the correlation of the different parameters, a table with different key values of how much field test usage that should be conducted based on the number of implemented change requests are presented. Thus the result is that the most important attributes to consider for a field test are the amount of implemented changes where each field test usage occasion increases the chance of finding potential faults in the software of the diagnostic tool. An unrestricted framework is also described using data that may be available, but currently difficult to utilise effectively. Thus the recommended future work is represented by this framework which describes what information that can be obtained from different data sources and how they can be used to get a detailed understanding of what exactly has been used during field testing as well as after the software has been released. The framework is assessed in the last step and its uses along with limitations are described. The difficulty in describing the success of software testing is also discussed to give a good context to the framework and understand its utility.
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Yang, Tong. "CFD and field testing of a naturally ventilated full-scale building." Thesis, University of Nottingham, 2004. http://eprints.nottingham.ac.uk/10091/.
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Natural ventilation has the potential to provide good indoor air quality, thermal comfort for occupants, and can also save energy and reduce CO2 emissions. Computational fluid dynamics (CFD) offers detailed information about indoor flow patterns, air movement, temperature and local draught distribution in buildings, so it has unique advantages as an efficient and cost-effective tool for optimum design in a complex built environment. This thesis shows the use of CFD to simulate the coupled external and internal flow field around a 6m cubic building with two small openings. To study both wind driven and combined wind and buoyancy driven cross ventilation through a full-scale cubic structure, un-structured grid CFD and a steady envelope flow model were applied to calculate mean ventilation rates. To validate the CFD results, full-scale experiments were undertaken under various weather conditions in England. For wind driven ventilation RANS model predictions were proved reliable when wind directions were near normal to the ventilation openings, i.e. 0o~30o. However, when the fluctuating ventilation played a more dominant role than the mean flow (90o) RANS models were incapable of predicting the total ventilation rate. Improved results may be expected by applying more sophisticated turbulence models, such as LES, weighted quasi-steady approximations, or unsteady envelope flow models. In the thesis experience on the modelling of combined wind and thermal effects is outlined and feedback is provided to CFD code developers to enable further improvements for building ventilation studies. The full-scale field testing data from this study is valuable for comparison with wind tunnel results and validation of CFD applications.
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Al-Huthaili, Salim Saif. "Theoretical, experimental and field testing of ground source heat pump systems." Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410189.
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Sheffer, Gregory John Antonelli. "Investigation of Copper Pitting Propensity Using Bench and Field Scale Testing." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/42814.
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A range of techniques designed to monitor copper pitting propensity were applied at two water utilities with known pitting disposition. In addition to traditional approaches including ECorr rise, chlorine decay kinetics, and surface analyses, a novel method was attempted to develop â pitting currentsâ between copper samples exposed to differential flow. This method allowed pitting current, potential, and resistance between â pitsâ and sections of copper pipe to be measured. As part of this evaluation, effects of different corrosion inhibitors and secondary disinfectants were investigated in an attempt to identify water quality modifications that might alleviate copper pitting at each utility.
At a Florida utility where customers were experiencing a severe pitting problem, experiments investigated the effectiveness of corrosion inhibitors including orthophosphate, an orthophosphate-polyphosphate blend, and zinc polyphosphate. Results suggested that zinc polyphosphate provided the greatest likelihood of mitigating copper pitting corrosion, whereas orthophosphate and the orthophosphate-polyphosphate blend actually increased electrochemical indications of pitting. According to theory, orthophosphates can increase pitting intensity if applied in insufficient quantities, whereas cathodic inhibitors, such as zinc, can only reduce corrosion rates. Surface analyses determined that zinc polyphosphate produced the least amount of scale, whereas the control produced the greatest amount. Further, surface analyses also suggested that zinc and phosphorus may behave synergistically during precipitation reactions which decrease copper release. Subsequent testing at Virginia Tech laboratories confirmed that some of the benefits from the zinc polyphosphate product were directly attributed to zinc. Consistent with previous research, pitting propensity of the water in the absence of inhibitor decreased at pH 7.5 relative to pH 8.5 (Marshall, 2004). In addition, higher concentrations of chloramines increased the pitting propensity of the water, although the ratio of chlorine to ammonia had little effect.
