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1
Margetaj, Martin. "Návrh a ověření funkčnosti systému směrového řízení vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402537.
Full textAbstract:
V této práci je prezentován a popsán FlexRay komunikační protokol se sběrnicí. Je představeno několik matematických modelů vozidel pro simulaci a pro vývoj řídících systémů. Dále je popsána tvorba signálové brány pro testovací vozidlo. Software pro úpravu signálu je implementován a odzkoušen v testovacím vozidle. Matematick0 modely byli parametrizovány aby odpovídali skutečnému vozidlu. Vyvinuté řídící systémy pro ovládání vozidla skrze losí test byli implementovány do automobilu a jejich vlastnosti byli otestovány. Závěrem jsou prezentovány výsledky testů jednotlivých řídících systémů.
2
Tmejová, Tereza. "Model řidiče pro simulační algoritmy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417521.
Full textAbstract:
This diploma thesis deals with the creation of a computation driver model. In the first part, there is an overview on driver models for longitudinal and lateral control. Next, driving maneuvres that could be selected for testing of driver model are described. In the practical part, there is created a computational driver model, whose task is to follow required path. The resulting model is tested on three driving maneuvers - steady turning, moose test and slalom. Finally, this model is tested on the passage of a real track. For all these tracks, a comparison is made and the success of the model is evaluated.
3
Boháč, Petr. "Simulační modely lidského operátora." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219955.
Full textAbstract:
This paper deals with simulation models of the human operator controlling lateral position of simulated vehicle. I am comparing parameters and quality of the McRuer human driver model and the PID controller. Simulated system is single-track vehicle model. Simulated driver is tasked to pass a Moose test with this vehicle model. I am using the simulated annealing method to find optimal parameters of the driver model and then I visualize realized test in 2D and 3D visualization. In the end of this paper I compare simulations of the driver models and assess achieved results.
4
Kleyn, Judith. "The performance of the preliminary test estimator under different loss functions." Thesis, University of Pretoria, 2014. http://hdl.handle.net/2263/43132.
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In this thesis different situations are considered in which the preliminary test estimator is applied and
the performance of the preliminary test estimator under different proposed loss functions, namely
the reflected normal , linear exponential (LINEX) and bounded LINEX (BLINEX) loss functions is
evaluated. In order to motivate the use of the BLINEX loss function rather than the reflected
normal loss or the LINEX loss function, the risk for the preliminary test estimator and its component
estimators derived under BLINEX loss is compared to the risk of the preliminary test estimator and
its components estimators derived under both reflected normal loss and LINEX loss analytically (in
some sections) and computationally. It is shown that both the risk under reflected normal loss and
the risk under LINEX loss is higher than the risk under BLINEX loss. The key focus point under
consideration is the estimation of the regression coefficients of a multiple regression model under two
conditions, namely the presence of multicollinearity and linear restrictions imposed on the regression
coefficients. In order to address the multicollinearity problem, the regression coefficients were
adjusted by making use of Hoerl and Kennard’s (1970) approach in ridge regression. Furthermore,
in situations where under- or overestimation exist, symmetric loss functions will not give optimal
results and it was necessary to consider asymmetric loss functions. In the economic application,
it was shown that a loss function which is both asymmetric and bounded to ensure a maximum
upper bound for the loss, is the most appropriate function to use. In order to evaluate the effect
that different ridge parameters have on the estimation, the risk values were calculated for all three
ridge regression estimators under different conditions, namely an increase in variance, an increase
in the level of multicollinearity, an increase in the number of parameters to be estimated in the
regression model and an increase in the sample size. These results were compared to each other
and summarised for all the proposed estimators and proposed loss functions. The comparison of the
three proposed ridge regression estimators under all the proposed loss functions was also summarised
for an increase in the sample size and an increase in variance.Thesis (PhD)--University of Pretoria, 2014.
lk2014
Statistics
PhD
Unrestricted
5
Ávila, Díaz Paulina, and Baéz Javiera Leiva. "Obtención de parametros normativos de Ítems evolutivos e indicadores emocionales del test dibujo de la figura humana de Koppitz para niños y niñas chilenos de la Región Metropolitana entre cinco y siete años provenientes de los sectores socioeconómicos bajo y medio." Tesis, Universidad de Chile, 2013. http://repositorio.uchile.cl/handle/2250/114040.
Full textAbstract:
PsicólogaNo autorizado por el autor para ser publicada a texto completo en Cybertesis
En Chile, el DFH es ampliamente utilizado en la evaluación psicológica infantil. Por ello, se pretendió establecer los parámetros normativos de los 30 ítems evolutivos y 30 indicadores emocionales para niños/as de la Región Metropolitana, entre cinco y siete años de edad, provenientes de estratos bajo y medio. Desde un enfoque cuantitativo se analizaron 180 DFH, para evaluar las frecuencias de aparición de los signos gráficos respecto a las variables sexo, edad y nivel socioeconómico. Se encontraron diferencias estadísticamente significativas en la graficación de los signos por sexo y edad y sutiles diferencias en relación al nivel socioeconómico. Además se compararon los resultados con los obtenidos por Koppitz, hallándose (valídez). Se destaca la relevancia de interpretar el DFH y otras pruebas psicológicas a partir de normas locales representativas de la población chilena.
6
Ekramian, Elnaz. "Automation of the test methods for packet loss and packet loss duration in the Ixia platform." Thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-16018.
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Today’s technology has a strong tendency towards automation. As a matter of fact, the tremendous improvement of science in the recent years brought new ideas regarding to accelerate the scientific process that is not separated of automation. This paper also deals with automation of manual tests that were used to analyze packet loss and packet loss duration in a network. These two metrics were chosen based on their importance they have in the communication technology, also based on the weak points that were found in the manual processes. This experiment is done in the Ixia platform that was an appropriate test bed to design an automation framework.After a comprehensive research on network and communication we could choose packet loss and packet loss duration as two important parameters that are under test several times per day. Therefore, based on the properties that are used for automation, these two metrics had the priority compare to other metrics. We could create a framework that works correspond to the manual test process. For this purpose, Tcl programming language is used. The script that was written with this high-level language can communicate with the graphical user interface, configuring all the connected devices, measuring mentioned metrics and ultimately save the result in a csv file.Finally, we could reach to the main objective of this project which was to show how positively automatic method can affect on the quality of test in terms of accuracy, time and manpower saving.
7
Preuss, Jason Lee. "Design and analysis of a composite flywheel preload loss test rig." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/100.
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Flywheel energy storage units have become a viable alternative to electrochemical batteries in applications such as satellites, uninterrupted power supplies, and hybrid vehicles. However, this performance is contingent upon safe operation since these flywheels can release their stored energy almost instantaneously upon failure. The research presented here investigates a health monitoring technology that may give an early indication of degraded material properties in a concentric ring composite flywheel. The existence of degraded material properties is manifested as a change in mass eccentricity due to asymmetric growth of the outermost flywheel ring. A test rig concept to investigate the technology is developed in detail using a systems engineering design process. Successful detection of the change in mass eccentricity was verified analytically through dynamic modeling of the flywheel rotor and magnetic suspension system. During steady state operation detection was determined to be feasible via measurements of the magnetic bearing currents and shaft position provided by the magnetic suspension feedback sensors. A rotordynamic analysis was also conducted and predicts successful operation to the maximum operating speed of 50,000 Rpm.
8
Abu-Hijleh, Ali. "Effects of high frequency hearing loss on the University of Canterbury Adaptive Speech Test - Filtered Words (UCAST-FW)." Thesis, University of Canterbury. Communication Disorders, 2011. http://hdl.handle.net/10092/6112.
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Objective: The primary purpose of this study was to determine the influence of high frequency peripheral hearing loss on test performance on the University of Canterbury Adaptive Speech Test – Filtered Words (UCAST-FW). We also aimed to investigate (1) if there is an ear advantage in performing the UCAST-FW; (2) whether there is any correlation between the UCAST-FW score and age; (3) the effectiveness of a binaural practice run in reducing the learning effect; and (4) the average time required for older adults to complete the UCAST-FW.
Method: A total of 18 participants with normal hearing (≤ 25 dB Hearing Level (HL) at octave intervals of 250 through 4000 Hz in both ears) and 19 participants with varying degrees of high frequency sensorineural hearing loss (>25 dB HL at frequencies above 1000 Hz) were included in this study. All participants were native New Zealand English speakers, aged between 55-71 years, with normal low frequency hearing (≤25 dB at 250, 500 and 1000 Hz), had speech scores consistent with their audiogram, normal cognition and judged by the examiner to be capable of completing test protocols in terms of sufficient eyesight, alertness and motor control. Participants underwent a full diagnostic hearing test, the Montreal Cognitive Assessment, the Dichotic Digits Test, the Random Gap Detection Test and the UCAST-FW.
Results: Findings indicated that the presence of a high frequency peripheral hearing loss had no significant influence on the UCAST-FW score. Findings also showed no significant ear advantage, or any trend between the participant’s UCAST-FW score and their age. A binaural practice run comprised of 5 initial and 15 working reversals was effective in reducing any learning effect. The UCAST-FW took an average of 15 minutes to complete, and the results showed no correlation between the test completion time and the participant’s age.
Conclusion: Findings suggested that the listener’s high frequency peripheral hearing sensitivity had no significant influence on their UCAST-FW score and thus the UCAST-FW can potentially be an effective test for assessing Auditory Processing Disorder (APD) in older adults and the elderly regardless of their high frequency peripheral hearing sensitivity. The development of test material in New Zealand English, as well as the investigation of the validity of the UCAST-FW in assessing APD in older adults and the influence of cognitive functioning on test performance is necessary before the UCAST-FW can be implemented in New Zealand clinical Audiology settings.
