Academic literature on the topic 'Time characteristics'

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Journal articles on the topic "Time characteristics"

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Salopek, D. S. "Characteristics of cosmic time." Physical Review D 52, no. 10 (November 15, 1995): 5563–75. http://dx.doi.org/10.1103/physrevd.52.5563.

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Ivashkevych, Ernest, and Iryna Koval. "Psychological Characteristics of Explication of Narration and Time in Graphic Novels." Problems of Modern Psychology : Collection of research papers of Kamianets-Podilskyi National Ivan Ohiienko University, G.S. Kostiuk Institute of Psychology of the National Academy of Educational Sciences of Ukraine, no. 48 (April 16, 2020): 133–53. http://dx.doi.org/10.32626/2227-6246.2020-48.133-153.

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Mishra, Sudha, and Rajendra Singh. "Life-time Performance Characteristics of an Aphid Parasitoid, Lysiphlebus delhiensis (Hymenopetra: Aphidiidae)." Entomologia Generalis 15, no. 3 (October 1, 1990): 173–79. http://dx.doi.org/10.1127/entom.gen/15/1990/173.

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Esmaili, S., S. Krishnan, and K. Raahemifar. "Audio watermarking time-frequency characteristics." Canadian Journal of Electrical and Computer Engineering 28, no. 2 (April 2003): 57–61. http://dx.doi.org/10.1109/cjece.2003.1532509.

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Boteler, D. H. "Characteristics of time-varying inductance." IEEE Transactions on Magnetics 30, no. 2 (March 1994): 172–76. http://dx.doi.org/10.1109/20.312255.

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Lubba, Carl H., Sarab S. Sethi, Philip Knaute, Simon R. Schultz, Ben D. Fulcher, and Nick S. Jones. "catch22: CAnonical Time-series CHaracteristics." Data Mining and Knowledge Discovery 33, no. 6 (August 9, 2019): 1821–52. http://dx.doi.org/10.1007/s10618-019-00647-x.

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Hamza, E., and K. Miskó. "Characteristics of land market in Hungary at the time of the EU accession." Agricultural Economics (Zemědělská ekonomika) 53, No. 4 (January 7, 2008): 161–68. http://dx.doi.org/10.17221/864-agricecon.

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The Agricultural Economics Research Institute has launched a research project with the aim to analyse the Hungarian land market and the changes occurred since the EU accession as well as to present the tendencies of the development. The statistical data on the land market is rather deficient and cannot be considered representative, therefore, we also included some empirical experiments summarising experts’ opinion referring to all the counties of Hungary. In our paper, we provide our statements and conclusions. The survey shows that the landed property market in Hungary is in a state of anticipation. Demand is primarily for outstanding and good quality land of favourable location in certain countries or larger plots of arable and forestry land. Characteristically, the poorer quality, less accessible land of less favourable location in the neighbourhood of the depopulated, cul-de-sac villages is in oversupply. Scattered, wedged properties of small size or of unclear ownership (undivided common land) are difficult to sell. Many of the vendors are older people with subsistence worries or people who obtained the title by compensation but do not wish to get involved in cultivation. Increasingly more buyers are well capitalised farmers, who wish to increase their holdings, or to unite their property (by land swap). Another significant group of buyers wish to invest into landed property located in the neighbourhood of larger cities, at popular sites, next to main roads or motorways. According to our survey, in the immediate years before the EU accession land and lease prices increased significantly, many fold in relation to quality. Increases in land prices are due to a process of convergence to the EU prices intending to take advantage of the projected unified land market. Increases in lease prices are due to apportioning of the projected land based support between owner and lease holder. According to land sale experts (estate or realty agents) the land market will in the 5−10 years liven up resulting in increases in land and lease prices, although the extent of this cannot yet be prognosticated.
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KUTO, Yoshinori, and Sakae YAMAMOTO. "Operator's characteristics of time lag system." Japanese journal of ergonomics 29, Supplement (1993): 342–43. http://dx.doi.org/10.5100/jje.29.supplement_342.

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KATOH, Hisao, and Yasuyuki FUNAHASHI. "Continuous-Time Controllers with Deadbeat Characteristics." Transactions of the Society of Instrument and Control Engineers 32, no. 5 (1996): 699–705. http://dx.doi.org/10.9746/sicetr1965.32.699.

