Dissertations / Theses: 'Shift time'

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Kadir, Mohammad Ismat. "Co-located and distributed multicarrier space-time shift keying for wideband channels." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/363263/.

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Multicarrier (MC) transmissions are proposed for the space time shift keying (STSK) concept. Specifically, OFDM, MC CDMA and OFDMA/SC-FDMA-aided STSK are proposed for transmissions over dispersive wireless channels. Additionally, a successive relaying (SR) aided cooperative MC STSK scheme is conceived for gleaning cooperative space time diversity and for mitigating the half-duplex throughput loss of conventional relaying. Furthermore, a multiple-symbol differential sphere decoding (MSDSD) aided multicarrier STSK arrangement is proposed to dispense with channel estimation (CE). We design a novel modality of realizing STSK amalgamated with OFDM for facilitating high-rate data-transmissions through a number of low-rate parallel subchannels, thus overcoming the dispersion induced by broadband channels. A MC-CDMA aided STSK system is also proposed for mitigating the channel-induced dispersion, while providing additional frequency-domain (FD) diversity and supporting multiuser transmissions. As a further advance, we design OFDMA and SC FDMA-aided STSK systems, which are capable of communicating in dispersive multiuser scenarios, whilst maintaining a low peak-to-average power ratio (PAPR) in the SC-FDMA-aided STSK uplink. Additionally, complexity reduction techniques are proposed for OFDMA/SC-FDMA-aided STSK. We also conceive the concept of SR aided cooperative multicarrier STSK for frequency-selective channels for mitigating the typical 50% throughput loss of conventional half-duplex relaying in the context of MC-CDMA and for reducing the SR-induced interferences. We additionally propose a differentially encoded cooperative MC-CDMA STSK scheme for facilitating communications over hostile dispersive channels without requiring CE. Finally, the noncoherent multicarrier STSK arrangement is further developed by using MSDSD. The conventional differential detection suffers from a typical 3-dB performance loss, which is further aggravated in the presence of high Doppler frequencies. Hence, for the sake of mitigating this performance loss in the face of high Doppler scenarios, while maintaining a modest decoding complexity, both a hard-decision-based as well as an iterative soft-decision multiple-symbol differential sphere decoding aided multicarrier STSK arrangement is developed.

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Riggs, Elizabeth E. "Assumptions of Attentional Shift: Measurement of Physical Attention During Audio Narratives." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1590677141040261.

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Johansson, Björn. "Multidimensional signal recognition, invariant to affine transformation and time-shift, using canonical correlation." Thesis, Linköping University, Linköping University, Computer Vision, 1997. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54355.

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Chapter 2 describes the concept of canonical correlation. This you have to know about in order to understand the continuing discussion.Chapter 3 introduce you to the problem that was to be solved.Chapter 4, 5 and 6 discusses three different suggestions how to approach the problem. Each chapter begins with a section of experiments as a motivation of the approach. Then follows some theory and mathematical manipulations to structure the thoughts. The last sections contains discussions and suggestions concerning the approach.Finally chapter 7 contains a summary and a comparismental discussion of the approaches.

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James, Francine O. "Circadian adaptation to full-time night shift work with bright light intervention regimen." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31243.

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The primary consequence of night shift work is a misalignment of the endogenous circadian pacemaker with the inverted sleep-wake cycle. This study evaluated the efficacy of a judicious schedule of light exposure on circadian adaptation to night work. Fifteen night shift workers (mean age +/-S.E.M.: 41.8 +/- 1.8 years) were studied for 3 weeks in their work environments under one of two experimental conditions. Treatment group participants underwent an intervention including bright light in the workplace, while control group participants were studied in their habitual light environments. The efficacy of the intervention was evaluated in the laboratory via constant routines. Following the intervention, treatment group subjects displayed a mean phase delay of (+/-S.E.M.) -9.32 +/- 1.06 hours and full entrainment to the night-oriented schedule while control group subjects displayed a phase delay -4.09 +/- 1.94 hours and a partial entrainment (F(1,30) = 11.33, p = 0.002). The results of this study suggest a means of alleviating the difficulties associated with night shift work with control of the overall pattern of light exposure.

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Forren, Helmut R. "Multiprocessor design methodology for real-time DSP systems represented by shift-invariant flow graphs." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/15778.

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Ozzaman, Gokhan. "Real Time Color Based Object Tracking." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606102/index.pdf.

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A method for real time tracking of non-rigid arbitrary objects is proposed in this study. The approach builds on and extends work on multidimensional color histogram based target representation, which is enhanced by spatial masking with a monotonically decreasing kernel profile prior to back-projection. The masking suppresses the influence of the background pixels and induces a spatially smooth target model representation suitable for gradient-based optimization. The main idea behind this approach is that an increase in the number of quantized feature spaces used to generate the target probability distribuition function during histogram back-projection can lead to improved target localization. Target localization is performed using the recursive Mean shift procedure, which climbs the underlying density graidients of the discrete data to find the mode (peak) of the distribution. Finally, the real time test cases, such as occlusion, target scale and orientation changes, varying illumination and background clutter, are demonstrated.

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Dang, Xiaoyu. "Space-Time Shaped Offset QPSK." International Foundation for Telemetering, 2008. http://hdl.handle.net/10150/606190.

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ITC/USA 2008 Conference Proceedings / The Forty-Fourth Annual International Telemetering Conference and Technical Exhibition / October 27-30, 2008 / Town and Country Resort & Convention Center, San Diego, California This paper describes the use of orthogonal space-time block codes to overcome the performance and complexity difficulties associated with the use of Shaped Offset QPSK (SOQPSK) modulation, a ternary continuous phase modulation (CPM), in multiple-input multiple-output telemetry systems. The orthogonal space-time block code is applied to SOQPSK waveforms in the same way it would be applied to symbols. The procedure allows the receiver to orthogonalize the link. The main benefits of this orthogonalization are the easy realization of the transmit diversity for the offset-featured SQOSPK, and the removal of the noise correlation at the input to the space-time decoder and the elimination of I/Q interference when space time orthogonalization is applied to the symbol level.

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Lennartsson, Richard. "Automatic diagnostic system for I-shift transmission using vibration analysis." Thesis, Linköping University, Automatic Control, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57732.

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This master’s thesis work was performed at Volvo Powertrain in Köping, Sweden, which manufactures gearboxes and integrated transmission systems for heavy vehicles. The thesis is a continuation of a previous master’s thesis performed at the Köping factory in 2009. After manufacturing and assembly, each gearbox is manually validated to ensure the gearbox quality and functionality. When validating the gearbox gears, the operator shifts the gearbox in a predefined manner and listens for irregularities. If an error sound is heard the operator must then locate the source of error. With numerous of cog wheels rotating at the same time this task requires extensive knowledge and experience of the operator. The main objective is to develop an automatic diagnostic system for detection of cog errors and assist the operator in the process of locating the faulty component.The work consists of two parts. In the first part the automatic diagnostic system is developed and a database of gearbox recordings is stored. The amounts of logged non-faulty gearboxes are significantly much larger (50) than the logged faulty gearboxes (1). Therefore, when determining thresholds needed for the diagnosis, the data obtained from the non-faulty gearboxes are used. Two statistical methods are presented to extract the thresholds. The first method uses an extremevalue distribution and the other method a Gaussian distribution. When validated, both methods did successfully detect on cog faults. In the second part an investigation is made of how shaft imbalance can be detected and implemented in the developed system.Volvo Powertrain continually follows-up all faults found at the validation station to ensure the quality of their work and eliminate the sources of error. During system testing one logged gearbox was found faulty. The automatic diagnostic system did successfully detect and locate the faulty component which later also was confirmed when the gearbox was dismounted. With only one detected error it is difficult to conclude the system performance and further testing is required. However, during the testing no false detections were made.

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Mičiūnaitė, Viktorija. "Shift of time and space in the modernist narrative of Virginia Woolf's "To the Lighthouse"." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110627_125456-66016.