9
Larsson, Björn. "Construction of a Calorimetric Test-rig for Loss Measurements on Induction Machines." Thesis, KTH, Elektrisk energiomvandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-53677.
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This thesis presents the development and construction of a cooling system and a calorimetric set-up for efficiency measurements on an 11 kW induction machine. Direct and indirect methods of efficiency determination and loss segregation is presented. An analytical thermal model of the machine is used for the estimation of different motor temperatures. The results are verified by measurements. The methodology for calibration of the specific set-up is presented and performed. An accuracy of ・} 5 mK for the calorimetric temperature measurements is obtained. Measurements have been performed in order to determine the thermal leakage of the test-setup. It was found that the main leakage path is through the rotor shaft. According the the measurements performed, this leakage is lower than 1.6 % of the active input power.
10
Herrera, Rubio Ximena. "Legalidad de los test pre-ocupacionales en el derecho laboral chileno." Tesis, Universidad de Chile, 2002. http://www.repositorio.uchile.cl/handle/2250/115308.
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Memoria (licenciado en ciencias jurídicas y sociales)No autorizada por el autor para ser publicada a texto completo
El objetivo del presente trabajo es delimitar el concepto de test preocupacional, y determinar si se ajusta a la legalidad o si configuran intromisiones a la vida privada del trabajador. Si son instrumentos discriminatorios, y en caso que así fueran, que medios de defensa tiene el postulante. Se realizó un examen a la doctrina y al derecho comparado, donde el tema es ampliamente tratado, para luego revisar nuestra realidad jurídica y descubrir que recursos posee el postulante para defenderse de los abusos cometidos. Así llegamos a la conclusión que son ilegales aquellas pruebas que investiguen sobre la vida privada del postulante, sin que esos datos sean relevantes para determinar la capacidad e idoneidad necesaria para el trabajo al que se postula. Nuestra legislación nos dio las bases para intentar una clasificación de estas pruebas, para determinar cuales están prohibidas y cuales son obligatorias. Frente a estás posibles intromisiones a la vida privada, hay dos posibles soluciones, a luz de la revisión del derecho comparado, doctrina y dictámenes. Uno es que en la negociación colectiva se agreguen un ítem de solución a los problemas que se producen en la etapa pre contractual, que miembros del sindicato informen a los postulantes respecto de las pruebas a que serán sometidos, y que si los postulantes lo solicitan estén presentes miembros del sindicato, e incorporar al Reglamento Interno de Higiene, Orden y Seguridad, los procedimientos a utilizar para el examen de los postulantes. La otra solución, es una reforma profunda al sistema procedimental laboral, para que frente a los abusos sometidos, al postulante lo resguarde un sistema que se apresure a dar fin al abuso.
11
Schütz, Marika. "Lost on Lolland : Hur skapas spänning i text?" Thesis, Linnéuniversitetet, Institutionen för språk och litteratur, SOL, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-5915.
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Gonzalez, Daniel. "An Adaptation of an Auditory Perception Test." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3772.
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The Auditory Perception Test for the Hearing Impaired, 3rd edition (APT/HI-3) was adapted into an auditory perception assessment tool for Spanish-speaking children called the Auditory Perception Test for the Hearing Impaired—Spanish (APT/HI-S). Test items from the APT/HI-S were then validated by three groups of Spanish-English bilinguals to determine if selected words were developmentally and linguistically appropriate for 3-year old children. Survey results revealed that 37 out of 62 words were considered developmentally and grammatically appropriate. The APT/HI-S was then administered to two 3-year old and two 5-year old children, two with typical hearing and two with hearing loss. Results revealed that language proficiency played an integral role in the measurement of auditory perception skills. The children demonstrated better performance when tested in their dominant language, reinforcing the need to have a language-specific assessment tool to obtain a more accurate picture of auditory and speech perception skills in children.
13
Holmeide, Ø., and M. Schmitz. "USE OF GIGE VISION ETHERNET CAMERAS FOR FLIGHT TEST APPLICATIONS WITHOUT DATA LOSS." International Foundation for Telemetering, 2016. http://hdl.handle.net/10150/624225.
Full textAbstract:
As Ethernet based networks have become the dominant choice for Flight Test Instrumentation
(FTI) network applications, it is also clear that Ethernet based camera integration and applications
have yet to become more wide spread for system level design and integration. A significant
customer base utilizes either separate video compression systems or even just stand-a-lone gopro
cameras for recording purposes in an unsynchronized ways. The use of uncompressed high
definition (HD) video from GigE Vision Ethernet cameras for flight test applications is a
significant issue in managing the large volumes of data produced by the cameras and forwarding
them to any 1000BASE-T(x) switch port without packet loss and significant delays. Of course an
easy approach to overcome this issue would be to just increase the network bandwidth from
1000BASE-T(x) to 10GBASE-SR, but most FTI systems just moved to 1000BASE-T(x) in the
past years and therefore changing the overall system hardware is cost prohibited. One concern
has been the use of compression algorithms to reduce the required video bandwidth, with the
negative side effect that the image quality reduces and end-to-end latency increases, which is not
acceptable for some applications. Further, it is important that data from cameras is available to a
number of different multicast consumers within the FTI network, for example workstations,
recorders and telemetry systems. These video data stream also require synchronization so that
they can be analyzed in post processing.
14
Hoque, Zahirul. "Improved estimation for linear models under different loss functions." University of Southern Queensland, Faculty of Sciences, 2004. http://eprints.usq.edu.au/archive/00001438/.
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This thesis investigates improved estimators of the parameters of the linear regression models with normal errors, under sample and non-sample prior information about the value of the parameters. The estimators considered are the unrestricted estimator (UE), restricted estimator (RE), shrinkage restricted estimator (SRE), preliminary test estimator (PTE), shrinkage preliminary test estimator (SPTE), and shrinkage estimator (SE). The performances of the estimators are investigated with respect to bias, squared error and linex loss. For the analyses of the risk functions of the estimators, analytical, graphical and numerical procedures are adopted. In Part I the SRE, SPTE and SE of the slope and intercept parameters of the simple linear regression model are considered. The performances of the estimators are investigated with respect to their biases and mean square errors. The efficiencies of the SRE, SPTE and SE relative to the UE are obtained. It is revealed that under certain conditions, SE outperforms the other estimators considered in this thesis. In Part II in addition to the likelihood ratio (LR) test, the Wald (W) and Lagrange multiplier (LM) tests are used to define the SPTE and SE of the parameter vector of the multiple linear regression model with normal errors. Moreover, the modified and size-corrected W, LR and LM tests are used in the definition of SPTE. It is revealed that a great deal of conflict exists among the quadratic biases (QB) and quadratic risks (QR) of the SPTEs under the three original tests. The use of the modified tests reduces the conflict among the QRs, but not among the QBs. However, the use of the size-corrected tests in the definition of the SPTE almost eliminates the conflict among both QBs and QRs. It is also revealed that there is a great deal of conflict among the performances of the SEs when the three original tests are used as the preliminary test statistics. With respect to quadratic bias, the W test statistic based SE outperforms that based on the LR and LM test statistics. However, with respect to the QR criterion, the LM test statistic based SE outperforms the W and LM test statistics based SEs, under certain conditions. In Part III the performance of the PTE of the slope parameter of the simple linear regression model is investigated under the linex loss function. This is motivated by increasing criticism of the squared error loss function for its inappropriateness in many real life situations where underestimation of a parameter is more serious than its overestimation or vice-versa. It is revealed that under the linex loss function the PTE outperforms the UE if the nonsample prior information about the value of the parameter is not too far from its true value. Like the linex loss function, the risk function of the PTE is also asymmetric. However, if the magnitude of the scale parameter of the linex loss is very small, the risk of the PTE is nearly symmetric.
15
Copher, Madison. "Pilot Study of Text Message Nudges as a Way to Improve Weight Loss Outcomes." UKnowledge, 2019. https://uknowledge.uky.edu/foodsci_etds/74.
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Weight loss programs for women are on the rise, including both face to face and online programs. However, current research is limited on the process measures and content which produce adherence and the largest outcomes. With obesity on the rise in the United States, it is important to understand out health coaches can strengthen their programs to better support the obese population in their weight loss journey. The purpose of this pilot study was to develop and test the acceptability of text message nudges among women participating in an online weight loss program; determine how dose may be associated with weight loss outcomes; and to test how goal setting text messaging nudges improve percent body weight loss among women participating in an online weight loss program. It was found that the implementation of text message nudges did not provide enough to continue to improve and extend the program to be more successful. However, qualitative data was recorded and found to provide helpful insight into what content was preferred by the participants.
16
Murray, Christa Jane. "Development of a Māori Language Version of the New Zealand Hearing Screening Test." Thesis, University of Canterbury. Communication Disorders, 2012. http://hdl.handle.net/10092/7132.
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Hearing loss has a prevalence of 10.3% in New Zealand, with the Māori population being disproportionately affected compared to the non-Māori population. Hearing loss is an impairment that is under-recognised, under-reported and under-treated. This can be explained by the many existing barriers – the shortage of audiological services, financial cost to an individual seeking treatment, the stigma of both hearing loss and hearing aids, and healthcare seeking rates, particularly among the Māori population. This study aimed to develop a Māori language adaptive digit triplet test that could be offered remotely via the telephone and Internet as a hearing-screening test.
Three sets of recordings were made of digit triplets spoken in te reo Māori by a female speaker. Two of these sets were selected for normalisation in speech noise. Normal-hearing participants (8 listeners) with hearing thresholds ≤20 dB HL were tested to establish the intelligibility of the individual recorded digits at various signal-to-noise ratios (-13, -10.5, -8 and -5.5 dB). Psychometric functions were fitted to the intelligibility data, and the digits in each position of the triplet that had the steepest slope were selected as the final test stimuli. The level of each selected digit was then adjusted to achieve equal intelligibility as measured at the midpoints of the psychometric functions. These digits were then assembled into eight equivalent lists of similar difficulty, ready for pilot testing.