Similar experiments were also conducted at a utility in Iowa. Copper pitting has always existed in this area at some low level; however an outbreak of copper pinhole leaks recently occurred that is temporally correlated with high chlorine and chloramine concentrations. Experiments investigated combinations of disinfectant type (free chlorine or chloramines) and corrosion inhibitor (orthophosphate or zinc polyphosphate) in an attempt to decrease pitting propensity. Results indicated that the addition of zinc polyphosphate decreased pitting propensity in free chlorine systems as well as systems dosed with chloramines. In contrast, the addition of orthophosphate seemed to be ineffective in either system. Final surface analyses confirmed that inhibitors performed most effectively in the free chlorine system, whereas no clear benefits were realized in chloramine systems.Master of Science
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Cambier, Severine. "ATMOSPHERIC CORROSION OF COATED STEEL; RELATIONSHIP BETWEEN LABORATORY AND FIELD TESTING." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1388763285.
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Tian, Jialin. "Field testing for automatic identification of turning movements at signalized intersections /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1422971.
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Zhu, Haibin. "A novel methodology for high strain rate testing using full-field measurements and the virtual fields methods." Thesis, Troyes, 2015. http://www.theses.fr/2015TROY0007/document.
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Ce travail se concentre sur le développement d'une procédure expérimentale d’essai mécanique à haute vitesse de déformation de matériaux. La nouveauté de ce travail est l'utilisation de champs d’accélération mesurés comme cellule de force, évitant la nécessité des mesures des forces externes. Pour identifier les paramètres constitutifs des matériaux testés à partir des mesures de champs, la méthode champs virtuels (MCV) basé sur le principe des puissances virtuelles (PPV) est utilisée. En dynamique, avec la MCV, il est possible de définir des champs virtuels qui mettent à zéro les puissances virtuelles des forces externes. Au lieu de cela, l'accélération obtenue grâce à une double dérivation temporelle des déplacements peut être utilisée comme une cellule de force. Enfin, les paramètres élastiques peuvent être identifiés directement à partir d’un système linéaire qui se construit en réécrivant le PPV avec autant de champs virtuels indépendants que d’inconnues à identifier. Cette procédure est d'abord validée numériquement par des simulations éléments finis puis mise en œuvre expérimentalement en utilisant deux configurations d’impact différentes. Les résultats confirment que effets inertiels peuvent être utilisés pour identifier les paramètres des matériaux sans la nécessité de mesurer la force d’impact, et sans exigence de déformations uniformes comme dans les procédures actuelles basées sur le montage de barres d’Hopkinson. Ces nouveaux développement ont le potentiel de mener à de nouveaux essais standards en dynamique rapideThis work focuses on the development of a novel experimental procedure for high strain rate testing of materials. The underpinning novelty of this work is the use of the full-field acceleration maps as a volume distributed load cell, avoiding the need for impact force measurement. To identify the constitutive parameters of materials from the full-field data, the Virtual Fields Method (VFM) based on the principle of virtual work is used here. In dynamics, using the VFM, it is possible to define particular virtual fields which can zero out the virtual work of the external forces. Instead, the acceleration obtained through second order temporal differentiation from displacement can be used as a load cell. Finally, the elastic parameters can be identified directly from a linear system which is built up through rewriting the principle of virtual work with as many independent virtual fields as unknowns. Thus, external force measurement is avoided, which is highly beneficial as it is difficult to measure in dynamics. This procedure is first numerically validated through finite element simulations and then experimentally implemented using different impact setups. Both results confirm that inertial effects can be used to identify the material parameters without the need for impact force measurements, also relieving the usual requirements for uniform/uniaxial stress in SHPB like test configurations. This exciting development has the potential to lead to new standard testing techniques at high strain rates
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Brutchen, George W. "Correlating the accelerated test life of an automotive component with its field life." Virtual Press, 2004. http://liblink.bsu.edu/uhtbin/catkey/1286397.