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Holden, John. "Fractal Characteristics of Response Time Variability." Ecological Psychology 14, no. 1 (April 1, 2002): 53–86. http://dx.doi.org/10.1207/s15326969eco1401&2double_4.

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Dissertations / Theses on the topic "Time characteristics"

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Ho, A. Y. K. "Time dependent characteristics in tablet compaction." Thesis, Open University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375495.

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A single punch tablet machine has been instrumented to measure top and bottom punch force and punch displacement. A system has been developed for instrumenting rotary tablet machines using radio telemetery techniques and compared with conventional instrumentation systems. It is shown that the positioning of the measuring devices is critical for accurate measurements of forces and punch displacement. Samples of Micro crystalline cellulose (Avicel PH-102) and various grades of Lactose have been characterised and their compaction properties measured by a variety of techniques including breaking strength, changes in bed density under compaction and stress relaxation. The properties were determined using a specially constructed laboratory compaction simulator capable of reproducing compaction events typical of full scale production. It is shown that none of the conventional indices of compaction behaviour adequately predict the compaction properties of materials as described by their breaking strength: force profile. A phenomenon is described whereby the measurement of maximum force is not coincidental with the measurement of maximum punch penetration. Using model materials it is suggested that these differences are due to the visco elastic and plastic components of materials during compression. A new index - rise time - (the time between the initiation of compression and the point of maximum force application) is proposed as a useful means of predicting the behaviour of pharmaceutical solids during compression.
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Kota, Naga Purna Kiran Kumar. "Analysis of Magnet Wire Life-time Characteristics." MSSTATE, 2005. http://sun.library.msstate.edu/ETD-db/theses/available/etd-11022005-142744/.

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Magnet wires find many applications in modern world. Magnet wires used for the electrical insulation in fly-back transformers, solenoids, sensors, adjustable speed drives etc. are subjected to multistress aging factors such as electrical (high voltage, high frequency), thermal and other environmental stresses. Due to the action of these aging factors degradation and aging of the insulation will occur and thereby lead to reduced life-time or premature failure. In order to identify the most important factors affecting the life-time of the electrical insulation, the insulation must be evaluated under simulated service conditions. This study is done by performing accelerated aging tests at high electrical stresses, elevated temperatures, and often at combined electrical and thermal stresses, and at high frequencies. The electrical phenomena behind the breakdown of the insulation have been studied. In this study accelerated life tests are performed on AWG 40 magnet wire. Life-time characteristics, probability of failures, and life-time percentiles are determined.
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Hall, M. C. "Adaptive IIR filter algorithms for real-time applications." Thesis, University of Liverpool, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234800.

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Firmino, Catarina Filipa Fernandes. "Why do part-time entrepreneurs transition to full time entrepreneurship?" Master's thesis, Instituto Superior de Economia e Gestão, 2015. http://hdl.handle.net/10400.5/10139.

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Mestrado em Finanças
Empreendedorismo a tempo parcial é frequentemente considerado como sendo o primeiro passo para ingressar no empreendedorismo a tempo integral. Este estudo tem como objetivo investigar quais os determinantes que sustentam a transição mencionada. Para a realização deste estudo recorremos a uma base de dados portuguesa, Quadros de Pessoal Os empreendedores portugueses que transitam a sua actividade empresarial em tempo parcial para tempo integral são predominantemente homens com idades entre os 50 e 60 anos. A transição para uma actividade em tempo integral é mais passivel de ocorrer em indivíduos com maior educação e sem experiencia prévia na indústria. Em relação às características das empresas, podemos afirmar que quanto maior o tamanho da empresa no momento da sua fundação, maior será também, a probabilidade de a mesma empresa transitar de uma actividade parcial para uma actividade em tempo integral.
Part-time entrepreneurship is often considered to be the first step to full-time entrepreneurship. This study investigates the reasons and characteristics that lead part-time entrepreneurs to transitions into full-time entrepreneurship. To sustain this research, we ran through a matched employer-employee Portuguese database. Part-time entrepreneurs who transition to full-time are predominantly men individuals with ages between 50 to 65 years. The transition into full-time entrepreneurship is more likely to occur for high educated individuals with no previous industry experience. Additionally individual with a lower tenure and higher hours worked are more likely to move into full-time entrepreneurship. In regard to the ventures' characteristics, we find that, the larger ventures' size at its foundation, the higher is the likelihood of transition into full-time entrepreneurship.
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Rumetshofer, Anna. "Playing the European Postal Code Lottery? : Analysis of Time to Market of new Drugs on the European Market." Thesis, Uppsala universitet, Nationalekonomiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-391498.