Due to low participant numbers, the pilot testing phase was not completed. Further development of this test continues as the focus of a follow-on study.
17
Murray, Peter G. "Measurement of the mechanical loss of test mass materials for advanced gravitational wave detectors." Thesis, University of Glasgow, 2008. http://theses.gla.ac.uk/565/.
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Einstein's General Theory of Relativity (1916) predicted the existence of gravitational waves. These waves can be considered as fluctuations, or ripples, in the curvature of space-time. Until now there has been only indirect evidence, produced by Hulse and Taylor, of their existence. However, for many years various groups of scientists around the world have been developing ultra-sensitive instruments and techniques which are expected to be capable of detecting gravitational wave signals. The direct detection of these waves will provide new information about the astrophysical processes and sources which produce them. Gravitational radiation is quadropole in nature, producing orthogonal stretching and squeezing of space. The resulting fluctuations in distance are, however, very small, with gravitational waves emmitted from violent astrophysical phenomena expected to produce strains in space of the order ~10 [superscript -22] over relevant timescales. One technique for detecting such strains is based on a Michelson Interferometer. The Institute for Gravitational Research at the University of Glasgow under the leadership of Professor James Hough, has been an active contributor of research targeted towards the detection of gravitational waves for over 35 years. A strong collaboration exists with the Albert-Einstein-Institut in Hanover and Golm, the University of Hanover and the University of Cardiff. This collaboration has developed and constructed a laser interferometer, with arms of 600 m length, in Germany named GEO600. The research presented in this thesis details experiments undertaken on materials and techniques used in current interferometric detectors and for proposed future detectors. The aim of this research is to investigate methods of reducing the levels of mechanical loss associated with the detector optics and thereby minimise the impact of thermal noise on the overall sensitivity of detectors.
18
Crooks, David R. M. "Mechanical loss and its significance in the test mass mirrors of gravitational wave detectors." Thesis, University of Glasgow, 2002. http://theses.gla.ac.uk/2893/.
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The work of this thesis involves the analysis of mechanical losses associated with coated test masses manufactured from fused silica, to determine the existence and level of excess loss associated with the coatings on these substrates. In particular, a major part of this analysis requires the calculation of the ratio of the strain energy stored in the dielectric coating to the strain energy stored in the substrate for a number of the resonant modes of the test mass. This is extremely difficult to calculate analytically for all but the simplest of modes. Finite element analysis had to be used to calculate the modeshapes of a number of resonant modes of the test masses. A piece of analytical software was specifically written to use the output of the finite element analysis package to calculate these energy ratios. The majority of this thesis is concerned with the methodology and usage of this software in the context of a number of analyses of different coated test masses. In addition, a technique was developed to allow experimental determination of modeshapes. This method could then be used to confirm or identify the nature of different modes. An initial investigation suggested that the loss associated with the coating s may prove significant for future generations of detectors such as Advanced LIGO. Further investigations suggested that the principle source of coating loss was due to the materials used in the coatings themselves. These investigations also suggested that for the coatings used, which were manufactured using tantalum pentoxide and silica, the tantalum pentoxide had a higher mechanical loss than the silica. Investigations into different coating materials have been initiated. Finally, preliminary tests on a coated sapphire mirror have been completed which give an upper limit to the loss of a coating on a sapphire mass. These tests required comprehensive changes to be made to the analytical energy ratio software to allow the analysis of anisotropic materials such as sapphire and to allow the output from different finite element packages to be used.
19
Hennies, Johannes, Martina Penken, Monika Rothweiler, Eva Wimmer, and Markus Hess. "Der FinKon-Test : ein neues sprachaudiometrisches Verfahren zur Phonemwahrnehmung bei hörgeschädigten Kindern." Universität Potsdam, 2014. http://opus.kobv.de/ubp/volltexte/2014/7144/.
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Bei vielen schwerhörigen Kindern lassen sich Sprachentwicklungsverzögerungen oder Sprachentwicklungsstörungen im Bereich der Morphologie und Syntax beobachten. Noch ist nicht abschließend geklärt, wie diese Schwierigkeiten durch die Probleme im auditiven Bereich genau verursacht werden. Der vorliegende Beitrag beschäftigt sich mit der Wahrnehmbarkeit koronaler Konsonanten, die im Deutschen u. a. als Verbflexive fungieren. Der neue sprachaudiometrische FinKon-Test erfasst die Fähigkeit, diese Konsonanten im Wortauslaut auditiv wahrzunehmen und zu unterscheiden. In einer Pilotstudie mit 22 schwerhörigen und 15 hörenden Kindern erzielten Kinder mit einer Beeinträchtigung des Hörens schlechtere Ergebnisse als hörende Kinder. Die spezifische Schwierigkeit, Phoneme im Auslaut zu unterscheiden, kann den Erwerb der Verbflexion des Deutschen für schwerhörige Kinder deutlich erschweren. Daher ist es wichtig, die Wahrnehmung von Konsonanten im Auslaut im Rahmen der sprachaudiometrischen Überprüfung des kindlichen Hörvermögens mit einem entsprechenden diagnostischen Instrument, wie dem FinKon-Test, zu überprüfen.
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Mondelli, Maria Fernanda Capoani Garcia. "Desempenho de crianças com perda auditiva leve no teste da habilidade de atenção auditiva sustentada - THAAS." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/61/61131/tde-12112007-145751/.
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Objetivo: Verificar o desempenho de crianças diagnosticadas com deficiência auditiva, de grau leve, condutiva e sensorioneural, no Teste da Habilidade de Atenção Auditiva Sustentada (THAAS) visando constatar se este teste sofre influência da presença de uma deficiência auditiva. Modelo: Estudo do Teste da Habilidade de Atenção Auditiva Sustentada-THAAS em três grupos: grupo 1 (G1) grupo controle, formado por crianças com audição normal; grupo 2 (G2) crianças com deficiência auditiva sensorioneural bilateral de grau leve e grupo 3 (G3) composto por crianças com perda auditiva condutiva bilateral de grau leve. Local: Divisão de Saúde Auditiva ? Hospital de Reabilitação de Aanomalias Craniofaciais ?Universidade de São Paulo (HRAC/USP). Participantes: 90 crianças com idade entre 7 e 11 anos de idade, sendo 30 de cada grupo. Intervenções: Audiometria Tonal Limiar, Imitanciometria e THAAS Resultados: não houve indícios estatisticamente significativos entre sexo e idade, em todos os grupos estudados. Os grupos sensorioneural e condutivo apresentaram desempenho inferior ao grupo controle, em todas as respostas do THAAS. Conclusões: o teste THAAS sofreu influência das perdas auditivas de grau leve, condutivas e sensorioneurais na população estudada, sendo o pior comprometimento para perdas sensorioneurais.Objective: To verify the performance of children diagnosed with a hearing loss of mild degree, conductive and sensorineural, at Sustained Auditory Attention Ability Test (SAAAT), aiming to observe if this test suffers the influence of the presence of a hearing loss. Model: A study of the Sustained Auditory Attention Ability Test ? SAAAT in three groups: group 1 (G1) control group comprising children with normal hearing, group 2 (G2) children with a bilateral sensorineural hearing loss of a mild degree and group 3 (G3), comprising children with a bilateral conductive hearing loss of a mild degree. Place: Division for Hearing Health ? Craniofacial Anomaly Rehabilitation Hospita, University of São Paulo (HRAC/USP). Participants: 7 to 11 year old children, 30 for each group. Interventions: Pure Tone Audiometry, Immitance Acoustic and SAAAT. Results: There were not any statistically significant indications between sex and age in all studied groups. Sensorineural and conductive groups showed a lower performance related to control group in all answers for SAAAT. Conclusions: SAAAT test suffered the influence of conductive and sensorineural hearing losses of light degree in studied population, the worse compromise occurring for sensorineural losses.
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Cheatham, Christopher. "Statistical analysis of fastener vibration life tests." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002275.
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Ek, Cecilia. "Lost and gained in translation : Pragmatic markers in an English source text andits Swedish target text." Thesis, Linnéuniversitetet, Institutionen för språk (SPR), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-65437.
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This study analyses the translation of some pragmatic markers in an informal English non-fiction text and its Swedish target text. The pragmatic markers in focus are interjections, modal adverbs and question tags, and the sources of the Swedish modal particle ju are also analysed. While pragmatic markers are more common in spoken language or fiction, in this case they were considered important to the interpersonal function and casual style of the non-fiction text. The results were also compared to data from a non-fiction parallel corpus. In total, the ST contained 31 of the selected types of pragmatic markers, compared to 29 in the TT. However, there were considerable variations between types of marker, with less than a quarter being translated as the same type (e.g., interjection as interjection); this reflects the fact that the two languages inherently prefer different types of markers in some cases, with question tags being considerably more common in English, while the modal particles were the most common pragmatic markers in Swedish. There were no zero translations of pragmatic markers, indicating that they were not considered as superfluous or optional as might be indicated in previous research. The fact that ju most commonly had a zero source (in the corpus examples as well), and so was ‘added’ in translation, illustrates the lack of clear translation equivalents for many common pragmatic markers, as well as the translator’s attempt to domesticate the TT.
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Sneddon, Peter Howard. "Investigation of internal mechanical loss factors of test mass materials for interferometric gravitational wave detection." Thesis, University of Glasgow, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249943.
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Grange, Meghan Elizabeth. "Test-retest Reliability in Word Recognition Testing in Subjects with Varying Levels of Hearing Loss." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3480.