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Since new product designs have little field data available a correlation between field and accelerated test life cannot be made. However, a step partially accelerated life test approach where samples are tested under normal conditions for a time and then run to failure on an accelerated test can be used to estimate the statistical model parameters. This thesis developed the maximum likelihood parameter estimates for a step partially accelerated life test based on a Weibull distribution model for a hypothetical automotive component. Using a Monte Carlo approach with type-II censoring, the effect of sample size and length of sampling period used on the variability of the estimated parameters was examined. A smaller sampling period and small sizes lead to significant variability, which decreased as the sampling period and sample size increased. Use of a partitioned sample did not lead to an improvement in the variability of the estimates.Department of Mathematical Sciences
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Hayden, Audra H. "Correlation between field and laboratory testing for a full-scale stormwater pond." Tallahassee, Florida : Florida State University, 2010. http://etd.lib.fsu.edu/theses/available/etd-12062009-083125.
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Thesis (M.S.)--Florida State University, 2010.Advisor: Kamal Tawfiq, Florida State University, College of Engineering, Dept. of Civil and Environmental Engineering. Title and description from dissertation home page (viewed on July 14, 2010). Document formatted into pages; contains x, 99 pages. Includes bibliographical references (p. 96-98).
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Massa, Joshua Jacob. "Field testing of multiple span railroad flatcar bridges on low volume roads." [Ames, Iowa : Iowa State University], 2007.
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Heisey, Peter H. "Split-field and internally filtered imaging polorimeter [i.e. polarimeter] development and testing." Thesis, Monterey, California. Naval Postgraduate School, 1996. http://hdl.handle.net/10945/8996.
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Approved for public release; distribution is unlimitedA 'split-field' infrared optical system has been designed and constructed to provide simultaneous image pairs in a single frame of an infrared (IR) imager, differing only in the direction of linear polarization. The optical train is afocal, allowing its use with a variety of infrared imaging devices. The system can operate in both long-wave IR (8-12 micrometers) and mid-wave IR (3-5 micrometers) with interchangeable polarizing splitter plates. previous work at the Naval Academic Center for Infrared Technology (NACIT) at the Naval Postgraduate School has demonstrated that significant image improvement in infrared image contrast can be obtained by use of polarization filtering, especially for targets at sea through suppression of polarized sea background emission in the long wave, or of polarized reflection in the midwave. That work utilized digital subtraction of sequential image pairs with orthogonal polarizations, but suffered from inability to obtain simultaneous images and also from problems due to reflections from external polarization filters. Both of these problems are eliminated with the new split-field technique. Preliminary tests of this system with an AGA-780 imager were carried out in a field experiment using an Arleigh Burke DDG class ship as target at varying distances at sea. For comparison, images were also taken in successive pairs in time with the AGA-780 viewing the scene directly ( without the split-field adjunct) with interchangeable internal polarizing filters in a rotatable filter wheel. Subjective and numerical analysis of the data from the field experiment demonstrated good image quality and contrast improvement, and potential for future utility
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Shrank, Bryan P. "Development and Testing of a Field Ionized Ion Thruster for Microsatellite Applications." Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/43382.
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Development of a miniaturized ion thruster would enable microsatellites to sustain orbits over a long period of time with a high efficiency while minimizing mass and volume. The advent of carbon nanotube technology has made the development of a field ionized ion thruster possible. An interagency effort between the Naval Postgraduate School and the Nanotechnology Lab at NASA Ames Research Center into the development of a field ionized ion thruster is undertaken. A test apparatus is designed and constructed in order to allow testing of carbon nanotube samples grown on a silicon substrate with a 200 u[micron]m by 200 u[micron]m hole as the ionizing element of a new design for an ion thruster. Field emission tests show measured geometric electric field enhancement factors for our samples ranging from 1428 to 5229. Two of seven experiments show successful ionization of argon gas in a flow. A measured current of 2.1 x 10[negative 5 power] Amps is achieved from a 14 u[micron]m sample with a 113 u[micron]m gap distance and an applied voltage of 1000 Volts. Characterization of the Drag Coefficient of the sample orifice is also conducted to allow for determination of the mass flow rate and maximum expected current in future tests.
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Wiggs, Giles F. S. "Airflow over Barchan dunes : field measurements, mathematical modelling and wind tunnel testing." Thesis, University College London (University of London), 1992. http://discovery.ucl.ac.uk/1317535/.