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This thesis seeks to investigate the vastly varying time to market of newly approved drugs across Europe. Firtsly, I use a country fixed effects model on data of newly approved drugs from 2014 to 2017 from 18 European countries. I investigate the correlations between medication specific characteristics and the launch time and find that drugs intended to treat HIV, rheumatism or hepatitis are correlated with a faster launch time. Orphan drugs, though they represent a third of the dataset are found to be insignificantly correlated with time to market. Using a drug fixed effects model, I research important country characteristics in relation to the launch time and find that countries with higher imports of medications are correlated with a quicker time to market. Countries with larger medication export sectors experience a longer waiting time, which could be linked to companies trying to hinder the parallel export of new drugs.
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Wang, Min. "Characteristics of item response time for standardized achievement assessments." Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5674.

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Response time (RT) data are able to provide unique insight into both items and examinees regarding speededness and time-demand and should be incorporated into test development practice. To allow test developers to utilize RT information, item RT needs to be summarized into point estimate(PE)(s) that can be understood by content specialists and saved into the item pool. The recent expansion of online testing in K-12 achievement assessments brings opportunities and challenges for measurement experts to investigate and utilize RT information in a context different from that in the majority of literature, in which licensing and certification tests, graduate admission tests, and other applications that incorporate computer-adaptive testing. Using empirical data from four tests in two grade levels of a K-12 standardized achievement assessment, this study explored the empirical distributions of item RT and their fit to five probability distributions, the characteristics of four item RTPEs, and the relationships between item RTPEs and eight item attributes. Based on the principal findings across tests and grades, the empirical distributions of item RT presented widely variable shapes and did not fit any of the five proposed probability distributions; the 90th quantile showed its important capability of capturing and avoiding speededness issues; and the associations between item RTPEs and item attributes proved to be mixed. The generally idiosyncratic findings of this study call for a different perspective and approach to explore RT data and call for more empirical studies to enlighten test development practice in the K-12 standardized achievement assessment field.
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Cicatelli, Giancarlo. "Time warying wake flow characteristics behind turbine blade wakes." Doctoral thesis, Universite Libre de Bruxelles, 1998. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/212070.

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Kee, Charmaine. "Time-averaged and real-time velocity characteristics of the screw wash of a manoevering ship." Thesis, Queen's University Belfast, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486226.

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Experimental investigations of the velocity characteristics related to turbulent propeller-jet flow were carried out. Laser Doppler Anemometry (LDA) was used as the measurement technique. The investigations were performed in a free-surface tank, large enough to allow the unhindered expansion of unconfined propeller jets at bollard-pull. Comprehensive time-averaged (mean) and instantaneous real-time (blade-to- blade) velocity measurements were taken to assess the magnitude and location of the velocities that produce serious seabed scour. The results identify that the propeller blades play an important role in the development of the instantaneous velocity fields up to a downstream distance of two propeller diameters. Beyond this distance, the time-averaged form of measurement resolved all necessary information regarding the axial, radial and rotational velocity components. Establishing methods through which the characteristics of all three-velocity components can be determined using linear regression techniques has been carried out to extend the applications of existing semi-empirical equations. In the absence of suitable linear approximations of the main velocity characteristics, Artificial Neural Network (ANN) programmes were developed as an alternative method of determining the three-dimensional flow fields of a diffusing propeller jet produced in the confines of a harbour basin.
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Virebrand, Marcus. "Real-time monitoring of voice characteristics usingaccelerometer and microphone measurements." Thesis, Linköpings universitet, Reglerteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69760.