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The purpose of this study was to determine the test-retest reliability of digitally recorded word recognition materials. Word recognition testing is included in a complete audiological evaluation to measure an individual's ability to discriminate what they hear. A phonetically balanced list of 50 monosyllabic words was presented to each participant at four different sensation levels (SL) using the American Speech Language Hearing Association recommended protocol for word recognition score testing. Each participant took a 10 minute break before the test was readministered. Participants included 40 subjects with varying levels of hearing loss, from normal hearing to severe hearing loss. The test and retest scores of all participants were analyzed to estimate the test-retest reliability to be .65 at 10 dB SL, .87 at 20 dB SL, .88 at 30 dB SL, and .95 at 40 dB SL. It was concluded that the word lists have strong test-retest reliability at 20, 30, and 40 dB SL and that the reliability increases as the presentation level increases.
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Motlagh, Zadeh Lina. "Developing a digits in noise screening test with higher sensitivity to high-frequency hearing loss." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1552378973670023.
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José, Maria Renata. "Desempenho de idosos no teste da habilidade de atenção auditiva sustentada - THAAS." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/25/25143/tde-28012014-153356/.
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A atenção é uma habilidade importante para o bloqueio de ruídos ambientais competitivos ao estímulo de interesse do sujeito, principalmente para os idosos, que podem apresentar maior dificuldade em consequência de perdas auditivas decorrentes do envelhecimento, tal como a presbiacusia. Assim, a pesquisa em questão, visa verificar o desempenho de idosos com e sem diagnóstico de perda auditiva leve em um teste comportamental da habilidade de atenção auditiva sustentada e, comparar os resultados obtidos nos grupos de idosos com um grupo de adultos com audição periférica normal, visando constatar a influência que esta habilidade de atenção sofre no processo de envelhecimento, assim como, em consequência da privação sensorial de uma perda auditiva de grau leve, utilizando como instrumento o Teste da Habilidade de Atenção Auditiva Sustentada THAAS (FENIMAN, 2004). O THAAS é um método utilizado para avaliar a atenção auditiva, por meio da avaliação da habilidade do sujeito de escutar estímulos auditivos durante um período de tempo prolongado e responder somente para o estímulo específico. As tarefas exigidas são a vigilância auditiva e atenção auditiva sustentada. O desempenho no teste é verificado pela pontuação total dos erros (somatória dos erros desatenção e impulsividade) e o decréscimo de vigilância. Fizeram parte deste estudo 60 idosos (com idade igual ou superior a 60 anos) e, 30 sujeitos adultos (faixa etária entre 18 a 30 anos), de ambos os gêneros. Os participantes da pesquisa foram divididos em três grupos: GI: constituído por 30 idosos com audição periférica normal bilateralmente; GII: por 30 idosos com diagnóstico de perda auditiva sensorioneural bilateral de grau leve; e, GIII: constituído por 30 adultos, com audição periférica normal bilateralmente. O processo de avaliação de todos os participantes constituiu-se da aplicação do Questionário de atenção, Audiometria Tonal Liminar, Logoaudiometria, Imitanciometria e do THAAS. Para análise estatística foram realizados os testes Kruskal-Wallis, Miller, Mann- Whitney e coeficiente de correlação de Spearman, considerando diferença estatisticamente significante quando p≤0,05. As médias obtidas para a pontuação total de erros foram: GI: 6.2 (desatenção 1.9 e impulsividade 4.3); GII: 9.2 (desatenção 3.6 e impulsividade 5.6); e, GIII: 2.5 (desatenção 1.7 e impulsividade 0.8). Em relação ao decréscimo de vigilância, as médias verificadas foram: 0.5, 0.8 e 0.4 para os grupos GI, GII e GIII, respectivamente. Houve correlação entre a variável idade e decréscimo de vigilância (p=0.04). Por meio deste estudo observou-se que os grupos de idosos (GI e GII) apresentaram piores escores na pontuação total de erros em relação ao grupo de adultos (GIII), com maior ocorrência de erros de impulsividade e desatenção quando comparados com o grupo dos adultos; a perda auditiva não foi um fator que influenciou no tipo de erro mais frequentemente observado no THAAS (desatenção ou impulsividade), no entanto, a perda auditiva influenciou negativamente no desempenho do teste, na qual idosos do GII obtiveram maior pontuação total de erros do que àqueles sem perda auditiva (GI); e, o aumento da idade foi um fator que influenciou a perda do foco atencional durante a realização de uma tarefa auditiva nos grupos estudados.Attention is an important skill to block environmental noise competitive to the interest stimulus of the subject, mainly for the elderly, who may present a higher difficulty in consequence of hearing losses due to aging, such as presbycusis. Therefore, the research aims to verify the performance of the elderly with and without a diagnosis of mild hearing loss in a behavioral test of sustained auditory attention and compare the results obtained in elderly groups with a group of adults with normal hearing in order to find the influence that this attention skills suffer in the aging process, even as, a consequence of sensory deprivation of a mild hearing loss, using as instrument the Sustained Auditory Attention Ability Test - SAAAT (FENIMAN, 2004). The SAAAT is a method used to evaluate the auditory attention by evaluating the subjects ability to listen to auditory stimuli over a prolonged period, and respond only to the specific stimulus. The tasks required are the auditory vigilance and sustained auditory attention. The test performance is verified by the total error score (the result of a sum of inattention errors and impulsivity) and the vigilance decrement. Participated in the study 60 elderly (aged over 60) and 30 adult subjects (aged 18 to 30) of both genders. Research participants were divided into three groups: GI: consisted of 30 elderly with bilaterally normal hearing, GII: 30 elderly diagnosed with mild hearing loss, sensorineural and bilateral, GIII: consisting of 30 adults with bilaterally normal peripheral hearing. The assessment process of all participants consisted of applying Attention Questionnaire, pure tone audiometry, speech audiometry, immittance and SAAAT. Statistical analysis was performed through Kruskal-Wallis, Miller, Mann-Whitney and Spearman correlation coefficient tests. Results were considered statistically significant when P value was less than 0.05. The averages for the total error score were: GI: 6.2 (1.9 inattention and 4.3 impulsivity), GII: 9.2 (3.6 inattention and 5.6 impulsivity) and GIII: 2.5 (1.7 inattention and 0.8 impulsivity). In relation to vigilance decrement the average observed was 0.5, 0.8 and 0.4 for groups GI, GII and GIII, respectively. There was a correlation between the age variable and vigilance decrement (p=0.04). In this study it was observed that the elderly groups (GI and GII) presented the worst scores on the total error score in relation to the adult group (GIII), with higher incidence of impulsivity and inattention errors compared with the adult group; hearing loss was not a factor that influenced the type of error most frequently observed in SAAAT (inattention or impulsivity), however, hearing loss negatively affected the performance of the test, in which the elderly of GII scored higher than total error score than those without hearing loss (GI) and aging was a factor that influenced in the loss of attentional focus while performing in an auditory task in the groups studied.
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Wang, Xin. "Bounded Multiattribute Utility in Behavioral Decision Research: Theory, Estimation and Experimental Tests." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406821794.
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Gustafsson, Filip. "Wet clutch load modeling for powershift transmission bench tests." Thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-33263.
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In this thesis a model is developed for calculating the loads on the wetclutches in apowershift transmission. This thesis was done at Volvo CE in Eskilstuna and is focusedon their 4-speed countershaft transmissions. The goal of the project is to be able tocalculate the loads automatically during the transmission tests and thus acquire increasedknowledge about what occurs during operation.The model was developed by first generating a number of concepts and then evalu-ating them to decide which one should be developed further. The chosen concept wasthen developed further and implemented into the test equipment as a calculation script.The chosen loads to model were the energy absorbed in each clutch, the coefficient offriction (COF) and the slip distance. The COF was later found to give too unreliableresults to be used in any other way than as a benchmark for how well the model wasconfigured and to see any large changes in COF.The model was validated by calculating the energy absorbed in a HTE-200 seriestransmission and comparing it to a reference calculation model. It was seen that theresults from the new model are very close to the reference result. The energy lostcalculated by the new model will be equal to 94 % of the energy lost calculated by thereference model, but only when measuring the inertia phase. The energy lost is equalto 135 % when the torque phase is included. The increasing difference is believed tobe because of an error in the reference model that means it does not cover the torquephase.
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Li, Qi. "Transmission loss of vehicle seals." Licentiate thesis, Stockholm : Farkost och flyg, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9792.
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Marín, Rubio Ingrid. "Nuevas aproximaciones metolodógicas para el diagnóstico de los trastornos motores esofágicos con manometría de alta resolución." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/669908.
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En la actualidad el diagnóstico de los trastornos motores esofágicos con manometría de alta resolución se basa en los criterios de Chicago, obtenidos por el análisis de 10 degluciones simples de 5 ml. En la presente tesis se han evaluado la utilidad de un test de sobrecarga, que consiste en la ingesta rápida de 200 ml de agua, en el diagnóstico y seguimiento de los trastornos motores esofágicos estudiados mediante manometría esofágica de alta resolución. Para ello, se han evaluado las respuestas presivas del cuerpo esofágico y de la UEG producidas por el test de sobrecarga de en las diferentes patologías motoras esofágicas. Con ello, observamos que diferentes patologías motoras esofágicas presentan respuestas presivas diferentes al test y establecimos con elloasí unos patrones de respuestas motoras específicos para cada uno grupo de los trastornos motores. Estos patrones son el patrón normal o hipopresivo, que presentan los sujetos sanos y los pacientes con trastornos motores hipotensivos o menores, el patrón hiperpresivo breve o no obstructivo, que comparten los pacientes con diagnóstico de esófago hipercontráctil y espasmo esofágico y por último el patrón obstructivo que presentan aquellos pacientes con acalasia., correlacionándose también con la clínica referida por los pacientes
Una vez establecidos los patrones, se realizó el test en una amplia cohorte de sujetos sanos de diferentes países para se establecieron los valores de normalidad al test de sobrecarga con agua de los diferentes parámetros presivos.