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There are few empirical measurements of velocity, shear velocity, sand transport, morphological change on the windward slopes of dunes.This thesis compares field measurements on a barchan dune in Oman with calculations using a mathematical model (FLOWSTAR) and measurements in a wind tunnel. All three techniques demonstrate similar patterns of velocity, confirming the acceleration of flow up the windward slope, deceleration between the crest and brink and significant flow deceleration upwind of and at the toe of the dune. The FLOWSTAR model is unable accurately to predict airflow at the brink and its predictions near the surface are highly susceptible to small-scale terrain irregularities. The measurements of shear velocity in the field and those predicted by the FLOWSTAR model reflect observations of previous studies including the widely reported upwind reduction in shear velocity. Such a reduction in shear velocity upwind of the dune should result in a reduction in sand transport and sand deposition. This is not observed in the field. Wind tunnel modelling using a near-surface pulse-wire probe suggests that the field and FLOWSTAR methods of shear velocity derivation are inadequate. The wind tunnel results exhibit no reduction in shear velocity upwind of or at the toe of the dune. This maintenance of upwind shear stress may be caused by concave (unstable) streamline curvature, which is not taken into account by the field and FLOWSTAR techniques. From this hypothesis, a new model of dune dynamics is developed relying on the establishment of an equilibrium between windward slope morphology, streamline curvature and streamwise acceleration.
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Fellner, Gerlinde, Rupert Sausgruber, and Christian Traxler. "Testing Enforcement Strategies in the Field: Threat, Moral Appeal and Social Information." Wiley, 2013. http://dx.doi.org/10.1111/jeea.12013.
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We run a large-scale natural field experiment to evaluate alternative strategies to enforce
compliance with the law. The experiment varies the text of mailings sent to potential evaders
of TV license fees. We find a strong effect of mailings, leading to a substantial increase in
compliance. Among different mailings, a threat treatment which makes a high detection risk
salient has a significant deterrent effect. Neither appealing to morals nor imparting information about others' behavior enhances compliance on aggregate. However, the information condition has a weak positive effect in municipalities where evasion is believed to be common. (authors' abstract)
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Matheron, M. E., J. C. Matejka, and M. Porchas. "Field Testing of Potential New Fungicides for Control of Lettuce Diseases, 1993." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/214718.
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Several diseases caused by plant pathogenic fungi can cause economic losses to lettuce growers in Arizona. Leaf drop of lettuce is caused by Sclerotinia minor and S. sclerotiorum, while downy and powdery mildew are caused by Bremia lactucae and Erysiphe cichoracearum, respectively. Cool and moist environmental conditions favor development of leaf drop and downy mildew, while warmer and dry weather is conducive for development of powdery mildew. Potential new fungicides were evaluated for control of these diseases during the winter of 1992-93. For leaf drop, two nonregistered materials, Fluazinam and Topsin M, controlled disease at least well as the standard registered fungicides. Fluazinam and Aliette provided equivalent control of downy mildew, while Fluazinam but not Aliene significantly reduced the severity of powdery mildew on lettuce.
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Karsten, Bettina. "Analysis of reliability and validity of critical power testing in the field." Thesis, University of Greenwich, 2014. http://gala.gre.ac.uk/13278/.
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Critical Power (CP) provides a useful indicator of training status in continuous activities lasting between approximately 2 and 30 minutes. To date, determination of CP has been mostly constrained to the laboratory. The conventional laboratory protocol commonly requires multi-day time-to-exhaustion tests. The thesis below addresses whether CP can a) be determined without multi-day exhaustive trials and b) be determined in the field. Studies compared the findings of conventional laboratory determination methods with novel protocols in which either the testing mode, the recovery period between exhaustive trials, or the environment were manipulated. Study 1 demonstrates that the recently developed 3-min all-out protocol does not result in valid CP values, when using the isokinetic ergometer mode. Results indicated low levels of agreement (mean of 23-45 W) between conventionally determined CP and values derived through the 3-min all-out protocol. The average prediction error associated with the relationship between CP and the 3-min all-out End Power was 7%. In Study 2, values of CP derived through a conventional laboratory CP protocol were compared with those determined outdoors on a cycling track. High levels of agreement (mean of 2 -14 W) were observed between the laboratory and field values of CP. The average prediction error associated with the relationship between laboratory and field CP was 2.2%. Based in the laboratory, Study 3 compares a 24 h recovery protocol with a 3 h and a 30 min recovery protocols. High levels of agreement (mean of -2 - 11 W and -2 - 8 W