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VoxLog is a portable voice accumulator, that uses both an accelerometer that measures skin vibrations and a regular microphone to collect data. The goal of the thesis was to implement and evaluate methods that based on this data estimate the three different voice parameters fundamental frequency, phonation and soundpressure level. For pitch, three different methods were evaluated. The different methods all require relatively low computational power since the goal was to implement at least one of them on the digital signal processor in the VoxLog. The results from these evaluations show that the best estimations of pitch were made with a FFT-based approach that uses phase information to get an estimation with high frequencyresolution. Phonation is estimated with an energy based voice activity detection method.This estimation is then used to choose when sound pressure level should be estimated. Here one of the main problems was to make a distinction between when sound pressure level should be estimated for the wearer of the VoxLog or when an estimation should be made for the background noise. This was solved by implementing a time window before and after phonation were neither is estimated. For both pitch and sound pressure level a feedback functionality was implemented. The feedback is given to the user via vibrations in the VoxLog, the feedback is given when estimated parameters break set limits on pitch or sound pressure level.
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Simas, Maria Joao Correia de 1966. "Lag-time characteristics in small watersheds in the United States." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282155.

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Time is an important element in hydrologic design. Most hydrologic models require a watershed characteristic that reflects the timing of runoff. The time parameter used in this study was lag time, defined as the time from the centroid of rainfall excess to the centroid of direct runoff. Lag times were evaluated from rainfall-runoff data in over 40,000 events in 116 small watersheds in the United States. The watersheds ranged from 0.243 to 3490 acres, with periods of rainfall-runoff records from 3 to 58 years. Rainfall-runoff event characteristics were used to determine a unique value of lag time for each storm. A tendency towards a constant value of lag time for the "bigger" storms was observed, "bigger" meaning higher values of either previous 48-hour rainfall, average effective rainfall intensity, average runoff intensity, or peak flow. The variable peak flow best showed this tendency; higher peak flow was associated with constant lag time in over 90% of the watersheds. Several hydrologic relationships involving lag time previously described in the literature were not verified in this study. Watershed characteristics were evaluated as "predictors" of lag time within a given watershed. The geomorphic variables used were area, length, width, slope, and storage coefficient (Curve Number). All variables were significant in explaining the variation of lag time by the regression analysis. The watersheds were divided into groups to try to explain the variation of lag time between watersheds. Management practices, geographical region, and the tendency toward constant value of lag time for the "bigger" storms had significant effects in the regression analyses, whereas land use and hydrologic behavior did not. When only the watersheds with the tendency described above were used, no groupings significantly improved the regression equations. Rainfall-runoff data should be used to compute lag time directly, especially for the bigger storms. If data are insufficient, regression predictions can be improved by grouping watersheds by regions and management practices. Width, slope and Snat are the best variables for prediction of lag time. The multiple linear regression model developed in this study had a higher coefficient of determination than other models in the literature.
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Books on the topic "Time characteristics"

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Hutchens, Robert M. Worker characteristics, job characteristics, and opportunities for phased retirement. Bonn, Germany: IZA, 2007.

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Winkowski, Józef. On some time-based characteristics of behaviours. Warsaw: Wydawn. IPI PAN, 1991.

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Torres, Luis A. Real-Time Mapping alert system: Characteristics and capabilities. Columbia, S.C: U.S. Geological Survey, 1995.

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Wuest, William J. Time effects on resin-grouted bolt anchorage characteristics. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1991.

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Simonson, John R. Prospective first-time homebuyers: Salient characteristics and their implications. Washington, D.C. (777 14th St., N.W., Washington 20005-3271): Forecasting and Policy Analysis Division, National Association of Realtors, 1989.

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Charldean, Newell, ed. City executives: Leadership roles, work characteristics, and time management. Albany, N.Y: State University of New York Press, 1989.

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Michael, Roe. The state of Tasmania: Identity at Federation time / Michael Roe. Hobart: Tasmanian Historical Research Association, 2001.

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Paul, Hasluck. Light that time has made. [Canberra]: National Library of Australia, 1995.

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Blount, Roy. Long Time Leaving. New York: Knopf Doubleday Publishing Group, 2009.

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Prime time, our time: America's life and times through the prism of television. Rocklin, CA: Prima Pub. & Communications, 1990.

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Book chapters on the topic "Time characteristics"

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Vishwas, B. V., and Ashish Patel. "Time-Series Characteristics." In Hands-on Time Series Analysis with Python, 1–21. Berkeley, CA: Apress, 2020. http://dx.doi.org/10.1007/978-1-4842-5992-4_1.

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Shumway, Robert H., and David S. Stoffer. "Characteristics of Time Series." In Springer Texts in Statistics, 1–46. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-7865-3_1.

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Shumway, Robert H., and David S. Stoffer. "Characteristics of Time Series." In Springer Texts in Statistics, 1–88. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4757-3261-0_1.