Por último, se determinó la capacidad del test para Además se han utilizado estos patrones de respuesta presivas paravalorar la respuesta las respuestas al tratamiento en los pacientes con obstrucción a través de la UEG debida a acalasia y se observó que el tratamiento exitoso de estos se asociaba a la desaparición del patrón obstructivo en respuesta al test de sobrecarga. AsíPor lo tanto, los patrones de respuesta motora específicos al test de sobrecarga, resultan una herramienta útil en el diagnóstico y seguimiento de los pacientes con trastornos motores esofágicos y permiten valorar de manera objetiva la repercusión de los mismos sobre el vaciamiento esofágico, lo que puede resultar de gran ayuda para decidir el tratamiento o la necesidad de retratamiento de los pacientes.The gold standard for the diagnosis of esophageal motor disorders is based on the data obtained at the individual analysis of 10 swallows of 5 ml of water performed by HRM, in supine position. These measurements obtained, and according to the Chicago criteria, will give us the diagnosis. In the present thesis we have been evaluating the utility of an overload intake, which consists in the rapid intake of 200 ml of water. To do this, the pressures of the esophageal body and the UEG produced by the challenge test in the different esophageal motor pathologies have been evaluated. With this, we observe that different esophageal motor pathologies have different pressive responses to the test and thus establish specific motor response patterns for each group of motor disorders. These patterns are the normal or hypopressive pattern, presented by healthy subjects and patients with hypotensive or minor motor disorders, the brief or non-obstructive hyperpressive pattern, shared by patients diagnosed with a hypercontractile esophagus and esophageal spasm and finally the obstructive pattern, observed in patients with achalasia. Once the patterns were established, the test was performed in a large cohort of healthy subjects from different countries, to establish normal values for the challenge test of the different pressive parameters. Finally, the ability of the test to assess the response to treatment responses in patients with obstruction due to achalasia was determined and it was observed that the successful treatment of these was associated with the disappearance of the obstructive pattern in response to the challenge test. Thus, the specific motor response patterns to the RDC test are a useful tool in the diagnosis and follow up of patients with esophageal motor disorders and they allow an objective assessment of their impact on esophageal emptying, which can be a useful tool to decide the treatment or the retreatment need for these patients.
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Flores-Mazulis, María-Fernanda. "Propiedades psicométricas de la escala de estrés cotidiano infantil en niños de 3ero a 5to grado de primaria de colegios de Lima Metropolitana." Bachelor's thesis, Universidad de Lima, 2017. http://repositorio.ulima.edu.pe/handle/ulima/3571.
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La presente investigación tuvo como objetivo construir la Escala de Estrés Cotidiano Infantil (EECI) y reportar sus propiedades psicométricas. La prueba fue aplicada en 421 niños y niñas de 3ero, 4to y 5to grado de primaria de colegios públicos y privados de Lima Metropolitana. Se proporcionan evidencias de validez relacionadas al
contenido de la prueba por medio de un criterio de jueces conformado por nueve
expertos.Tesis
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Theunissen, Marianne. "Development of an Afrikaans test for sentence recognition in noise." Diss., Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-12152008-131712.
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Possani, Lissi Nara Amaral. "Estudo da prevalência e das características do zumbido em trabalhadores expostos ao ruído ocupacional." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2006. http://hdl.handle.net/10183/7309.
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Introdução: O zumbido é definido como uma sensação auditiva ilusória sem a presença de um som externo. Acomete homens e mulheres, mais comumente entre 40 e 70 anos de idade, às vezes podendo ocorrer em crianças. Análises de dados epidemiológicos indicam que a exposição ao ruído é uma das causas mais comuns de zumbido. Objetivos: Os objetivos gerais deste estudo foram verificar a prevalência do zumbido em trabalhadores expostos ao ruído ocupacional e avaliar a freqüência e a intensidade do zumbido. Os objetivos específicos foram avaliar a gravidade do zumbido; analisar a presença do zumbido por sexo, cor, idade e tempo de trabalho com exposição ao ruído e analisar a relação do zumbido com as freqüências mais acometidas na audiometria e com a presença e grau da perda auditiva, independente do nexo da perda. Materiais e Métodos: Trata-se de um estudo transversal para o qual foram selecionados 362 prontuários de trabalhadores expostos a ruído ocupacional ≥80dB(NA)/8h diárias. Estes trabalhadores haviam sido submetidos a meatoscopia, anamnese clínica e ocupacional, audiometria de via aérea, avaliação de freqüência e intensidade do zumbido e à escala de avaliação da gravidade do zumbido. Conclusão: A prevalência do zumbido foi de 9,9%. Nas análises de regressão conclui-se que trabalhadores com presença de perda auditiva em pelo menos um dos ouvidos têm 2,396 vezes mais chances de ter zumbido quando comparados com os que não tem perda auditiva. Os trabalhadores com faixa etária acima ou igual a 30 anos tem 5,353 vezes mais chances de ter perda auditiva em pelo menos um dos ouvidos quando comparados com os de faixa etária menor que 30 anos. Com relação ao tempo de trabalho em contato com o ruído, a analise estatística revela que trabalhadores com diferença de 1 ano no tempo de trabalho em contato com ruído tem um risco 5,3 % (OR=1,053) maior de apresentar perda auditiva.Background: Tinnitus is an auditory phantom sensation experienced when no external sound is present. It occurs in both men and women, and is more prevalent between the age of 40 and 70; however, it may also occur in children. Analyses of epidemiologic data indicate that exposure to noise is its most common cause. Object: The aim of this study was to investigate the prevalence and characteristics of tinnitus in noise-exposed workers. Its specific objectives were to evaluate the severity of tinnitus, to compare the presence of tinnitus with the individual’s sex, race, age, and time of exposure to noise in the workplace, and to analyze the relation between tinnitus and the most affected frequencies in audiometric tests as well as the presence and level of hearing loss. Materials and Methods: The present was a cross-sectional study for which 362 files of workers exposed to noise (≥80dB(A)/8h per day) were selected. These workers had undergone otoscopy, clinical and occupational anamnesis, audiometric test of ear conduction, and an investigation of frequency, intensity, and severity of tinnitus. Conclusion: The prevalence of tinnitus found was 9.9%. After logistic regression analyses, it was concluded that workers with hearing loss in at least one ear have 2.396 times more chance of having tinnitus than those who do not have hearing loss. Workers aged 30 or older have 5.353 times more chance of having hearing loss in at least one ear than those younger than 30. As to time of exposure to noise in the workplace, statistical analysis showed that workers with a difference of 1 year in time of exposure to noise have a 5.3% (OR=1.053) higher risk of suffering hearing loss.
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Murnane, Owen D. "Novel Video Head Impulse Findings in an Asymptomatic Individual with Unilateral Vestibular Loss." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/1926.
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Baxter, Thomas. "The development and application of the load-stroke hysteresis technique for evaluating fatigue damage development in composite materials." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-09052009-040716/.
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Burga, León Andrés. "The unidimensionality of a measurement instrument: A factorial perspective." Pontificia Universidad Católica del Perú, 2012. http://repositorio.pucp.edu.pe/index/handle/123456789/100447.
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This article explains what we mean by the unidimensionality of a measurement instrument, therefore we present some definitions and theoretical contributions about this subject. Factor analysis is proposed as one of the many methods for assessing the unidimensionality of a measurement instrument. The use of Pearson correlations matrices on item-level factor analysis is identified as an important problem. Those correlations are problematic because items didn’t carry out the necessary assumptions in order to apply the Pearson correlation: interval-level measurement and normal distribution of the variable. As an alternative we propose and exemplify the use of tetrachoric and polychoric correlations.Este artículo explica qué es lo que implica la unidimensionalidad de un instrumento de medición. Para ello se presentan algunas definiciones y aportes teóricos sobre el tema. Luego, el análisis factorial es propuesto como uno de los métodos para evaluar la dimensionalidad de un instrumento de medición. Se señala como un problema importante el uso de las matrices de correlaciones de Pearson en los análisis factoriales a nivel de ítems. Estas correlaciones son problemáticas porque los ítems no cumplen con los supuestos necesarios para aplicar la correlación de Pearson: nivel de medición de intervalo y distribución normal de la variable. Como alternativa se postula y ejemplifica el uso de las correlaciones tetracóricas y policóricas.
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Engelbrecht, Jenni-Mari. "Development and validation of a South African English smartphone-based speech-in-noise hearing test." Thesis, University of Pretoria, 2017. http://hdl.handle.net/2263/63731.
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Approximately 80% of the adult and elderly population ≥65 years have not been assessed or treated for a hearing loss, despite the effect a hearing loss has on communication and quality of life (World Health Organization [WHO], 2013a). In South Africa, many challenges to the health care system exist of which access to ear and hearing health care is one of the major problems. This study aimed to develop and validate a smartphone-based digits-in-noise hearing test for South African English towards improved access to hearing screening. The study also considered the effect of hearing loss and English speaking competency on the South African English digits-in-noise hearing test to evaluate its suitability for use across native (N) and non-native (NN) speakers. Lastly, the study evaluated the digits-in-noise test’s applicability as part of the diagnostic audiometric test battery as a clinical test to measure speech recognition ability in noise.
During the development and validation phase of this study the sample size consisted of 40 normal-hearing subjects with thresholds ≤15 dB across the frequency spectrum (250 – 8000 Hertz [Hz]) and 186 subjects with normal-hearing in both ears, or normal-hearing in the better ear. Single digits (0 – 9) were recorded and spoken by a N English female speaker. Level corrections were applied to create a set of homogeneous digits with steep speech recognition functions. A smartphone application (app) was created to utilize 120 digit-triplets in noise as test material. An adaptive test procedure determined the speech reception threshold (SRT). Experiments were performed to determine headphones effects on the SRT and to establish normative data. The results showed steep speech recognition functions with a slope of 20%/dB for digit-triplets presented in noise using the smartphone app. The results of five headphone types indicate that the smartphone-based hearing test is reliable and can be conducted using standard Android smartphone headphones or clinical headphones.