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The purpose of the present paper was to explore a new approach to the notions of time, temporality, and space within modernist literature, the distinction of the natural, conceptual, and fictional time as well as the alterations of time due to the deictic centre. The investigation of the above-mentioned issues was based on the modernist novel To the Lighthouse by Virginia Woolf. The main method chosen for the study was content analysis. The research of time and space shift in the given novel is grounded on several overlapping critical theories: Practical Criticism, which comprises Formalist and New Critical ideas, Psychoanalysis, and the Theory of Narratology. The research demonstrated that Virginia Woolf attempted to structure her novel outside the conventional clock of time treatment because it was too inflexible to be suitable for a writer who believed that time represented in fiction should reflect the way time influences and is influenced by human lives. The given novel is a conspicuous example of an innovative concept of time and space presented by the author who gave preference to the abstract inner time rather than to that of the outer world and who come closer than any other writer to expressing time as it actually is experienced in human mind. The present study extended the existing knowledge of the psychological background, the transitivity and variability of time issues, and of the specific features the modern narrative in the novel. Further studies of the... [to full text] Šio darbo tikslas buvo ištirti visiškai naują požiūrį į laiko, laikinumo ir erdvės sampratą modernistinėje literatūroje bei analizuoti gamtinio, konceptualiojo, ir literatūrinio laiko kaitą dėl deiktinio centro ypatybių. Analizei buvo pasirinktas Virdžinijos Vulf moderinistinis romanas „Į švyturį“, kuriame atsispindi modernistinis požiūris į žmogų ir jį supančią tikrovę. Kurdama savo veikėjų paveikslus, rašytoja įtaigiai atskleidė ir parodė, kad žmogaus gyvenimą pirmiausia lemia ne išorinė aplinka, bet mintyse, pasąmonėje vykstantys virsmai, kutrių fizinę išraišką parodo konkretūs veiksmai ir poelgiai. Modernizmo žmogus parodomas kaip praradęs tradicines pasaulio suvokimo atramas, likęs akistatoje su savo intymiausias patyrimais, išgyvenantis savo būtį kaip izoliuotą, atskirtą nuo viso pasaulio, pasimetusią tarp fantazijos ir realybės. Savo tyrimu siekiau įrodyti, kad Virdžinijos Vulf veikėjai analizuojamame romane save iškelia kaip esminį būties centrą ir didžiausią vertybę, nepavaldžią laiko ir erdvės matmenims, bet tuo pačiu metu susiduria su savo sudėtingu ribotu vidiniu pasauliu – suskilusiu, nuolat kintančiu, klaidinančiu, susidedančiu iš subjektyvių greit kintančių patirties fragmentų. Romane autorė atskleidė ir modernistinio naratyvo ypatumus - jos rašymo stilių galima laiktyi savita kalbine revoliucija, kuri padėjo atskleisti giliausius veikėjų sąmonės klodus pritaikant sąmonės srauto techniką bei vidinius monologus. Šiame kūrinyje nebėra nuoseklaus... [toliau žr. visą tekstą]

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Sugiura, Shinya. "Coherent versus non-coherent space-time shift keying for co-located and distributed MIMO systems." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/165759/.

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In this thesis, we propose the novel Space-Time Coding (STC) concept of Space-Time Shift Keying (STSK) and explore its characteristics in the contexts of both co-located and cooperative Multiple-Input Multiple-Output (MIMO) systems using both coherent and non-coherent detection. Furthermore, we conceive new serially-concatenated turbo-coding assisted STSK arrangements for the sake of approaching the channel capacity limit, which are designed with the aid of EXtrinsic Information Transfer (EXIT) charts. The basic STSK concept is first proposed for the family of co-located MIMO systems employing coherent detection. More specifically, in order to generate space-time codewords, these Coherent STSK (CSTSK) encoding schemes activate one out of Q dispersion matrices. The CSTSK scheme is capable of striking an attractive tradeoff between the achievable diversity gain and the transmission rate, hence having the potential of outperforming other classic MIMO arrangements. Since no inter-channel interference is imposed at the CSTSK receiver, the employment of single-stream-based Maximum Likelihood (ML) detection becomes realistic. Furthermore, for the sake of achieving an infinitesimally low Bit-Error Ratio (BER) at low SNRs, we conceive a three-stage concatenated turbo CSTSK scheme. In order to mitigate the effects of potential Channel State Information (CSI) estimation errors as well as the high pilot overhead, the Differentially-encoded STSK (DSTSK) philosophy is conceived with the aid of the Cayley transform and differential unitary space-time modulation. The DSTSK receiver benefits from low-complexity non-coherent single-streambased ML detection, while retaining the CSTSK scheme’s fundamental benefits. In order to create further flexible STSK architecture, the above-mentioned co-located CSTSK scheme is generalized so that P out of Q dispersion matrices are activated during each space-time block interval. Owing to its highly flexible structure, this generalized STSK scheme subsumes diverse other MIMO arrangements. Finally, the STSK concept is combined with cooperative MIMO techniques, which are capable of attaining the maximum achievable diversity gain by eliminating the undesired performance limitations imposed by uncorrelated fading. More specifically, considering the usual twin-phase cooperative transmission regime constituted by a broadcast phase and by a cooperative phase, the CSTSK and DSTSK schemes developed for co-located MIMO systems are employed during the cooperative transmission phase.

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Kuchi, Jayasurya. "AN EFFICIENT APPROACH TO REDUCE TEST APPLICATION TIME THROUGH LIMITED SHIFT OPERATIONS IN SCAN CHAINS." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2182.

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Scan Chains in DFT has gained more prominence in recent years due to the increase in the complexity of the sequential circuits. As the test time increases along with the number of memory elements in the circuit, new and improved methods came in to prominence. Even though scan chain increases observability and controllability, a big portion of the time is wasted while shifting in and shifting out the test patterns through the scan chain. This thesis focus on reducing the number of clock cycles that are needed to test the circuit. The proposed Algorithm uses modified shift procedures based on 1) Finding hard to detect faults in the circuit. 2) Productive way to generate test patterns for the combinational blocks in between the flip flops. 3) Rearranging test patterns and changing the shift procedures to achieve fault coverage in reduced number of clock cycles. In this model, the selection process is based on calculating the fault value of a fault and total fault value of the vector which is used to find the hard faults and the order in which the vectors are applied. This method reduces the required number of shifts for detecting the faults and thereby reducing the testing time. This thesis concentrates on appropriate utilization of scan chains for testing the sequential circuits. In this context, the proposed method shows promising results in reduction of the number of shifts, thereby reducing the test time. The experimental results are based on the widely cited ISCAS 89 benchmark circuits.

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Karanfil, Özge 1978. "Why clinical practice guidelines shift over time : a dynamic model with application to prostate cancer screening." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107531.

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Thesis: Ph. D., Massachusetts Institute of Technology, Sloan School of Management, 2016. Cataloged from PDF version of thesis. Includes bibliographical references. Essay 1: A Dynamic Model for Understanding Long-Term Trends in Prostate Cancer Screening Cancer remains the second leading cause of death in the U.S. after heart disease. After 35 years of routine cancer screening, we still have only a limited understanding of screening dynamics. There is evidence of over-screening and resulting overtreatment in certain cases, and significant provider variation and fluctuations over time in screening criteria. Here I present empirical data for fluctuations in official screening guidelines and in actual practice for the use of the prostate-specific antigen (PSA) test. I explore how these dynamics are affected by the main guideline-issuing organizations in the U.S. and by clinicians, patient groups, and the media. Essay 2: Our Walk to the End of Cancer? Understanding Long-Term Trends in Medical Screening In this study we develop the first integrated, broad boundary feedback theory and formal model to explain the dynamics of medical screening. The theory includes a decision-theoretic core around harms and benefits including the fundamental tradeoff between sensitivity and specificity; and feedbacks that condition guidelines and actual practice. To provide context we use the case of PSA screening for prostate cancer as a motivating example, but our model is generic and applicable to other contexts. We present a behaviorally realistic, boundedly-rational model of detection and selection for health screening that creates oscillations in policy recommendation thresholds of formal guidelines. This core model, entailing only the evidence generation and translation processes, demonstrates how oscillations are natural to this category of problems due to inherent delays in evidence-based screening. These fluctuations lead to long periods during which screening guidelines are suboptimal. Essay 3: A Dynamic Model for Understanding Long-Term Trends in Prostate Cancer Screening Whereas guidelines for routine screening should be based on medical evidence, evidence often has relatively little impact on practice. This situation has led to ongoing controversy and conflict over appropriate guidelines among scientists, clinicians, and patient advocacy groups. There are significant variations in clinical practice, including evidence of over-screening for some diseases, and under-screening for others. To explain the patterns of over-screening, fluctuations, low adherence to guidelines, and conflict, I develop the first explicit broad boundary feedback theory of the dynamics of medical screening, tested in a formal mathematical model. The model presents an extended case study specific to PSA screening for prostate cancer, including realistic presentations for the fundamental tradeoff between test sensitivity and specificity, the natural progression of the disease, and respective changes in population size and composition. by Özge Karanfil. A dynamic model for understanding long-term trends in prostate cancer screening -- Our walk to the end of cancer?: understanding long-term trends in medical screening -- A dynamic model for understanding long-term trends in prostate cancer screening. S.M. in Management Research

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Dang, Xiaoyu. "An Optimum Detector for Space-Time Trellis Coded Differential MSK." International Foundation for Telemetering, 2007. http://hdl.handle.net/10150/604515.