respectively) were observed across protocols. The average prediction error associated with the relationship between the 24 h and 3 h and the 24 h and 30 min protocols was 2.4% and 3.3% respectively, suggesting that determination of CP could be made more ‘athlete-friendly’ by shortening the conventional 3-day protocol to one day. Study 4 uses three protocols to evaluate the shortened 30 min protocol in ecological valid open road conditions. Values of CP derived from laboratory protocols were compared to a) those derived from pre-planned and ‘grouped’ maximal efforts of 3 min, 7 min and 12 min with a 30 min recovery period between efforts (protocol 1), b) those of discrete and randomly performed, yet still pre-planned maximal efforts of the same durations (protocol 2), and c) to those extracted from self-directed training and racing of these same durations (protocol 3). The average prediction error associated with the relationship between the laboratory and the field values of CP was 3.1% (protocol 1), 4.9% (protocol 2) and 4.1% (protocol 3). Results, whilst providing high levels of agreement, also suggested that in particular protocols 1 and 3 potentially provide a practical and arguably ecologically valid alternative to the conventional laboratory protocol. Study 5 further investigates the overall CP determination procedure by comparing collected values of CP derived through 3 data points with both, CP laboratory and field values derived through 2 data points. High levels of agreement and low prediction errors (average 3.2%) associated with the relationship between 3 data points and 2 data points-derived CP were observed. Studies collectively provide support for the acceptance of field performance testing using CP, with either a 30 min inter-maximal effort recovery period or alternatively the extraction of non-planned specified maximal efforts from training and racing data. Overall the investigations described in the thesis suggest that CP determination is feasible beyond the laboratory and that consumer-level technology provides satisfactory ease and reliability of measurement in this context. Moreover, these novel CP determination methods allow coaches to continuously monitor their athletes.
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Laknaur, Amit. "Online and Built-in self-testing techniques for Field Programmable Analog Array." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/dissertations/158.
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This research develops a built-in self-testing (BIST) and online testing techniques for switched capacitor (SC) based Field Programmable Analog Arrays (FPAAs). Particularly, a BIST technique for programmable capacitor arrays (PCAs), which are essential building blocks in the SC based FPAAs, is developed and its efficiency is analyzed. The proposed BIST technique results in very little hardware overhead and can be easily implemented on FPAAs. Techniques to model the impact of parametric faults on the performance of programmable capacitor arrays are also developed. Closed-form equations are derived for estimating ranges of parametric faults that can be detected by the proposed PCA testing circuits and methods to improve PCA testing efficiency are also discussed. Secondly, a comprehensive methodology is developed to perform online testing of SC based FPAA circuits. By taking advantage of the programmable resources, the proposed method can effectively test various sections of the FPAA circuits. Techniques to effectively partition FPAA circuits for online testing as well as methods to address circuit stability issues are presented. Factors that affect the testing accuracy of the proposed method are also studied. Error sources in the proposed testing circuit are investigated and methods to improve the accuracy of testing results are presented. Furthermore a novel programmable analog comparator is developed whose error threshold can be adaptively adjusted according to its input signal levels. It is ideal for analog online testing applications for enhanced testing accuracy due to the fact that its programmability allows the end user to adapt the error threshold to the testing needs. Analytical equations for guiding the design of proposed comparator circuitry are derived. The proposed comparator circuit has been designed and fabricated using a CMOS 0.18 micro-meter technology. Measurement results of the fabricated chip are presented.
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Steinert, Bryan Christopher. "Field and Laboratory Evaluation of the Portable Falling Weight Deflectometer." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/SteinertBC2005.pdf.
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趙仲輝 and Chung-fai Chiu. "A modified flat dilatometer for field measurement of non-linear soil behaviour at small strains." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31212992.
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Hardyniec, Andrew B. "Dynamic Testing and Modeling of a Superelevated Skewed Highway Bridge." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/34806.
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Created in response to the aging infrastructure in the United States, the Long Term Bridge Performance Program (LTBPP) under the Federal Highway Administration (FHWA) proposes to assess the long-term performance of representative bridges through nondestructive evaluation (NDE) techniques and visual inspection. For consistency, a set of guidelines is needed to define the procedures for testing each bridge. The NDE techniques involve dynamic testing, and the protocol for this testing has yet to be finalized.