A prospective cross-sectional cohort study of N and NN English adults with and without sensorineural hearing loss compared pure-tone air conduction thresholds to the SRT recorded with the smartphone digits-in-noise hearing test. A rating scale was used for NN English listeners’ self-reported competence in speaking English. This study consisted of 454 adult listeners (164 male, 290 female; range 16 – 90 years), of which 337 listeners had a best ear 4 frequency pure-tone average (4FPTA; 0.5, 1, 2 and 4 kHz) of ≤25 dB hearing level (HL). A linear regression model identified three predictors of the digits-in-noise SRT namely 4FPTA, age and self-reported English speaking competence. The NN group with poor self-reported English speaking competence (≤5/10) performed significantly (p<0.01) poorer than the N & NN (≥6/10) group on the digits-in-noise test. Screening characteristics of the test improved with separate cut-off values depending on self-reported English speaking competence for the N & NN (≥6/10) group and NN (≤5/10) group. Logistic regression models, that include age in the analysis, showed a further improvement in sensitivity and specificity for both groups (area under the receiver operator characteristic curve [AUROC] .962 and .903 respectively).
A descriptive study evaluated 109 adult subjects (43 male, 66 female) with and without sensorineural hearing loss by comparing pure-tone air conduction thresholds, speech recognition monaural performance score intensity (SRS dB) and the digits-in-noise SRT. An additional nine adult hearing aid users (4 male, 5 female) was utilized in a subset to determine aided and unaided digits-in-noise SRTs. The digits-in-noise SRT was strongly associated with the best ear 4FPTA (r=0.81) and maximum SRS dB (r=0.72). The digits-in-noise test had high sensitivity and specificity to identify abnormal pure-tone (0.88 and 0.88 respectively) and SRS dB (0.76 and 0.88 respectively) results. There was a mean signal-to-noise ratio (SNR) improvement in the aided condition that demonstrated an overall benefit of 0.84 dB SNR. A significant individual variability between subjects in the aided condition (-3.2 to -9.4 dB SNR) and unaided condition (-2 to -9.4 dB SNR) was indicated.
This study demonstrated that a smartphone app provides the opportunity to use the English digits-in-noise hearing test as a national test for South Africans. The smartphone app can accommodate NN listeners by adjusting reference scores based on a self-reported English speaking competence. The inclusion of age when determining the screening test result increases the accuracy of the screening test in normal-hearing listeners. Providing these adjustments can ensure adequate test performance across N English and NN English listeners. Furthermore, the digits-in-noise SRT is strongly associated with the best ear 4FPTA and maximum SRS dB and could therefore provide complementary information on speech recognition impairment in noise in a clinical audiometric setting. The digits-in-noise SRT can also demonstrate benefit for hearing aid fittings. The test is quick to administer and provides information on the SNR loss. The digits-in-noise SRT could therefore serve as a valuable tool in counselling and management of expectations for persons with hearing loss who receives amplification.Thesis (PhD)--University of Pretoria, 2017.
National Research Foundation (NRF)
Speech-Language Pathology and Audiology
PhD
Unrestricted
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Laak, Jan J. F. ter. "Assessment of Development." Pontificia Universidad Católica del Perú, 2013. http://repositorio.pucp.edu.pe/index/handle/123456789/101415.
Full textAbstract:
It is argued that developmental psychology is the "third discipline of scientific psychology" , emphasizing the formal aspect of behavioral continuity/change. Constructs elaborating this aspect are semantical and not empty mathematical models or fuzzy common sense concepts. Assessment is comprehensively describcd as a matrix of four components (test theory, constructs, tests, diagnostica! proces) by three levels (common sense, scientific constructs, mathematical models). Developmental psychology and assessment are confronted to conquer and extend the meaning of continuity/change, as in "convergent" and "discriminant" construct validation. Test theory, tests and the diagnostica! proces respective! y offer models, instruments and a program for assessing behavior.Se sostiene que la psicología del desarrollo es la "tercera disciplina de la psicología científica", enfatizándose el aspecto formal de la continuidad/cambio conductual. Los constructos que elaboran este aspecto son semánticos y no modelos matemáticos vacíos o borrosos conceptos de sentido común. Se describe comprensivamente la evaluación como una matriz de cuatro componentes (teoría de los tests, constructos, tests, proceso diagnóstico) por tres niveles (sentido común, constructos científicos, modelos matemáticos). Se confrontan la psicología del desarrollo y la evaluación con la finalidad de captar y ampliar el significado de continuidad/cambio, como en la validación de constructos "convergentes" y "discriminantes". La teoría de los tests, los tests y el proceso diagnóstico ofrecen, respectivamente, modelos, instrumentos y un programa para evaluar la conducta.
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Marcano, Nashieli. "La materialidad del texto en los cuentos de Jorge Luis Borges." Connect to this title online, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1155823829.
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Bouhaidar, Claudia. "Text Messaging as Adjunct to Community Based Weight Management Program." VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/444.
Full textAbstract:
Obesity ascending rates are still a public health priority. The primary aim of the study was to evaluate the effect of tailored text messages on body weight change in overweight and obese adults in a community based weight management program. A secondary aim was to detect behavioral changes in the same population. The study design was quasi-experimental with pre and posttest analysis, conducted over 12 weeks. A total of 28 participants were included in the analysis. Body weight, eating behaviors, exercise and nutrition self-efficacy, attitude toward mobile technology, social support and physical activity were assessed at baseline and at 12 weeks. Text messages were sent biweekly to the intervention but not to the control group. At 12 weeks, the intervention group had lost significant weight as compared to the control group. There was a trend toward an improvement in eating behaviors, exercise and nutrition self-efficacy in the intervention group, with no significant difference between groups. A total of 79% of participants stated that text messages helped in adopting healthy behaviors. Tailored text messages appear to enhance weight loss in a weight management program at a community setting. Large scale and long term intervention studies are needed to confirm these findings.
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Pinto, Atoccza Tereza. "Análisis de los resultados del test estresante en gestantes con y sin preeclampsia atendidas en el Instituto Nacional Materno Perinatal durante el primer semestre 2014." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2016. https://hdl.handle.net/20.500.12672/4903.
Full textAbstract:
Analiza los resultados del test estresante en gestantes con y sin preeclampsia atendidas en el Instituto Nacional Materno Perinatal durante el primer semestre del año 2014. Es un estudio analítico de preeclampticas y controles, retrospectivo y de corte transversal, que tiene como muestra a 190 gestantes con resultados cardiotocográficos del test estresante divididas en dos grupos: pacientes con diagnóstico de preeclampsia (n=95) y pacientes sin preeclampsia (n=95). Para el análisis descriptivo o univariado de las variables cuantitativas se estima medias y desviación estándar y para las variables cualitativas se estimaron frecuencias y porcentajes. Para el análisis inferencial, se utiliza la prueba Chi-cuadrado, la cual se considera significativa cuando tenía un valor p<0.05. El 86% tiene diagnóstico de preeclampsia leve y el 14% de preeclampsia severa. Los hallazgos cardiotocográficos del test estresante en las gestantes con preeclampsia son: línea de base 110-160 lpm (98.9%), variabilidad mayor o igual a 1 (90.5%), aceleraciones presentes (85.3%), desaceleraciones variables (14.7%), desaceleraciones mayor o igual a 50% (13.7%) y contracciones uterinas menor a 5 (98.9%). En las gestantes sin preeclampsia, los hallazgos cardiotocográficos del test estresante son: línea de base 110-160 lpm (100%), variabilidad mayor o igual a 1 (97.9%), aceleraciones presentes (85.3%), desaceleraciones variables (8.4%), desaceleraciones mayor o igual a 50% (8.4%) y contracciones uterinas menor a 5 (100%). La ausencia de variabilidad estuvo relacionada a la presencia de preeclampsia (p=0.030). Además existe relación entre la conclusión dudosa e insatisfactoria y la presencia de preeclampsia (p=0.033). Se obtiene que la variabilidad y las conclusiones del test estresante en gestantes fueron diferentes para el grupo de gestantes con y sin preeclampsia; ya que la variabilidad ausente (p=0.030) y las conclusiones dudosas e insatisfactorias del test estresante (p=0.033) se relacionan significativamente con el diagnóstico de gestantes con preeclampsia.Tesis
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Pinto, Avendaño David Eduardo. "On Clustering and Evaluation of Narrow Domain Short-Test Corpora." Doctoral thesis, Universitat Politècnica de València, 2008. http://hdl.handle.net/10251/2641.
Full textAbstract:
En este trabajo de tesis doctoral se investiga el problema del agrupamiento de conjuntos especiales de documentos llamados textos cortos de dominios restringidos.
Para llevar a cabo esta tarea, se han analizados diversos corpora y métodos de agrupamiento. Mas aún, se han introducido algunas medidas de evaluación de corpus, técnicas de selección de términos y medidas para la validez de agrupamiento con la finalidad de estudiar los siguientes problemas:
-Determinar la relativa dificultad de un corpus para ser agrupado y estudiar algunas de sus características como longitud de los textos, amplitud del dominio, estilometría, desequilibrio de clases y estructura.
-Contribuir en el estado del arte sobre el agrupamiento de corpora compuesto de textos cortos de dominios restringidos
El trabajo de investigación que se ha llevado a cabo se encuentra parcialmente enfocado en el "agrupamiento de textos cortos". Este tema se considera relevante dado el modo actual y futuro en que las personas tienden a usar un "lenguaje reducido" constituidos por textos cortos (por ejemplo, blogs, snippets, noticias y generación de mensajes de textos como el correo electrónico y el chat).