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ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada The accuracy of channel estimation plays a crucial role in the demodulation of data symbols sent across an unknown wireless medium. In this work a new analytical expression for the channel estimation error of a multiple input multiple output (MIMO) system is obtained when the wireless medium is continuously changing in the temporal domain. Numerical examples are provided to illustrate our findings. Space-time (ST) coding using Continuous Phase Modulation (CPM) has spectral advantages relative to linear modulations. In spite of the spectral benefits, Space-Time Trellis Codes (STTC) using the CPM implementation of Minimum Shift Keying (MSK) scheme has inherent inphase and quadrature interference, when the received complex baseband signal is the input into the matchfilter to remove the shaped sinusoid pulses. In this paper a novel optimum transmitting and detecting structure for STTC-MSK is proposed. Treating the Alamouti scheme as an outer code, each STTC MSK waveform frame is immediately followed by the orthogonal conjugate waveform frame at the transmit side. At the receiver first orthogonal wave forming is applied, then a new time-variant yet simple trellis structure of the STTC-MSK signals is developed. This STTC-MSK detector is absolutely guaranteed to be I/Q interference-free and still keeps a smaller computation load compared with STTC-QPSK. Simulations are made over quasi-static AWGN fading channel. It is shown that our detector for ST-MSK has solved the I/Q interference problem and has around 2.8 dB gain compared with the Alamouti Scheme and 3.8 dB gain for bit error rate at 5 X 10^(-3) in a 2 by 1 Multiple Input Single Output system.

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Basharati, Sarhad. "MIMO and Relay Systems Based on Multi-Amplitude Minimum Shift Keying." Thesis, University of Canterbury. Electrical and Computer Engineering, 2013. http://hdl.handle.net/10092/8491.

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This thesis describes the use of a multi-amplitude minimum shift keying (MAMSK) signal in various types of wireless communication system. A MAMSK signal is a bandwidth efficient modulation scheme obtained by superimposing ℳ minimum shift keying (MSK) signals with unequal amplitudes. The overall phase of a MAMSK signal is controlled by the phase of the largest component MSK signal which allows the use of a low-complexity differential detector. A closed form expression for the average bit error rate (BER) for coherent detection of an MAMSK in AWGN is derived and is shown to achieve the same BER as that of square constellation quadrature amplitude modulation (QAM) with the same average transmit power. We describe the design and implementation of a STBC-based MIMO radio system in conjunction with MAMSK modulation. The proposed system provides high capacity data transmission by carrying information not only in the phases but also in the amplitude. Despite using a simple MAMSK differential receiver the system achieves performance within 1 dB of coherent detection. The existing MSK modems in conjunction with STBC could easily be modified to construct the proposed system. The MAMSK modulation scheme is extended to a multiuser relaying network where two nodes cooperate in a half-duplex environment to achieve diversity gain. The cooperative scheme is based on superposition modulation using a decode-and-forward (DF) strategy. In the proposed scheme, each node simultaneously transmits its own and the relayed signals by superimposing one on the other. A MAMSK signal is an excellent choice for this type of cooperative communication due its being obtained by a superposition technique. The proposed system exploits the overall phase of a MAMSK signal which allows differential detection and as a result it provides the lowest decoding complexity and memory requirements among the existing superposition based cooperation schemes. The performance of the system is evaluated by simulation, where it is shown that the MAMSK cooperative system outperforms a conventional DF scheme in terms of both power and bandwidth efficiency.

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Lewellen, Mary J. "Working the second shift : perceptions of part-time faculty teaching evening classes at a Midwest community college." CardinalScholar 1.0, 2009. http://liblink.bsu.edu/uhtbin/catkey/1536750.

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Cannistraci, Carlo Vittorio, Tuomo Nieminen, Masahiro Nishi, et al. ""Summer Shift": A Potential Effect of Sunshine on the Time Onset of ST‐Elevation Acute Myocardial Infarction." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-235086.

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Background: ST-elevation acute myocardial infarction (STEMI) represents one of the leading causes of death. The time of STEMI onset has a circadian rhythm with a peak during diurnal hours, and the occurrence of STEMI follows a seasonal pattern with a salient peak of cases in the winter months and a marked reduction of cases in the summer months. Scholars investigated the reason behind the winter peak, suggesting that environmental and climatic factors concur in STEMI pathogenesis, but no studies have investigated whether the circadian rhythm is modified with the seasonal pattern, in particular during the summer reduction in STEMI occurrence. Methods and Results: Here, we provide a multiethnic and multination epidemiological study (from both hemispheres at different latitudes, n=2270 cases) that investigates whether the circadian variation of STEMI onset is altered in the summer season. The main finding is that the difference between numbers of diurnal (6:00 to 18:00) and nocturnal (18:00 to 6:00) STEMI is markedly decreased in the summer season, and this is a prodrome of a complex mechanism according to which the circadian rhythm of STEMI time onset seems season dependent. Conclusions: The “summer shift” of STEMI to the nocturnal interval is consistent across different populations, and the sunshine duration (a measure related to cloudiness and solar irradiance) underpins this season-dependent circadian perturbation. Vitamin D, which in our results seems correlated with this summer shift, is also primarily regulated by the sunshine duration, and future studies should investigate their joint role in the mechanisms of STEMI etiogenesis.

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Fullick, Sarah. "Behavioural and biological relationships between leisure-time physical activity and health outcomes during shift- and night-work." Thesis, Liverpool John Moores University, 2010. http://researchonline.ljmu.ac.uk/5974/.

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Shift-work is increasingly common in society and is associated with a number of health inequalities. The health effects of shift-work can include a redudion in quality and quantity of sleep, insomnia, chronic fatigue, anxiety and depreSSion,decreased vigilance, metabolic syndrome, adverse cardiovascular (especially blood pressure), gastrOintestinal effects and reproductive effects in women. Shift-work is also associated with disturbances to a workers domestic and social life. Physical activity is known to either prevent or alleviate these health inequalities in those with 'normal diurnal' lifestyles such as day-workers. However, shift-work generally decreases opportunities for physical adivity. Moreover, the favourable affects of physical activity on such health inequalities have not been confirmed in shift-workers. The studies in the present thesis are designed to examine the associations between shift-work and physical activity covering a wide range of physiological and psycho-social variables in shift-workers. The first descriptive study was designed to provide the first detailed and multi-researchstrategy examination of LTPA and its correlates in shift-workers. One hundred and sixty one shift-workers partiCipated in the initial cross-sectional study. A cohort of ten of these partiCipants also volunteered for further diary- and inteNiew-based studies. PartiCipants completed the SSI together with a LTPA questionnaire. Gender, job type, age and shift-work experience were explored as correlates of LTPA. The cohort also completed a 7-day diary and wore an accelerometer for assessment of activity counts during work, leisure, and bedtime when working each shift-type (days, nights and rest). Participants also completed a semi-strudured email-administered interview. The total energy expenditure per week in LTPA of male shift-workers was found to be twice that of women. Midwives recorded the lowest LTPA. Firefighters reported the most LTPA. The time spent out of bed during night shift days was 4-h higher compared with rest days. Data from this study indicated that LTPA is generally low amongst shift-workers, the majority of whom are overweight or obese. Jobtype and gender are much more influential on LTPA than age or experience. Shift-workers spend more of their time on rest days in bed. The second descriptive study was designed to explore the relationships between coping strategies adopted by shift-workers and their leisure-time energy expenditure. The importance of coping strategies has been highlighted in previous research. Ninety-five participants completed an adapted version of the completed the SSI together with a LTPA qUestionnaire. Predictors of age, time spent in shift-work, gender, marital status and the various shift-work coping indices were explored with step-wise multiple regression. Leisuretime energy expenditure over a 14-day period was entered as the outcome variable. Gender (p < 0.023) and time spent in shift-work (p < 0.051) were found to be predictors of energy expenditure, with the most experienced, male shift-workers expending the most energy during leisure-time. Overall 'disengagement' coping scores from the SSI were positively related to leisure-time energy expenditure (p < 0.054). In males, disengagement of sleep problems (p > 0.086) was found to be negatively correlated to energy expenditure, whereas disengagement of domestic-related problems was found to be positively related to energy expenditure (p < 0.001). These relations were not found in female shift-workers (p > 0.762). These data indicated that experienced male shift-workers participate in the most leisure-time physical activity. These people 'disengage' more from their domestic-related problems, but less from their sleep-related problems. The next laboratory-based study was designed to examine the acute effects of evening exercise and meal frequency on psychophysiological and performance-related variables during a subsequent period of simulated night-work. Nine healthy participants, completed at least two crossover trials beginning at 18:00 h. Between 19:00-20:00 h, participants either rested or exercised at 50%V02peak and then remained awake throughout the night, completing various tasks until 05:15 h. Six participants completed a total of four trials in which they exercised or rested while either one standardized (SOkJlkg) meal at 22:00 h or two smaller (30 kJ/kg) meals at 22:00 and 02:00 h were eaten. Core Body Temperature (Tc), wrist activity, mood, sleepiness, arousal, self-chosen work-rate, and reaction time were all measured throughout the simulated night-shift. Following exercise, Tcwas Significantly lower throughout the night-shift compared with no prior exercise (95% Cl = 0.00 to 1.01°C), even though wrist activity was higher and sleepiness was lower after exercise. Self-chosen workrate was significantly higher (95% Cl = 20 to 43 W) and reaction time faster during the nightshift that followed exercise. Reaction time and alertness were worst when only 1 meal was ingested during the night-shift (p <0.04). These data indicate that a single bout of evening exercise can improve sleepiness as well as mental and physical performance during a subsequent simulated night-shift ... The findings from the studies in this thesis indicate that many of the short-term health benefits of exercise are apparent in contexts of shift- and night -work. The relatively small final intervention study demonstrates the potential utility of an individualised lifestyle intervention based on motivational interviewing for shift-workers.