To evaluate the dynamic testing guidelines, a 103 ft single-span, simply supported highway bridge was dynamically tested. The test bridge was characterized by a skew of 34° and superelevation around 4%. Forced vibration testing involved an impact hammer with accelerometers measuring the response. Resonant frequencies were identified from the data by picking peaks from the magnitudes of the frequency response functions (FRF). Eleven modes were identified with frequencies ranging from 2.75 Hz to 22.5 Hz. Mode shapes associated with each mode were constructed using the imaginary components of the FRFs. The half-power bandwidth method was used to estimate the damping for each mode, with values ranging from 1% to 5% of critical damping.
Finite element (FE) models of the bridge were constructed in the commercial FE software Abaqus. The effects of adding and removing superelevation and skew, varying mesh refinement, and changing boundary conditions on modal parameters were thoroughly investigated. FE models were compared to the experimental results by directly comparing frequencies and using the modal assurance criterion to compare mode shapes. Support conditions of the actual structure were bounded using the results of the comparison.
Much insight was gained about forced vibration testing as applied to a full-scale bridge. The spectral resolution of the data proved to limit the accuracy and confidence of detecting closely-spaced modes and calculating damping estimates. Also, a more controlled method of exciting the structure was desired, such as using a shaker with a known input. Resonant frequencies of the FE models were sensitive to changes in boundary conditions, with some frequencies doubling. Both changes in boundary conditions and including skew and superelevation noticeably affected the mode shapes. When compared to the experimental results, the models with idealized roller and pin boundary conditions provided the best correlations based on resonant frequencies and mode shapes.Master of Science
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Schmid, Nehir. "High Magnetic Field in Low Temperature Vacuum Conditions : Magnet Design, Modeling and Testing." Thesis, Luleå tekniska universitet, Rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-82093.
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The Swiss Free Electron Laser (SwissFEL) at the Paul Scherrer Institute is a national prestige project that will enable ground breaking new x-ray scattering experiments in areas such as biology, chemistry and physics. A plannedactivity is to generate possibility for x-ray diffraction under high pulsed magnetic fields to explore quantum mattermaterials. In fact, an entire beam line (CristallinaQ), dedicated to extreme sample environment (vacuum, electro-magnetic field, low temperature).This Master’s thesis project concerns the development of a magnet system for pulsed magnetic fields to be synchronised with the free electron laser pulses. The system is based on small-sized coils. This makes the systemtransportable and avoids the huge financial challenges and power requirements of the magnets at pulsed fields laboratories at Toulouse, Dresden or Tallahassee. Ultimately the magnet shall provide large pulsed fields of more than 30 T under conditions very similar to space, i.e. vacuum, low-temperature.The thesis presents the development of a complete coil manufacture and testing setup including a capacitor bank topower the magnet. With planned upgrades of the equipment, the coil manufacturing process is reaching reproduceable levels. I produce a first iteration of magnet coils. They follow a classical copper conductor design reinforcedwith an epoxy-Zylon matrix. During testing we produced 15 Tesla fields without degradation of the coils. At lastI analyse the observations from the tests and propose improvements and future steps for the further developmentof the magnet.
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Hedric, Andrew C. "Dynamic Behaviors of Historical Wrought Iron Truss Bridges – a Field Testing Case Study." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc822751/.
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Civil infrastructure throughout the world serves as main arteries for commerce and transportation, commonly forming the backbone of many societies. Bridges have been and remain a crucial part of the success of these civil networks. However, the crucial elements have been built over centuries and have been subject to generations of use. Many current bridges have outlived their intended service life or have been retrofitted to carry additional loads over their original design. A large number of these historic bridges are still in everyday use and their condition needs to be monitored for public safety. Transportation infrastructure authorities have implemented various inspection and management programs throughout the world, mainly visual inspections. However, careful visual inspections can provide valuable information but it has limitations in that it provides no actual stress-strain information to determine structural soundness. Structural Health Monitoring (SHM) has been a growing area of research as officials need to asses and triage the aging infrastructure with methods that provide measurable response information to determine the health of the structure. A rapid improvement in technology has allowed researchers to start using new sensors and algorithms to understand the structural parameters of tested structures due to known and unknown loading scenarios. One of the most promising methods involves the use of wireless sensor nodes to measure structural responses to loads in real time. The structural responses can be processed to help understand the modal parameters, determine the health of the structure, and potentially identify damage. For example, modal parameters of structures are typically used when designing the lateral system of a structure. A better understanding of these parameters can lead to better and more efficient designs. Usually engineers rely on a finite element analysis to identify these parameters. By observing the actual parameters displayed during field testing, the theoretical FE models can be validated for accuracy. This paper will present the field testing of a historic wrought iron truss bridge, in a case study, to establish a repeatable procedure to be used as reference for the testing of other similar structures.