Adicionalmente, se estudia la amplitud del dominio de corpora. En este sentido, un corpus puede ser considerado como restringido o amplio si el grado de traslape de vocabulario es alto o bajo, respectivamente. En la tarea de categorización, es bastante complejo lidiar con corpora de dominio restringido tales como artículos científicos, reportes técnicos, patentes, etc.
El objetivo principal de este trabajo consiste en estudiar las posibles estrategias para tratar con los siguientes dos problemas:
a) las bajas frecuencias de los términos del vocabulario en textos cortos, y
b) el alto traslape de vocabulario asociado a dominios restringidos.
Si bien, cada uno de los problemas anteriores es un reto suficientemente alto, cuando se trata con textos cortos de dominios restringidos, la complejidad del problema se incrPinto Avendaño, DE. (2008). On Clustering and Evaluation of Narrow Domain Short-Test Corpora [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/2641
Palancia
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García, Siso Andrés. "Una contribución al estudio de los estados límites." Doctoral thesis, Universitat de Barcelona, 1991. http://hdl.handle.net/10803/283188.
Full textAbstract:
La Tesis que se defiende en este trabajo de investigación está constituida por tres grupos de Hipótesis que expresaremos individualmente al mostrar en resumen las conclusiones finales.
En el primer grupo se propone dilucidar el Concepto y Ámbito Nosológico de los diferentes Signos con que se denominan los Trastornos psiquiátricos que, en la actualidad, llamamos:"Borderline", “Etats-límite”, “Fronterizo".
El análisis de los Signos comienza por su recopilación a lo largo de la historia de la Psiquiatría, a la vez que se los somete a un desdoblamiento, dando prioridad, en un momento, al valor Significante, para luego profundizar sobre los Significados conceptuales. El análisis del Significante descubre la necesidad de confrontar el término "Borderline",”Limite ll” o “Fronterizo”, a otros como "Esquizo" y "Psicosis", o "Carácter" y "Personalidad”. Todo ello nos obliga a reflexionar sobre las construcciones nosológicas. El análisis del Significado estudia el campo semántico que ha quedado delimitado por el análisis de las oposiciones distintivas del Significante, a través del estudio de algunos cuadros clínicos psiquiátricos, paradigmáticos de esos campos. Así distinguimos: Psicosis y Borderline (La Heboidofrenia).
Esta doble reflexión sobre el Significado nos conduce a la búsqueda y encuentro de articulaciones conceptuales entre la noción de Carácter y sus parentescos ineludibles con: El Signo, el “Self”, los mecanismos y sistemas de Defensa y el Narcisismo. Con todo ello, análisis de los Significantes y de los Significados, se propone un término nuevo que reúna como Signo las conclusiones obtenidas de los análisis realizados. Este término es el de Caracterosis, que entonces se justifica de manera resumida y puntual. Al mismo tiempo y a continuación, se da cuenta de los Criterios Diagnósticos, que han de servir para la selección de los pacientes que componen la muestra estudiada de Adolescentes-Limite y de los Subgrupos Clínicos, así como se establece el Significado del término “Caracterosis”,.tanto en un primer momento, Descriptivo-dinámico, como en otro segundo, Dinámico-estructural. Se dedica un apartado, puesto que la muestra se constituye con pacientes jóvenes, para justificar el diagnóstico y las ventajas que proporcionan las semejanzas existentes entre la organización pulsional y defensiva de la Adolescencia normal y la Organización Limite, procurando que así, tras el análisis pulsional szondiano, se resalten los mecanismos propios de la Organización Limite de la Personalidad.
Para realizar el estudio pulsional de la Organización Limite de la Personalidad, en el grupo de Adolescentes Limite y en el grupo control de Adolescentes supuestamente normales, me serví del Test de Szondi, instrumento que es presentado, indicando su composición, instrucciones de manejo, interpretación de la información que proporciona, así como los desarrollos actuales de los trabajos szondianos.
Tenemos, pues, los criterios diagnósticos, el instrumento testológico y el lugar, el Centro Jean Sarrailh, donde se ha extraído la muestra de pacientes. El Material, entonces, vendrá compuesto, para cada individuo, por un resumen de su historia clínica, sometida a los criterios diagnósticos descriptivo-dinámicos de la Organización Limite de la personalidad, y los resultados obtenidos por el Test de Szondi. El Método, además del peculiar análisis bibliográfico sobre el concepto "Borderline", en este segundo grupo de hipótesis, que detallaremos al concluir, consiste en el Análisis Estadistico mediante dos grandes tipos de técnicas: Análisis Bivariados con pruebas paramétricas (T de Student) y pruebas no paramétricas (U de Horn Whitney). Análisis multivariados (Análisis Discriminante), que se aplican a las comparaciones de los distintos grupos establecidos, que configuran los Resultados de: Perfil Szondiano General y Principal de los Adolescentes Limite, Perfiles Szondianos Diferenciales entre: Adolescente Limite / Adolescente Normal; Adolescentes Limite: Varones / Hembras, Adolescentes Limite: "Neuróticos" / "Psicóticos"; Adolescentes Límite: “actuadores” / "neurótico"/"psicóttco". Todos estos resultados y otros no especificados son interpretados pormenorizadamente, a la vez que realizamos el Diagnóstico Diferencial Szondiano con otros cuadros clínicos de la Psicopatología, tanto por el método clásico cualitativo, como por el Análisis Discriminante Cuantitativo, que proponemos, dentro del tercer grupo de hipótesis, como un sistema nuevo que se abre en las investigaciones szondienas, a modo de Diagnóstico Diferencial Clínico Szondieno Informatizado.
En el capítulo de Conclusiones Generales Desarrolladas, se describe la articulación de los hallazgos Szondianos con las Teorias Psicoanalíticas a propósito de la Organización Limite, destacándose la aportación Szondiana a la teorética y sistemática de la Organización Limite de la Personalidad.
Las Conclusiones Finales las exponemos a modo de confirmación de las Hipótesis propuestas:
1. "Establecer un término que nombre a los múltiples trastornos que se aglutinan bajo la denominación de Estado-Límite, que sirva al nivel clínico-descriptivo y al nivel dinámico-estructural, reportándole entidad propia, parece imponerse". El término Caracterosis es el que se propone y justifica.
2. "Se puede definir y delimitar un Perfil Szondiano de la Organización Limite en la Adolescencia".
3. "El mecanismo de Clivaje Pulsional, estructura a la Organización Limite de la Personalidad en la Adolescencia".
4. "El Perfil Szondiano característico del Estado-Limite, que propone J. Mélon, lo consideramos correcto". Así fue validado,
5. "Existe un Perfil Szondiano Diferencial entre adolescentes limite y Adolescentes normales".
6. "La Organización Limite en la Adolescencia se caracterizó por presentar unos resultados Szondianos que se encuentran entre la latencia y la adolescencia".
7. "Existe un Perfil Szondiano Diferencial de la Organización Limite con las Neurosis y con las Psicosis".
8. "Existan puntos comunes que aproximan a la Organización Límite y a la Perversión".
9. "El Test de Szondi diferencia y define a los Adolescentes Límite próximos a la neurosis de los Adolescentes Límite próximas a la psicosis".
10. "El Test de Szondi diferencia y define tres subtipos clínicos de Adolescentes Límite: "actuadores", "neuróticos" y “psicóticos”
11. ."La diferencia sexual anatómica se manifiesta en el Perfil Szondiano Diferencial de los Adolescentes Límite". Aquí corroboramos la hipótesis freudiana de la asimetría del Complejo de Edipo.
12. "El Test de Szondi muestra su validez y fiabilidad al someterse al Análisis Estadístico Complejo de sus resultados". Se abre, con grandes posibilidades, la realización da Diagnóstico Diferencial Informatizado mediante el Test de Szondi.
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Dybäck, Matilda, and Johanna Wallgren. "Pupil dilation as an indicator for auditory signal detection : Towards an objective hearing test based on eye tracking." Thesis, KTH, Skolan för teknik och hälsa (STH), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192703.