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Shumway, Robert H., and David S. Stoffer. "Characteristics of Time Series." In Springer Texts in Statistics, 1–44. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52452-8_1.

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Bezruchko, Boris P., and Dmitry A. Smirnov. "Model Equations: Restoration of Equivalent Characteristics." In Extracting Knowledge From Time Series, 255–73. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12601-7_9.

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Machiwal, Deepesh, and Madan Kumar Jha. "Statistical Characteristics of Hydrologic Time Series." In Hydrologic Time Series Analysis: Theory and Practice, 15–31. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-1861-6_2.

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Ozaki, T. "Non-Gaussian characteristics of exponential autoregressive processes." In Developments in Time Series Analysis, 257–73. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-4515-0_18.

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Polderman, Jan Willem, and Jan C. Willems. "Time- and Frequency-Domain Characteristics of Linear Time-Invariant Systems." In Texts in Applied Mathematics, 281–309. New York, NY: Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4757-2953-5_8.

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Maletzke, André Gustavo, Huei Diana Lee, Gustavo Enrique, Almeida Prado Alves Batista, Cláudio Saddy Rodrigues Coy, João José Fagundes, and Wu Feng Chung. "Time Series Classification with Motifs and Characteristics." In Soft Computing for Business Intelligence, 125–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-53737-0_8.

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Greenberg, William, Cornelis van der Mee, and Vladimir Protopopescu. "Time Dependent Kinetic Equations: Method of Characteristics." In Boundary Value Problems in Abstract Kinetic Theory, 365–403. Basel: Birkhäuser Basel, 1987. http://dx.doi.org/10.1007/978-3-0348-5478-8_11.

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Conference papers on the topic "Time characteristics"

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Schuh, Gunther, Stephan Schroder, Florian Vogt, and Michael Franz. "Description of constituent characteristics of agile development processes for technical systems." In 2019 IEEE 4th International Conference on Technology, Informatics, Management, Engineering & Environment (TIME-E). IEEE, 2019. http://dx.doi.org/10.1109/time-e47986.2019.9353295.

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Campos, Clarke, Marrero, Minea, and Hiraishi. "Computing quantitative characteristics of finite-state real-time systems." In Proceedings Real-Time Systems Symposium. IEEE Comput. Soc. Press, 1994. http://dx.doi.org/10.1109/real.1994.342709.

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Pevzner, M. I. "Intergenerational Volunteer Community: Essential Characteristics And Pedagogical Capacity." In Pedagogical Education: History, Present Time, Perspectives. European Publisher, 2020. http://dx.doi.org/10.15405/epsbs.2020.08.02.95.

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Drozdova, Vera G. "Probability-time characteristics of WiMAX systems." In 2010 11th International Conference and Seminar of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM 2010). IEEE, 2010. http://dx.doi.org/10.1109/edm.2010.5568824.

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Balasubramanian, Ravi, Srinivasan Ramasubramanian, and Alon Efrat. "Coverage Time Characteristics in Sensor Networks." In 2006 IEEE International Conference on Mobile Ad Hoc and Sensor Sysetems. IEEE, 2006. http://dx.doi.org/10.1109/mobhoc.2006.278611.

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Huizhao Tu, H. van Lint, and H. Van Zuylen. "Travel Time Variability versus Freeway Characteristics." In 2006 IEEE Intelligent Transportation Systems Conference. IEEE, 2006. http://dx.doi.org/10.1109/itsc.2006.1706771.

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Parker, Anthony E., and James G. Rathmell. "Analysis of HEMT Time-Evolution Characteristics." In 31st European Microwave Conference, 2001. IEEE, 2001. http://dx.doi.org/10.1109/euma.2001.339139.

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Studer, B. "Characteristics of high frequency fundamental rectangular quartz crystal resonators." In 10th International Conference on European Frequency and Time. IEE, 1996. http://dx.doi.org/10.1049/cp:19960003.

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Czubla, A., R. Osmyk, P. Szterk, P. Krehlik, L. Sliwczynski, R. Szplet, Z. Jachna, and K. Rozyc. "Verification of TIC characteristics for precise optical fiber time transfer links." In 2014 European Frequency and Time Forum (EFTF). IEEE, 2014. http://dx.doi.org/10.1109/eftf.2014.7331507.