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Li, Zhenghong. "The role of the counter rotating terms in spontaneous emission and the time evolution of lamb shift." HKBU Institutional Repository, 2012. https://repository.hkbu.edu.hk/etd_ra/1419.

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Li, Lingxi [Verfasser], Cameron Akademischer Betreuer] Tropea, and Xiaoshu [Akademischer Betreuer] [Cai. "Light Scattering of Complex Particles: Application to the Time-Shift Technique / Lingxi Li ; Cameron Tropea, Xiaoshu Cai." Darmstadt : Universitäts- und Landesbibliothek, 2020. http://d-nb.info/1222163160/34.

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Li, Lingxi [Verfasser], Cameron [Akademischer Betreuer] Tropea, and Xiaoshu [Akademischer Betreuer] Cai. "Light Scattering of Complex Particles: Application to the Time-Shift Technique / Lingxi Li ; Cameron Tropea, Xiaoshu Cai." Darmstadt : Universitäts- und Landesbibliothek, 2020. http://d-nb.info/1222163160/34.

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Robling, Michael. "Measuring change in patient quality of life over time : an evaluation of scale responsiveness and patient response shift." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/54272/.

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Measuring change in quality of life is increasingly central to health services and clinical research evaluation. This requires instruments that are responsive to change, and that the construct being assessed is stable. I have, therefore, addressed two methodological themes: scale responsiveness and instability of the underlying quality of life construct - response shift. Responsiveness theme: I evaluated performance characteristics of a commonly reported effect size statistic, the standardised response mean (SRM). Computer simulations modelled the impact of varying computational method and distributional characteristics upon bias of estimated effect size compared to underlying true value. The studies provide evidence and reassurance that the SRM exhibits little bias when sample size, mean underlying effect size and shape of underlying distribution are varied. However, alternate approaches to handling negative values can produce markedly different effect sizes, making comparison across studies that use different methods problematic. Furthermore, parametric SRMs calculated from lognormal data may provide a greatly inflated estimate of effect size. Response shift theme: I interviewed patients at different stages of clinical management for knee injury twice over six months. A multi-method approach incorporating the individualised SEIQoL-DW measure and a retrospective pretest-posttest using EQ-5D identified evidence of re-calibration, re-prioritisation and re-conceptualisation response shift. An empirically based typology of changes was developed drawn from existing response shift theory, but which further distinguishes subtler forms of change. The studies provide evidence that re-prioritisation and re-conceptualisation may be different levels of the same process. Furthermore, mechanisms producing response shift were identified, in particular, the interaction between level of satisfaction with quality of life domain and its perceived importance. Additional approaches to studying response shift using group level comparison of SEIQoL data were critically evaluated. The thesis extends the methods for identifying, assessing and conceptualising response shift changes whilst also exploring mechanisms which may explain these changes.

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Brodu, Etienne. "Fluxional compiler : Seamless shift from development productivity to performance efficiency, in the case of real-time web applications." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI061/document.

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La plupart des grands services web commencèrent comme de simples projets, et grossirent exponentiellement. Internet supporte cette croissance en étendant les communications et réduisant leur latence. Pendant son développement, une application doit croître exponentiellement, sans quoi elle risque de se faire dépasser par la compétition. Dès le début, il est important de s'assurer de répondre aux besoins du marché : Fail fast. Des langages comme Ruby ou Java sont devenus populaires en proposant la productivité nécessaire pour itérer rapidement sur les retours utilisateurs. Une application web qui répond correctement aux besoins des utilisateurs peut être adoptée de manière virale. Mais à terme, une application doit être efficace pour traiter cette augmentation de trafic. Il est difficile pour une application d'être à la fois productive et efficace. Quand l'audience devient trop importante, il est souvent nécessaire de remplacer l'approche productive pour un modèle plus efficace. Aucune plateforme de développement ne permet de concilier ces deux objectifs, il est donc nécessaire de réécrire l'application vers un modèle plus efficace, tel qu'un pipeline. Ce changement représente un risque. Il implique une quantité de travail conséquente et incertaine. Pour éviter ce risque, cette thèse propose de maintenir conjointement les représentations productives et efficaces d'une même application. Javascript est un langage productif avec une communauté importante. C'est l’environnement d’exécution le plus largement déployé puisqu'il est omniprésent dans les navigateurs, et également sur certains serveurs avec Node.js. Il est maintenant considéré comme le langage principal du web, détrônant Ruby ou Java. De plus, sa boucle évènementielle est similaire à un pipeline. Ces deux modèles d’exécution traitent un flux de requêtes en chaînant des fonctions les unes après les autres. Cependant, la boucle évènementielle permet une approche productive grâce à sa mémoire globale, tandis que le pipeline permet une exécution efficace du fait de sa parallélisation. Cette thèse étudie la possibilité pour une équivalence de transformer une implémentation d'une représentation vers l'autre. Avec cette équivalence, l'équipe de développement peut suivre les deux approches simultanément. Elle peut itérer continuellement pour prendre en compte les avantages des deux approches. Cette thèse présente un compilateur qui permet d'identifier un pipeline dans une application Javascript, et d'isoler chaque étape dans une fluxion. Une fluxion est nommée par contraction entre fonction et flux. Elle exécute une fonction pour chaque datum sur le flux. Les fluxions sont indépendantes, et peuvent être déplacées d'une machine à l'autre pour amortir l'augmentation du trafic. L'équipe de développement peut commencer à développer avec la productivité de la boucle évènementielle. Et avec la transformation, elle peut itérer pour progressivement atteindre l’efficacité du pipeline Most of the now popular web services started as small projects created by few individuals, and grew exponentially. Internet supports this growth because it extends the reach of our communications world wide, while reducing their latency. During its development, an application must grow exponentially, otherwise the risk is to be outpaced by the competition. In the beginning, it is important to verify quickly that the service can respond to the user needs: Fail fast. Languages like Ruby or Java became popular because they propose a productive approach to iterate quickly on user feedbacks. A web application that correctly responds to user needs can become viral. Eventually, the application needs to be efficient to cope with the traffic increase. But it is difficult for an application to be at once productive and efficient. When the user base becomes too important, it is often required to switch the development approach from productivity to efficiency. No platform conciliates these two objectives, so it implies to rewrite the application into an efficient execution model, such as a pipeline. It is a risk as it is a huge and uncertain amount of work. To avoid this risk, this thesis proposes to maintain the productive representation of an application with the efficient one. Javascript is a productive language with a significant community. It is the execution engine the most deployed, as it is present in every browser, and on some servers as well with Node.js. It is now considered as the main language of the web, ousting Ruby or Java. Moreover, the Javascript event-loop is similar to a pipeline. Both execution models process a stream of requests by chaining independent functions. Though, the event-loop supports the needs in development productivity with its global memory, while the pipeline representation allows an efficient execution by allowing parallelization. This thesis studies the possibility for an equivalence to transform an implementation from one representation to the other. With this equivalence, the development team can follow the two approaches concurrently. It can continuously iterate the development to take advantage of their conflicting objectives. This thesis presents a compiler that allows to identify the pipeline from a Javascript application, and isolate its stages into fluxions. A fluxion is named after the contraction between function and flux. It executes a function for each datum on a stream. Fluxions are independent, and can be moved from one machine to the other, so as to cope with the increasing traffic. The development team can begin with the productivity of the event-loop representation. And with the transformation, it can progressively iterate to reach the efficiency of the pipeline representation

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Ravanbakhsh, Samyar. "Elastic travel demand analysis - An application to the West link railway in Gothenburg." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-126542.