Full textAbstract:
An early detection of hearing loss in children is important for the child's speech and language development. For children between 3-6 months, a reliable method to measure hearing and determine hearing thresholds is missing. A hearing test based on the pupillary response to auditory signal detection as measured by eye tracking is based on an automatic physiological response. This hearing test could be used instead of the objective hearing tests used today. The presence of pupillary response has been shown in response to speech, but it is unstudied in response to sinus tones. The objective of this thesis was to study whether there is a consistent pupillary response to different sinus tone frequencies commonly used in hearing tests and if yes, to determine reliably the time window of this response. Four different tests were done. The adult pupillary response in regard to sinus tone stimuli with four frequency levels (500 Hz, 1000 Hz, 2000 Hz and 4000 Hz), and four loudness levels (silence, 30 dB, 50 dB and 70 dB) was tested (N=20, 15 females, 5 males). Different brightness levels and distractions on the eye tracking screen were investigated in three substudies (N=5, 4 females, 1 male). Differences between silence and loudness levels within frequency levels were tested for statistical significance. A pupillary response in regard to sinus tones occurred consistently between 300 ms and 2000 ms with individual variation, i.e. earlier than for speech sounds. Differences between silence and loudness levels were only statistically significant for 4000 Hz. No statistical difference was shown between different brightness levels or if there were distractions present on the eye tracker screen. The conclusion is that pupillary response to pure sinus tones in adults is a possible measure of hearing threshold for at least 4000 Hz. Larger studies are needed to confirm this, and also to more thoroughly investigate the other frequencies.En tidig upptäckt av hörselnedsättning hos barn är viktig för barnets tal- och språkutveckling. För barn mellan 3-6 månader saknas det en tillförlitlig metod för att mäta hörsel och bestämma hörtrösklar. Ett hörseltest baserad på pupillreaktion på ljud som mäts med en eye tracker bygger på en automatisk fysiologisk reaktion och skulle kunna användas istället för de objektiva test som används idag. Hitintills har pupillreaktion på tal påvisats, men det saknas studier som studerat eventuella reaktioner på sinustoner. Syftet med denna uppsats var att undersöka om det finns en enhetlig pupillreaktion på de olika frekvenserna av sinustoner som vanligen används i hörseltest. Vidare var studiens syfte att fastställa ett tillförlitligt tidsfönster för pupillreaktion. Fyra olika typer av tester utfördes. Pupillreaktionen mot sinustoner med fyra olika frekvensnivåer (500 Hz, 1000 Hz, 2000 Hz och 4000 Hz), och fyra olika ljudnivåer (tystnad, 30 dB, 50 dB och 70 dB) undersöktes i ett test på vuxna deltagare (N=20, 15 kvinnor, 5 män). Olika ljusnivåer och distraktioner på eye tracker-skärmen undersöktes i tre test (N=5, 4 kvinnor, 1 man). Skillnaderna mellan ljudnivåer och frekvensnivåer testades med statistiska tester. Resultaten visade att pupillreaktion på sinustoner inträffade konsekvent mellan 300 ms och 2000 ms med individuella variationer. Denna reaktionstid inträffar tidigare än för taljud. En statistisk signifikant skillnad mellan tystnad och olika ljudnivåer kunde endast ses för frekvensnivån 4000 Hz. Ingen statistisk skillnad uppmättes mellan olika ljudnivåer eller om det fanns distraktioner på eye tracker-skärmen. De i studien framkomna resultaten tyder på att pupillreaktioner mot rena sinustoner hos vuxna är en möjlig metod för att identifiera hörseltrösklar för åtminstone 4000 Hz. Större studier behöver göras för att fastställa detta och en noggrannare undersökning behöver genomföras för de andra frekvenserna.
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Huang, Stephanie M. "Nostos: On Recollecting Loss and the Physical Manifestation of Loss." Scholarship @ Claremont, 2016. http://scholarship.claremont.edu/scripps_theses/760.
Full textAbstract:
This paper examines nostalgia in photo-poetry book Nostos, and nostalgia’s existence as a theoretical global condition arising from displacement, looking at nostalgia specifically not as a yearning for home, but a yearning for a lost sense of feeling at home. It traces the lineage of image-text hybrid art practices and examines the significance of conveying meaning through both synergistically. It studies the psychoanalytic process of transforming loss into object, or absence into presence, ultimately using the object as a lens to view oneself and the way in which nostalgia manifests itself.
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Trapp, Ethlyn Gail Medical Sciences Faculty of Medicine UNSW. "Effect of high intensity exercise on fat loss in young overweight women." Awarded by:University of New South Wales. School of Medical Sciences, 2006. http://handle.unsw.edu.au/1959.4/25182.
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This thesis investigated the effect of high intensity, intermittent exercise (HIIE) on fat loss in young, sedentary women. It attempted also to identify possible mechanisms underpinning exercise-induced changes in adiposity. Study 1 investigated some of the metabolic and hormonal responses to two variations of HIIE. Sixteen female subjects were tested. The first session involved a cycle ergometer VO2peak test. The next two sessions were completed in random order. After baseline measures the women did 20 min of HIIE. There was a short bout exercise of 8 s work, followed by 12 s relative rest and a long bout exercise of 24 s work followed by 36 s relative rest. Seven subjects had excess postexercise oxygen consumption (EPOC) and resting metabolic rate determined. Both exercise modalities made significant demands on the participants??? oxygen delivery systems. RER diminished over the 20 min of exercise and plasma glycerol concentrations increased. Lactate concentrations rose. Catecholamine concentrations were elevated postexercise. There was an elevated EPOC associated with above baseline fat utilisation. Study 2, a 15-week training study, was a randomised controlled trial comparing the effects of short bout HIIE and steady state (SS) exercise on fat loss. Forty-five women were randomly assigned to one of three groups: HIIE, SS, or control. Preliminary and posttraining testing included a DEXA scan and a VO2peak test including blood collection. All participants completed 3-d diet diaries and maintained their current diet for the course of the study. Participants exercised three times a week for the next 15 weeks under supervision. The HIIE group did 20 min of HIIE (8 s work:12 s rest) at a workload determined from the VO2peak test. The SS group cycled at 60%VO2peak , building to a maximum of 40 min exercise. Both exercise groups increased VO2peak . The HIIE group had a significant loss of total body mass (TBM) and fat mass (FM) when compared to the other groups. There was no change in dietary intake. There have been a number of studies examining the acute effects of HIIE but, to our knowledge, this is the first study examining the chronic effects of this particular exercise protocol.
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Nguyen, Gia Huynh Truong. "Evaluating soil erodibility parameters with mini-JET under various soil moisture conditions." Kansas State University, 2016. http://hdl.handle.net/2097/34526.
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Master of ScienceDepartment of Biological & Agricultural Engineering
Aleksey Y. Sheshukov
Soil erosion is one of the main reasons for agricultural land degradation in the world. Losses of land because of high soil erosion rates and rapidly expanding population result in significant reduction of cultivated land area per capita, and shortage of food on the global scale. Soil erosion can be a major source of sediment in the aquatic systems leading to reduction of organism population and poor water quality. Many factors affect soil erodibility, such as, soil properties, rainfall, topographic features, land use, and management practices, among others. The impacts of soil moisture content, however, are not well understood and. therefore, the primary goal of this study was to quantify two soil erodibility parameters, the erodibility coefficient and critical shear stress, under different soil moisture conditions using the jet erosion test (JET). The JET test uses the apparatus (called mini-JET) that creates an impinging jet of water into the soil and records the resulting scour depth over time. The scour depth time series are then fitted into a non-linear soil erosion equation, yielding the sought values of erodibility parameters. For this study, more than 40 soil samples were collected from several sites in Kansas, processed, and prepared to conduct JET tests in the lab setting. The effects of tillage and soil moisture content were of interest to this study. The results showed varied effects of soil type and sample soil moisture condition on the scour depth development and parameters sensitivity. The critical shear stress decreased and the erodibility coefficient increased with the increase of initial moisture content for clay loam soil, while critical shear stress did not change for sandy loam soil. The study also revealed higher erosive properties of soil collected from the tilled field compared to the no-till field.
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Hsieh, Ming-Chuan. "An investigation of a Bayesian decision-theoretic procedure in the context of mastery tests." Diss., University of Iowa, 2007. http://ir.uiowa.edu/etd/127.
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Söderman, Michael. "Loss-less on-chip test response compression for diagnosis and debug in volume production of system-on-chip." Thesis, Linköping University, Department of Computer and Information Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11948.
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The technical evolution during the past decade have escalated the use of electronic devices, which are more common today than ever before. The market is still growing rapidly and will continue to do so. The reason for this is the increased demand for devices with integrated circuits. In addition to the increased volume of production, the chips are also becoming more complex which is also reflected in the requirements of the chip design process.
An advanced chip that combines several different hardware modules (cores) to form a complete system is called a System-on-Chip (SoC). It is of great importance that these chips work according to expectation, although it can be difficult to guarantee. The purpose of SoC testing is to verify correct behaviour as well as for diagnosis and debug.
Complex systems lead to more and bigger tests which lead to increased test data volume and test time. This results in a higher test cost and many methods are proposed to remedy this situation.
This report proposes a method that minimises fail result data with a real-time compression component embedded on the chip. The compressed fail results can be saved on-chip and retrieved when needed instead of during the test.
Furthermore this method will facilitate debug and diagnosis of SoCs. A mask buffer is used to give the opportunity of choosing exactly which cycles, pins or bits that are relevant. All other result bits are masked and ignored.
The results are satisfying, the data is compressed to a much smaller size which is easier to store on-chip. The method is simple, fast and loss-less.
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Kurz, Susanne, Dominik Schoebi, Daniela Dremmel, Wieland Kiess, Simone Munsch, and Anja Hilbert. "Satiety regulation in children with loss of control eating and attention-deficit/hyperactivity disorder: a test meal study." Elsevier, 2017. https://ul.qucosa.de/id/qucosa%3A33732.
Full textAbstract:
Children with loss of control (LOC) eating and attention-deficit/hyperactivity disorder (ADHD) are at risk for excessive weight gain. However, it is unclear whether or not these children show disturbances in hunger and satiety regulation. The goal was to examine the food intake and sense of LOC over eating as well as LOC eating-related characteristics during test meal in children with LOC eating and ADHD. Children aged 8-13 y with LOC eating (n = 33), ADHD (n = 32), and matched healthy controls (n = 33), consumed a test meal consisting of their chosen lunch food, with the instruction to eat until feeling full. Sense of LOC over eating, desire to eat, feelings of hunger, and liking of food were repeatedly assessed during test meal. Children with LOC eating and ADHD did not show a higher food intake at maximum satiety compared to control children. Sense of LOC over eating was significantly higher in children with LOC eating compared to children with ADHD and matched controls. Secondary analyses revealed that children with LOC eating ate marginally faster than control children. Both children with LOC eating and ADHD reported greater desire to eat, feelings of hunger, and liking of food during test meal than control children. Even though the results did not reveal statistical evidence to support the assumption of a disturbed food intake in children with LOC eating and ADHD, LOC eating related characteristics were significantly higher in these children compared to the control children. Sense of LOC over eating was confirmed as a specific characteristic of LOC eating. The examination of behavioral indicators of hunger and satiety dysregulation should be complemented with physiological indicators in future research.