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Bramell, Axel. "Differences in the relationship of heart rate and blood lactate values between running on track versus inclined treadmill : Improving laboratory testing to accurately prescribe exercise intensities." Thesis, Umeå universitet, Idrottsmedicin, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-131460.
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The purpose of the study was to evaluate the generalisability of the heart rate-blood lactate relationship determined in laboratory testing in comparison to running over ground. This plays a crucial role to prescribe exercise intensity from laboratory results. Ten well trained runners performed a maximal oxygen uptake (VO2max) pre-test and an incremental submaximal test performed at a two degrees inclined treadmill and a running track. Statistical analysis included student’s t-test of heart rate at interpolated blood lactate levels and comparison of second order polynomial regression lines. VO2max was 60,4 ± 6 ml/kg/min for men and 56,3 ± 4,3 ml/kg/min for women. There was no significant difference in heart rate at interpolated blood lactate of 3 and 4 mmol/L. There was no significant difference between heart rate values at any running velocity. A significant difference between blood lactate values was observed 14km/h (p=0,04). When considering blood lactate values up to 6mmol/L, heart rate-blood lactate relationships were similar. In conclusion, lactate threshold testing on treadmill through incremental test protocols on a two degrees incline gives similar heart rate- blood lactate relationship as running over ground and may be used to prescribe intensity in training performed over ground.
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Cobb, Bryan Richard. "Laboratory and Field Studies in Sports-Related Brain Injury." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73208.
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The studies presented in this dissertation investigated biomechanical factors associated with sports-related brain injuries on the field and in the laboratory. In the first study, head impact exposure in youth football was observed using a helmet mounted accelerometer system to measure head kinematics. The results suggest that restriction on contact in practice at the youth level can translate into reduced head impact exposure over the course of a season. A second study investigated the effect of measurement error in the head impact kinematic data collected by the helmet mounted system have on subsequent analyses. The objective of this study was to characterize the propagation of random measurement error through data analyses by quantifying descriptive statistic uncertainties and biases for biomechanical datasets with random measurement error. For distribution analyses, uncertainties tend to decrease as sample sizes grow such that for a typical player, the uncertainties would be around 5% for peak linear acceleration and 10% for peak angular (rotational) acceleration. The third and fourth studies looked at comparisons between two headforms commonly used in athletic helmet testing, the Hybrid III and NOCSAE headforms. One study compared the headform shape, particularly looking at regions that are likely to affect helmet fit. Major differences were found at the nape of the neck and in the check/jaw regions that may contribute to difficulty with fitting a helmet to the Hybrid III headform. For the final study, the impact responses of the two headforms were compared. Both headforms were mounted on a Hybrid III neck and impacted at various magnitudes and locations that are representative of impacts observed on the football field. Some condition-specific differences in kinematic parameters were found between the two headforms though they tended to be small. Both headforms showed reasonable repeatability.Ph. D.
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Miller, Kelsey, and Olivier Guyon. "Linear dark field control: simulation for implementation and testing on the UA wavefront control testbed." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622027.
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This paper presents the early-stage simulation results of linear dark field control (LDFC) as a new approach to maintaining a stable dark hole within a stellar post-coronagraphic PSF. In practice, conventional speckle nulling is used to create a dark hole in the PSF, and LDFC is then employed to maintain the dark field by using information from the bright speckle field. The concept exploits the linear response of the bright speckle intensity to wavefront variations in the pupil, and therefore has many advantages over conventional speckle nulling as a method for stabilizing the dark hole. In theory, LDFC is faster, more sensitive, and more robust than using conventional speckle nulling techniques, like electric field conjugation, to maintain the dark hole. In this paper, LDFC theory, linear bright speckle characterization, and first results in simulation are presented as an initial step toward the deployment of LDFC on the UA Wavefront Control testbed in the coming year.