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Today the regional railway system lacks the capacity at the central station in order to meet the demand for both the public and freight transportation. The West link is a railway infrastructure project that is expected to both increase train commuting and also increase the train capacity at the central station in Gothenburg. The purpose of this thesis work is to do an elastic demand analysis between car traffic and the West Link in modal shift to determine how many travelers will change mode. Also traffic simulations will be made to investigate the traffic conditions around the stations when the West link has been implemeted. The simulation results showed that nowadays there are congestions on the major highways and some of the smaller low capacity roads. In the future, congestions will become more significant if no countermeasures are implemented like the West link. In the elastic demand analysis the results were overall around 47% 51% on a demand of between 350 000 400 000 trips. As a conclusion it cannot be said whether the West link will ease the pressure on car traffic or not. The reasons are that the population will increase about 100 000 inhabitants until 2030 and the West link is assumed by the region to have this amount of travelers each day. This would result in the same traffic pressure as today with congestions in certain parts. If the number of West link users will be around 200 000, as the results of this thesis shows, then the West link will ease the pressure on car traffic.

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30

Warme, Geoffrey Todd. "The explication and application of a homeostatic shift framework to place conditioning measures during ethanol withdrawal." Oklahoma City : [s.n.], 2006.

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31

Kwan, Kermit S. Jr. "The Role of Penetrant Structure on the Transport and Mechanical Properties of a Thermoset Adhesive." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30666.

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In this work the relationships between penetrant structure, its transport properties, and its effects on the mechanical properties of a polymer matrix were investigated. Although there is a vast amount of data on the diffusion of low molecular weight molecules into polymeric materials and on the mechanical properties of various polymer-penetrant systems, no attempts have been made to inter-relate the two properties with respect to the chemical structure of the diffusant. Therefore, two series of penetrants - n-alkanes and esters - were examined in this context, with the goal of correlating molecular size, shape, and chemical nature of the penetrant to its final transport and matrix mechanical properties. These correlations have been demonstrated to allow quantitative prediction of one property, given a reasonable set of data on the other parameters. A series of n-alkanes (C6-C17) and esters (C5-C17) have been used to separate the effects of penetrant size and shape, from those due to polymer-penetrant interactions, in the diffusion through a polyamide polymeric adhesive. These effects have been taken into account in order to yield a qualitative relationship that allows for prediction of diffusivity based upon penetrant structural information. Transport properties have been analyzed using mass uptake experiments as well as an in-situ FTIR-ATR technique to provide detailed kinetic as well as thermodynamic information on this process. The phenomenon of diffusion and its effects on the resulting dynamic mechanical response of a matrix polymeric adhesive have been studied in great detail using the method of reduced variables. The concept of a diffusion-time shift factor (log aDt) has been introduced to create doubly-reduced master curves, taking into account the effects of temperature and the variations in the polymer mechanical response due to the existence of a low molecular weight penetrant. Ph. D.

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Potter, Chris, Kurt Kosbar, and Adam Panagos. "Effects of Synchronization Error on Space Time Block Codes Equipped with FSK Waveforms." International Foundation for Telemetering, 2009. http://hdl.handle.net/10150/605966.

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ITC/USA 2009 Conference Proceedings / The Forty-Fifth Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2009 / Riviera Hotel & Convention Center, Las Vegas, Nevada Space-time Coding (STC) for Multiple-Input Multiple-Output (MIMO) wireless communication systems is an effective technique for providing robust wireless link performance in telemetry systems. This paper investigates the degradation in system performance when synchronization errors between the transmitter and receiver are present. Specifically, expressions that quantify the increase in symbol-error-rate as a function of symbol synchronization error are derived for a two-transmit and single receive antenna MISO system using binary frequency shift keying waveforms. These results are then extended to the MIMO case. The analytic results are verified with simulation results that show close agreement between the theoretical expressions and Monte Carlo simulation runs.

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Borgil, Bayasgalan. "We could predict good responders to vagus nerve stimulation: a surrogate marker by slow cortical potential shift." Kyoto University, 2017. http://hdl.handle.net/2433/228229.

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Bangerter, Renee. "Since Joseph Smith's Time: Lexical Semantic Shifts in the Book of Mormon." BYU ScholarsArchive, 1998. https://scholarsarchive.byu.edu/etd/4500.

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In the years since Joseph Smith completed the translation of the Book of Mormon, the English language has changed; some common phraseologies and word meanings are dissimilar to today's. Often, in reading the Book of Mormon, we impose our current definitions onto terms that in 1830 had a different meaning. Our interpretation of these words, as well as the passages in which they are found, is skewed by our modern definitions. These words, when they occur in the Book of Mormon, demonstrate dialectal and obsolete senses. In the case of some words, the dialectal or obsolete sense is so far removed in meaning from the prevailing modern sense that Book of Mormon readers may be unsure how to interpret the meaning.In this study I investigate words in the Book of Mormon text that have taken on different meanings, thus leading to potential misreadings within some passages of the text.

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Gorschlüter, Felix [Verfasser], Jürgen [Akademischer Betreuer] Altmann, and Thomas [Gutachter] Weis. "Sinusoids with linear frequency shift in time series – precise characterisation and removal / Felix Gorschlüter. Betreuer: Jürgen Altmann. Gutachter: Thomas Weis." Dortmund : Universitätsbibliothek Dortmund, 2014. http://d-nb.info/1101475749/34.

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Amaya, Austin J. "Beurling-Lax Representations of Shift-Invariant Spaces, Zero-Pole Data Interpolation, and Dichotomous Transfer Function Realizations: Half-Plane/Continuous-Time Versions." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/27636.

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Given a full-range simply-invariant shift-invariant subspace M of the vector-valued L2 space on the unit circle, the classical Beurling-Lax-Halmos (BLH) theorem obtains a unitary operator-valued function W so that M may be represented as the image of of the Hardy space H2 on the disc under multiplication by W. The work of Ball-Helton later extended this result to find a single function representing a so-called dual shift-invariant pair of subspaces (M,MÃ ) which together form a direct-sum decomposition of L2. In the case where the pair (M,MÃ ) are finite-dimensional perturbations of the Hardy space H2 and its orthogonal complement, Ball-Gohberg-Rodman obtained a transfer function realization for the representing function W; this realization was parameterized in terms of zero-pole data computed from the pair (M,MÃ ). Later work by Ball-Raney extended this analysis to the case of nonrational functions W where the zero-pole data is taken in an infinite-dimensional operator theoretic sense. The current work obtains analogues of these various results for arbitrary dual shift-invariant pairs (M,MÃ ) of the L2 spaces on the real line; here, shift-invariance refers to invariance under the translation group. These new results rely on recent advances in the understanding of continuous-time infinite-dimensional input-state-output linear systems which have been codified in the book by Staffans. Ph. D.

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Scheffel, Juliane. "How Germans use their time." Doctoral thesis, Humboldt-Universität zu Berlin, Wirtschaftswissenschaftliche Fakultät, 2011. http://dx.doi.org/10.18452/16376.