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Aloisio, Alberto, Raffaele Giordano, Vincenzo Izzo, Fabrizio Ameli, and Gabriele Giovanetti. "Performance study of a DWDM link with real-time characteristics." In 2009 16th IEEE-NPSS Real Time Conference (RT). IEEE, 2009. http://dx.doi.org/10.1109/rtc.2009.5321847.

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Reports on the topic "Time characteristics"

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Thomas, J. Damage characteristics of time domain histories. Office of Scientific and Technical Information (OSTI), November 1989. http://dx.doi.org/10.2172/7244133.

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Newitt, L. R. Characteristics of time variations of magnetic declination in Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/208240.

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Guzzo, Karen. Characteristics of First-Time Mothers Aged 40 and Older. National Center for Family & Marriage Research, May 2018. http://dx.doi.org/10.25035/ncfmr/fp-18-08.

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Roose, L. D., and G. J. Rohwein. Early-time turn-on characteristics of a high current thyristor. Office of Scientific and Technical Information (OSTI), July 1996. http://dx.doi.org/10.2172/266738.

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Jiang, Yanyao. Environmental Effects on the Incubation Time Characteristics in Stress-Corrosion Cracking. Fort Belvoir, VA: Defense Technical Information Center, April 2011. http://dx.doi.org/10.21236/ada553752.

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Makarov, Yuri V., Shuai Lu, Jian Ma, and Tony B. Nguyen. Assessing the Value of Regulation Resources Based on Their Time Response Characteristics. Office of Scientific and Technical Information (OSTI), June 2008. http://dx.doi.org/10.2172/946001.

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Lewis, Arthur. Seasonal Hidden Markov Models for Stochastic Time Series with Periodically Varying Characteristics. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.6932.

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Rondorf, Dennis W., John W. Beeman, and Mary E. Free. Correlation of Biological Characteristics of Smolts with Survival and Travel Time, 1987 Technical Report. Office of Scientific and Technical Information (OSTI), June 1988. http://dx.doi.org/10.2172/6654459.

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Ma, Mark T. Phase characteristics and time responses of unknown linear systems determined from measured CW amplitude data. Gaithersburg, MD: National Bureau of Standards, 1991. http://dx.doi.org/10.6028/nist.tn.1349.

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Duvvuri, Sarvani, and Srinivas S. Pulugurtha. Researching Relationships between Truck Travel Time Performance Measures and On-Network and Off-Network Characteristics. Mineta Transportation Institute, July 2021. http://dx.doi.org/10.31979/mti.2021.1946.

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Abstract:
Trucks serve significant amount of freight tonnage and are more susceptible to complex interactions with other vehicles in a traffic stream. While traffic congestion continues to be a significant ‘highway’ problem, delays in truck travel result in loss of revenue to the trucking companies. There is a significant research on the traffic congestion mitigation, but a very few studies focused on data exclusive to trucks. This research is aimed at a regional-level analysis of truck travel time data to identify roads for improving mobility and reducing congestion for truck traffic. The objectives of the research are to compute and evaluate the truck travel time performance measures (by time of the day and day of the week) and use selected truck travel time performance measures to examine their correlation with on-network and off-network characteristics. Truck travel time data for the year 2019 were obtained and processed at the link level for Mecklenburg County, Wake County, and Buncombe County, NC. Various truck travel time performance measures were computed by time of the day and day of the week. Pearson correlation coefficient analysis was performed to select the average travel time (ATT), planning time index (PTI), travel time index (TTI), and buffer time index (BTI) for further analysis. On-network characteristics such as the speed limit, reference speed, annual average daily traffic (AADT), and the number of through lanes were extracted for each link. Similarly, off-network characteristics such as land use and demographic data in the near vicinity of each selected link were captured using 0.25 miles and 0.50 miles as buffer widths. The relationships between the selected truck travel time performance measures and on-network and off-network characteristics were then analyzed using Pearson correlation coefficient analysis. The results indicate that urban areas, high-volume roads, and principal arterial roads are positively correlated with the truck travel time performance measures. Further, the presence of agricultural, light commercial, heavy commercial, light industrial, single-family residential, multi-family residential, office, transportation, and medical land uses increase the truck travel time performance measures (decrease the operational performance). The methodological approach and findings can be used in identifying potential areas to serve as truck priority zones and for planning decentralized delivery locations.
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