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Diese Dissertation besteht aus vier Aufsätzen, die zur empirischen Literatur der Allokation der Arbeitszeit beitragen. Der erste Artikel untersucht die Wechselbeziehung zwischen Arbeit und Sozialleben von Paaren und untersucht die Synchronisation der Arbeitszeiten. Ein neuer Analyseansatz wird vorgeschlagen, der es ermöglicht, den durchschnittlichen Einfluss der Arbeitsbedingungen der deutschen Bevölkerung auf die Allokation der Freizeit zu bestimmen. Der zweite Aufsatz untersucht, ob Arbeit zu unüblichen Bedingungen gemäß der Theorie kompensierender Lohndifferentiale durch höhere Löhne entlohnt wird. Die Ergebnisse zeigen, dass solche Arbeiter 9--10 Prozent höhere Stundenlöhne erhalten. Diese Zuschläge haben einen u-förmigen Verlauf über die Einkommensverteilung für Schichtarbeiter. Die Ausrichtung der Analyse auf monetäre Kompensation solcher Arbeitsbedingungen, vernachlässigt mögliche adverse Auswirkungen auf das Sozialleben und die Gesundheit. Der dritte Artikel untersucht daher nicht-pekuniäre Aspekte. Freizeit wird in solchen Jobs zu einem höheren Anteil allein verbracht, was sich negativ auf das Wohlbefinden auswirken kann, da der Grenznutzen der Freizeit sinkt. Die drastischen Auswirkungen dieser Arbeit zieht ein erhöhtes Risiko auf den mentalen und physischen Gesundheitszustand mit sich, der sich aus einer signifikant niedrigeren Schlafallokation ergibt. Besonders betroffen sind ältere Arbeitnehmer, die eine höhere Wahrscheinlichkeit haben, diesen Arbeitsbedingungen schon über einen längeren Zeitraum ausgesetzt zu sein. Abschließend untersucht der vierte Aufsatz den kausalen Zugewinn auf die elterliche Zeit mit Kindern, den Arbeitnehmer durch mehr zeitliche Arbeitsflexibilität erreichen. Gleitzeitregelungen erlauben es Müttern somit, etwa 30 Prozent mehr ihrer verfügbaren Zeit mit ihren Kindern zu verbringen. Zeitliche Flexibilität kann somit die adversen Effekte der Beschäftigung von Müttern auf die kognitive Entwicklung ihrer Kinder abmildert. This thesis consists of four essays that contribute to the empirical literature of the allocation of market work. The first essay studies the interrelation between working schedules and social life of couples by investigating the synchronization of schedules. A novel approach is proposed that allows for a determination of the average impact of working conditions of the German population on the allocation of leisure. From these findings, couple-specific conclusions concerning the active synchronization of schedules can be drawn. The second essay is devoted to empirically testing the assumption of compensating wage differentials predicting that work at non-standard hours shall be compensated by higher wage rates. The results suggest 9--10 percent higher hourly wage rates. Wage premia are U-shaped across the earnings distribution for shift workers. Since the focus on monetary compensation of such working condition neglects potential adverse consequences on the worker''s social life and individual health, the third essay explores such non-pecuniary aspects. Such jobs entail significantly higher levels of solitary leisure which is likely to adversely affect the worker''s well-being by reducing the marginal utility of leisure. The more severe consequence of work at undesirable hours is the augmented risk to physical and mental health which arises from the significantly lower allocation of time to sleep. In particular older workers who are potentially exposed to such working conditions over a longer time horizon bear the highest risks. Finally, the fourth essay studies the causal gain from temporal work flexibility on parental time with children. Flexitime arrangements allow mothers to spend 30 percent more of their disposable time on childcare. The results are generalizable to Germany as a whole. The paper provides empirical support for the importance of temporal work flexibility on mitigating adverse effects of maternal employment on the child''s cognitive development.

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Herlowsson, Sophie, and Nina Sandberg. "Skiftarbete inom Räddningstjänsten : En kvantitativ och kvalitativ undersökning om arbetsschemats uppbyggnad och konsekvenser." Thesis, Högskolan i Halmstad, Sektionen för hälsa och samhälle (HOS), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-25973.

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Undersökningen syftar till att skapa kunskap om arbetsschemats betydelse hos Räddningstjänsten. Detta genom att undersöka vilka attityder som finns kring arbetstider samt på vilket sätt arbetsschemat upplevs påverka dels arbetets innehåll, dels balansen mellan arbete och privatliv. Vi vill utifrån syftet undersöka hur stor andel som är nöjda respektive missnöjda med arbetsschemat, samt se vad som gör att det uppfattas som bra respektive mindre bra ur olika aspekter. Slutligen vill vi undersöka om det upplevs finnas bättre lösningar till arbetsschemat, ur en arbetsmässig synvinkel samt för privatlivet. Vi genomförde en metodkombination av kvantitativ och kvalitativ metod. Tyngden i undersökningen ligger på den kvantitativa delen eftersom det lyfter fram samtliga brandmäns åsikter, medan de kvalitativa delarna har bidragit till en fördjupad bild av upplevelserna kring arbetsschemat. Resultatet visar att många brandmän är missnöjda med dagens arbetsschema och det har framkommit olika förslag på hur det kan bli bättre, till exempel genom att dela upp dagtidspassen under samtliga veckor. En majoritet upplever att arbetsschemat stör privatlivet, men att de positiva aspekterna väger upp de negativa. Till det positiva hör bland annat att brandmännen är lediga mycket på dagtid och därmed hinner utföra många sysslor. Resultatet har analyserats genom SPSS och teorier om gränser, rollkonflikter och resursbevarande modellen. The study aims to create awareness of the work schedules importance of Emergency Services. This by examine the attitudes that exist around working hours and in which way the work schedule is perceived to affect both the content of work and the balance between work and personal life. Based on the purpose we want to examine the proportion who are satisfied or dissatisfied with the work schedule and see what makes it perceived as good or not good from different aspects. Finally, we want to examine whether it is perceived to be better solutions to the work schedule, from a labor point of view as well as for the personal life. We conducted a method combining quantitative and qualitative methods. The emphasis of the survey is on the quantitative part because it brings out all the firemen's opinions, while the qualitative elements have contributed to a deeper picture of the experiences around the work schedule. The result show that many firefighters are dissatisfied with the current work schedule and have come to different suggestions on how it can be better, for example by splitting the daytime shifts during all weeks. A majority feel that the work schedule interferes with the personal life, but that the positive aspects offsetting the negative. On the positive side, among other things, the firemen are vacant a lot in the daytime and thus have time to do many chores. The results were analyzed by SPSS and theories about boundaries, role conflicts and conservation of resources model.

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Haeger, Donna L. "THE SIGNIFICANCE OF INFLUENCE IN OUR CURRENT WORK ENVIRONMENT: UNDERSTANDING AND EXPLORING THE SHIFT AND EMERGENT DOMAINS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396607105.

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Hagem, Rabee Mouffage. "Real Time Evaluation of Swimmers Performance Based on an Optical Wireless Communication System." Thesis, Griffith University, 2014. http://hdl.handle.net/10072/365345.

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Athlete monitoring using movement sensors can provide important information for coaches and trainers. The main aim of this thesis is to design, implement and test an optical wireless communication link for swimming applications to give real time feedback to the swimmer so that adjustments can be made during swimming. As swimmers are located relatively close to the surface of the water, arm and leg movement can generate a significant number of air bubbles. Total internal reflection from the surface and attenuation due to bubbles is a major problem for communications both below and above the water. For the system the design challenges included: communication type, optical transmitter, bubbles effect, optical receiver, link budget and electronics requirements and optical wavelength. The solution was optical wireless communications in the green spectrum using frequency shift keying (FSK) and on-off keying (OOK). The effect of strong background light was solved using an optical filter on the receiver. This thesis describes a new system to provide a swimmer with real time feedback to adjust stroke rate during swimming. A wrist-mounted accelerometer with a communications link to a receiver located on the goggles allows visual signals to be given to the athlete. As the maximum distance between a swimmer’s wrist and goggles is approximately 1m the communications system must achieve this distance or more. The range varies because of the movement of the swimmer’s arms and head. Thesis (PhD Doctorate) Doctor of Philosophy (PhD) Griffith School of Engineering Science, Environment, Engineering and Technology Full Text

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Lock, Sara-Lina. "”Who has the time to discuss gender equality in that chaos?” : - Mothers perspectives about gender equality when having a child with special needs." Thesis, Linköpings universitet, Institutionen för tema, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-172561.

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This thesis aimed to explore mothers experiences of having a child with special needs througha gender equality perspective. Four mothers were interviewed through a semi-structured interview guide. Feminist disability studies and emotional labor with an intersectional perspective have been the guiding framework. To analyse the empirical material I have used aqualitative thematic analysis. Research has shown that heterosexual couples with children in Sweden are becoming more equal in terms of the unpaid” invisible” household chores. However, parents who has children with disabilities and in need for more extensive care tend to take on more traditional roles. The findings have shown that mothers are more often the one who takes care of the necessary chores concerning the child’s disability. At the same time, she also needs to take a step back in her career or not able to have work outside the home. For some of the families, the necessary chores have been divided into administrative or practical tasks were one parent has done more than the other. To get a deeper knowledge about why it was that certain gender division I have found that the deep emotional connection to their child had an intersectional effect in the decision to stay home for these mothers.

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Lachman, Michael A. "Benchmarking a Transit System on Time-Constrained Trip Chain Access: A Comparative GIS Analysis of Two University Towns." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1483613270824226.

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Torres, Rafael Augusto Tamasauskas. "Gestão do tempo no cotidiano de médicos residentes de clínica médica em um hospital público universitário de São Paulo, Brasil." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/6/6143/tde-28062018-124717/.

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Introdução: A formação médica é um processo complexo que envolve a aquisição de diversas competências. Este processo desenvolve-se durante a graduação e tende a consolidarse na residência médica. Embora seja uma forma reconhecida de capacitação profissional, críticas são feitas em relação à sobrecarga de trabalho, carga horária excessiva e privação de sono. Objetivo: Descrever e analisar estratégias de gestão do tempo no cotidiano de médicos residentes de Clínica Médica em um hospital universitário de São Paulo, Brasil. Métodos: Na 1° fase foram realizadas 8 entrevistas com médicos residentes abordando aspectos de vida pessoal, familiar, empregos, estudo teórico e atividades práticas. Realizada análise de conteúdo com auxílio do programa MaxQDA. Na 2° fase foram preenchidos protocolos de atividades diárias por 7 residentes, 5 no estágio de avaliação pré-operatória e 2 no estágio do pronto-socorro de clínica médica. Calculadas médias individuais e em grupo destes dados. Resultados: Após análise de conteúdo 5 categorias foram selecionadas: a) Organização do trabalho durante as atividades práticas da residência; b) Atividade para aprendizado ou atividade profissional?; c) Moradia, planejamento financeiro e atividades domésticas; d) Tempo para lazer e relacionamentos interpessoais; e) Planejamento familiar / filhos; f) Repouso / Sono. Há relatos de atividades remuneradas não vinculadas a residência, diminuindo o tempo previsto para repouso, estudo ou lazer. Nos períodos de plantões noturnos há uma piora do convívio social e familiar devido ao deslocamento do repouso para o período diurno. O grupo no estágio de avaliação pré-operatório, em dias de atividade na residência, apresentou mediana de tempo diário em atividade de 7,5h; em repouso noturno 6,7h; em estudo teórico 2,2h e no repouso diurno 0h. Para o grupo no estágio do prontosocorro de clínica médica, nos dias de atividades diurnas esses tempos foram 13,0h; 7,0h; 0h e 0h, respectivamente. Para os dias de atividades noturnas, foram 12,5h; 0h; 0h e 7,1h, respectivamente. Discussão: Há diferenças entre trabalho prescrito e real pois a duração da jornada é superior ao previsto em alguns estágios, devido a intercorrências e visitas em enfermarias. O aumento do período da residência permitiria diminuição da carga horária diária, mas impactaria no planejamento pessoal destes médicos. Há uma privação parcial de sono que piora em estágios com plantões, interferindo inclusive em relacionamentos sociais, principalmente fora do ambiente de trabalho. Durante plantões noturnos há um pior desempenho das atividades, incluindo incidentes como interpretação errônea de exames e erros de prescrição médica. Conclusões: Os residentes vivenciam um período de aprendizado intenso, mas que exige uma carga horária elevada e trabalho complexo, com períodos de plantões noturnos e em fins de semana. Optam por adiar o momento da maternidade /paternidade para centrar a atenção nos estudos, seja para a prova de título da especialidade, quanto para um novo concurso de residência. Há diversas estratégias adotadas para gestão do tempo: residir próximo ao hospital; auxílio das atividades domésticas por diaristas; realizar refeições nos restaurantes do hospital; adiamento da maternidade / paternidade; apoio social centrado no convívio com outros residentes e supervisores. Introduction: Medical education concerns in a complex process which involves acquisition of a wide range of skills. This process develops from undergraduate education to medical residency, when it consolidates. As long as it is a recognized way of training, criticisms are made due to work overload, excessive working hours, and sleep deprivation. Objective: To describe and analyze strategies of time management in the daily life of Internal Medicine residents in a university hospital in São Paulo, Brazil. Methods: In the first phase, 8 interviews were conducted with resident physicians addressing aspects of personal and family life, jobs, theoretical study and practical activities. Data analysis was carried out using the MaxQDA program. In the second phase, protocols of daily activities were filled by 7 residents, 5 in the preoperative evaluation internship and 2 in the adult emergency room internship. Individual and group averages of the time spent with residency activities, rest, leisure, study and other jobs were performed. Results: After data analysis, 5 categories were selected: a) Organization of work during the practical activities of the residence; b) Activity for learning or professional activity?; c) Housing, financial planning and domestic activities; d) Time for leisure and interpersonal relationships; e) Family planning / children; f) Rest / Sleep. Paid activities beside the residency program were reported and responsible for decreasing the rest, study and leisure time. During the night shifts was noticed a decrease of social and family ties due to the change of resting hours towards the daytime. For the group in the preoperative evaluation internship, were identified the median daily time in activity of 7,5h of working time, 6,7h of night rest, 2,2h of internal medicine theory study and 0h of daytime rest. For the adult emergency room internship group, the activities hours were 13,0h; 7,0h; 0h and 0h, respectively. Lastly, for night shifts routines, the activities hours were 12,5h; 0h; 0h and 7,1h respectively. Discussion: There are differences between described and factual work since the working shift length is higher than anticipated in some internships, due to intercurrences and medical visits in wards. Increasing the duration of residency programs would let a decrease of daily working hours, but would impact in the personal planning of resident doctors. Sleep deprivation gets worse in internships composed by shift hours, impacting in social relationships outside work. During working shifts is notable a worse performance, being reported incidents such as lab tests misreading and prescription mistakes. Conclusions: Resident physicians experience a period of intense learning that requires a high and complex workload with night and weekend shifts. For that, maternity/paternity is postponed to aim studies for board or fellowship exams. There are various strategies used to improve time management: housing around hospital, support of maid services at home, oncampus feeding and social support centered on other residents and medical staff.

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Vargo, Amy Catherine. ""It Takes Time to Shift Historical Paradigms": Changes in Structure, Governance, Perception, and Practice During a Decade of Child Welfare Policy Reform in Florida." Scholar Commons, 2015. https://scholarcommons.usf.edu/etd/5592.

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This dissertation explored changes in structure, governance, perception and practice within Florida's child welfare system over a ten-year period (2001-2011) inclusive of two concurrent, statewide reform efforts: the privatization of child welfare services and implementation of a Title IV-E Waiver Demonstration. Using an anthropological perspective and holistic approach, the child welfare system is presented as a type of meta-organizational culture inclusive of subsystems and subcultures which are all embedded in historical and socioeconomic context that involves alternations between child safety and family preservation approaches to care. Guided by a grounded theory approach to qualitative data analysis, content analysis of child welfare organization documents, child welfare stakeholder interview transcripts, community governance partner surveys, and observational field notes was performed. Findings are presented within a systems theory framework and include emphasis on (1) systems change as a nonlinear, evolving process that takes time to sustain real change, 2) externalities and emergencies, as well as response to crises as ever present influential factors impacting system change and the creation of shared meaning and perceptions of, 3) the challenges involved in aligning structural views on poverty with practice models that more often employ the idea that poverty is individual, 4) the merit of privatization for social services if the reform is designed to create a public private partnership inclusive of caring for all children and families in a community, and 5) the value of flexibility and variance in local system design in order to best match a community's needs and resources.

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GABORIEAU, JEAN-BAPTISTE. "Evaluation of the potential modal shift induced by the use of a real time multimodal navigator: psycho-social study of travel behaviour and attitude." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2650490.

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Our modern world, and its relative stability, is facing two major threats. The first one is the depletion of fossil fuels resources that feed millions of trucks and boat worldwide, carrying goods from one side of the planet to another. The second one is climate change which, if not limited, will provoke drastically changes to our known environment. One way, that may be the most efficient, to mitigate both threats is to pull people out of their cars, and, to this end, The European White Paper (2011) on transport highlights the essential role of ITS. Today, many cities have deployed multimodal real-time information systems, but few have assessed the impacts of those systems on traveller behaviour. This global context guided the investigation made in the present thesis: in order to analyse potential modal shift induced by the introduction of multimodal navigators, we had to understand psychological factors of decision making. Chapter 1 proposed an extensive review of the current knowledge and state of the art of social psychology as applied in pro-environmental behaviours. We understood some concepts, highlighted some theoretical and methodological flaws that led us to use, though restrictively, some old-fashioned concept of attitude together with some – insufficiently recognised – powerful methodological tools that constitutes the IRT. The objective of this thesis was twofold: 1) assessing the validity of a general attitude measures, in the sense of Campbell and understanding if the generally adopted measure of attitude is compelling within traditional frameworks derived from social psychology theories; 2) make use of psychological determinants influencing modal choice to highlight which segment of the population is more likely to perform a modal shift from cars to public transport or soft modes. To this end, the research was divided in three methodological step: 1) fitting a Rasch model on the General Ecological Behaviour in order to obtain a valid measure of the attitude toward the environment; 2) psycho-social correlational model comparison using Structural Equation Modelling in order to extract the most determining factors behind decision making; 3) a psycho-social based segmentation of ATIS potential users, that would help in identifying the potentiality of ATIS in inducing a modal shift. This research contributed, firstly, in gathering evidence that a wider use of IRT for psychological measurement may be a benefit for the scientific community. Secondly, some newly developed psychological constructs, based on specific values, have been shown to have a significant influence on travel behaviour. We hope that this contribution will allow some other use of specific values and innovative factors research. Finally, we suggest that up to 10% of our sample population may be induced toward a greener urban mobility. As the Opticities research project - within which this thesis has been conducted - is still ongoing, further investigation will be made in the near future. The analysis of in-itinere and ex-post dataset will allow us to understand whether or not people have modified their mobility patterns using the multimodal navigator TUeTO.

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Savas, Zafer. "Real-time Detection And Tracking Of Human Eyes In Video Sequences." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606459/index.pdf.

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Robust, non-intrusive human eye detection problem has been a fundamental and challenging problem for computer vision area. Not only it is a problem of its own, it can be used to ease the problem of finding the locations of other facial features for recognition tasks and human-computer interaction purposes as well. Many previous works have the capability of determining the locations of the human eyes but the main task in this thesis is not only a vision system with eye detection capability Our aim is to design a real-time, robust, scale-invariant eye tracker system with human eye movement indication property using the movements of eye pupil. Our eye tracker algorithm is implemented using the Continuously Adaptive Mean Shift (CAMSHIFT) algorithm proposed by Bradski and the EigenFace method proposed by Turk &amp Pentland. Previous works for scale invariant object detection using Eigenface method are mostly dependent on limited number of user predefined scales which causes speed problems so in order to avoid this problem an adaptive eigenface method using the information extracted from CAMSHIFT algorithm is implemented to have a fast and scale invariant eye tracking. First of all human face in the input image captured by the camera is detected using the CAMSHIFT algorithm which tracks the outline of an irregular shaped object that may change size and shape during the tracking process based on the color of the object. Face area is passed through a number of preprocessing steps such as color space conversion and thresholding to obtain better results during the eye search process. After these preprocessing steps, search areas for left and right eyes are determined using the geometrical properties of the human face and in order to locate each eye indivually the training images are resized by the width information supplied by the CAMSHIFT algortihm. Search regions for left and right eyes are individually passed to the eye detection algortihm to determine the exact locations of each eye. After the detection of eyes, eye areas are individually passed to the pupil detection and eye area detection algorithms which are based on the Active Contours method to indicate the pupil and eye area. Finally, by comparing the geometrical locations of pupil with the eye area, human gaze information is extracted. As a result of this thesis a software named &ldquo TrackEye&rdquo with an user interface having indicators for the location of eye areas and pupils, various output screens for human computer interaction and controls for allowing to test the effects of color space conversions and thresholding types during object tracking has been built.

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Gonzáles, Tanaka José Carlos. "An empirical applicatin of a random level shift model with time-varying probability and mean reversion to the volatility of Latin-America forex market returns." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/8482.

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Following Xu and Perron (2014), this paper uses daily data for six Forex Latin American markets (Argentina, Brazil, Chile, Colombia, Mexico and Peru). Four models of the family of the Random Level Shift (RLS) model are estimated: a basic model where probabilities of level shift are driven by a Bernouilli variable but probability is constant; a model where varying probabilities are allowed and introduced via past extreme returns; a model with mean reversion mechanism; and a model incorporating last two features. Our results prove three striking features: rst, the four RLS models t well the data, with almost all the estimates highly signi cant; second, the long memory property disappears completely from the ACF, including the GARCH e¤ects; and third, the forecasting performance is much better for the RLS models against an overall of four competitor models: GARCH, FIGARCH and two ARFIMA models. Siguiendo el trabajo de Xu y Perron (2014), este documento utiliza datos diarios de volatilidades de retornos cambiarios para seis mercados de América Latina (Argentina, Brazil, Chile, Colombia, Mexico and Peru). Cuatro modelos del tipo Random Level Shifts (RLS) son estimados: un modelo básico donde las probabilidades de cambios de nivel son gobernadas por una variable del tipo Bernouilli pero dicha probabilidad es constante; un modelo donde las probabilidades son cambiantes en el tiempo y dependen de los retornos bursátiles extremos negativos del periodo anterior; un modelo con reversión a la media; y un modelo que incorpora los dos aspectos mencionados anteriormente. Los resultados sugieren tres importantes aspectos: el primero es que los cuatro modelos RLS ajustan bien los datos con prácticamente todos los estimados altamente significativos; segundo, la característica de larga memoria desaparece completamente de la ACF, incluyendo los efectos GARCH; y, tercero, la performance de los cuatro modelos en términos de predicción es buena contra diferentes modelos rivales como los modelos GARCH, FIGARCH, y dos modelos ARFIMA. Tesis

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Naftali, Eran 1971. "First order bias and second order variance of the Maximum Likelihood Estimator with application to multivariate Gaussian data and time delay and Doppler shift estimation." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/88334.

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Lv, Yating. "Application of resting-state fMRI methods to acute ischemic stroke." Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-126910.

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Diffusion weighted imaging (DWI) and dynamic susceptibility contrast-enhanced (DSC) perfusion-weighted imaging (PWI) are commonly employed in clinical practice and in research to give pathophysiological information for patients with acute ischemic stroke. DWI is thought to roughly reflect the severely damaged infarct core, while DSC-PWI reflects the area of hypoperfusion. The volumetric difference between DWI and DSC-PWI is termed the PWI/DWI-mismatch, and has been suggested as an MRI surrogate of the ischemic penumbra. However, due to the application of a contrast agent, which has potentially severe side-effects (e.g., nephrogenic systemic fibrosis), the DSC-PWI precludes repetitive examinations for monitoring purposes. New approaches are being sought to overcome this shortcoming. BOLD (blood oxygen-level dependent) signal can reflect the metabolism of blood oxygen in the brain and hemodynamics can be assessed with resting-state fMRI. The aim of this thesis was to use resting-state fMRI as a new approach to give similar information as DSC-PWI. This thesis comprises two studies: In the first study (see Chapter 2), two resting-state fMRI methods, local methods which compare low frequency amplitudes between two hemispheres and a k-means clustering approach, were applied to investigate the functional damage of patients with acute ischemic stroke both in the time domain and frequency domain. We found that the lesion areas had lower amplitudes than contralateral homotopic healthy tissues. We also differentiated the lesion areas from healthy tissues using a k-means clustering approach. In the second study (see Chapter 3), time-shift analysis (TSA), which assesses time delays of the spontaneous low frequency fluctuations of the resting-state BOLD signal, was applied to give similar pathophysiological information as DSC-PWI in the acute phase of stroke. We found that areas which showed a pronounced time delay to the respective mean time course were very similar to the hypoperfusion area. In summary, we suggest that the resting-state fMRI methods, especially the time-shift analysis (TSA), may provide comparable information to DSC-PWI and thus serve as a useful diagnostic tool for stroke MRI without the need for the application of a contrast agent.

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Gusic, Aner. "Design and implementation of recording functionality for an IP-based set-top box." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2882.

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This theses covers the design and implementation of recording functionality for a set-top box in a home network. An initial investigation is done and possibilities for extending the system to support specific features are presented. Digital TV is becoming more common each day, and soon it will be more widely used than todays analogue standard. At the same time the need for recording TV shows remains the same or is increasing, which is shown by the number of PVR solutions popping up on the market. The goal of this thesis work was to investigate the possibilities for extending an existing set-top box to support common PVR features and, if possible, to implement a prototype. This was supposed to be done in a home network environment with the set-top box as the digital media center. A satisfying solution, covering basic recording functionality is defined and implemented. The solution includes recording to a USB hard drive and to a PC on the local network. On top of this, a graphical user interface is built and some simple benchmarks show the performance of the set-top box with the new functionality.

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Dissertations / Theses on the topic 'Shift time'

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