Academic literature on the topic 'Timekeeping'
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Journal articles on the topic "Timekeeping"
Bartky, Lan R. "Timekeeping." Science 239, no. 4839 (January 29, 1988): 450. http://dx.doi.org/10.1126/science.239.4839.450.b.
Full textBARTKY, LAN R. "Timekeeping." Science 239, no. 4839 (January 29, 1988): 450.2–450. http://dx.doi.org/10.1126/science.239.4839.450.
Full textGillette, Martha U., and Sabra M. Abbott. "Biological Timekeeping." Sleep Medicine Clinics 4, no. 2 (June 2009): 99–110. http://dx.doi.org/10.1016/j.jsmc.2009.01.005.
Full textGillette, Martha U., Sabra M. Abbott, and Jennifer M. Arnold. "Biological Timekeeping." Sleep Medicine Clinics 7, no. 3 (September 2012): 427–42. http://dx.doi.org/10.1016/j.jsmc.2012.06.001.
Full textGiebultowicz, J. "Chronobiology: Biological Timekeeping." Integrative and Comparative Biology 44, no. 3 (June 1, 2004): 266. http://dx.doi.org/10.1093/icb/44.3.266.
Full textMorrison, Philip. "The Timekeeping ELF." Scientific American 278, no. 4 (April 1998): 105–7. http://dx.doi.org/10.1038/scientificamerican0498-105.
Full textFoulkes, Nick. "Timekeeping in worms." Trends in Genetics 16, no. 4 (April 2000): 159. http://dx.doi.org/10.1016/s0168-9525(00)01975-2.
Full textKARATSOREOS, I., and R. SILVER. "Chronobiology: biological timekeeping." Physiology & Behavior 82, no. 5 (October 15, 2004): 927–29. http://dx.doi.org/10.1016/s0031-9384(04)00288-4.
Full textBechtold, David A. "Energy-responsive timekeeping." Journal of Genetics 87, no. 5 (December 2008): 447–58. http://dx.doi.org/10.1007/s12041-008-0067-6.
Full textWu, Carole-Jean, and Margaret Martonosi. "Adaptive timekeeping replacement." ACM Transactions on Architecture and Code Optimization 8, no. 1 (April 2011): 1–26. http://dx.doi.org/10.1145/1952998.1953001.
Full textDissertations / Theses on the topic "Timekeeping"
Crosby, Priya. "Metabolic regulation of circadian timekeeping." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/269019.
Full textClevenson, Hannah (Hannah Anne). "Sensing and timekeeping using a light-trapping diamond waveguide." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111878.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 103-112).
Solid-state quantum systems have emerged as promising sensing platforms. In particular, the spin properties of nitrogen vacancy (NV) color centers in diamond make them outstanding sensors of magnetic fields, electric fields, and temperature under ambient conditions. This thesis focuses on spin-based sensing using multimode diamond waveguide structures to efficiently use large ensembles of NV centers (> 10¹⁰). Temperature-stabilized precision magnetometry, thermometry, and electrometry are discussed. In addition, the precision characterization of the NV ground state structure under a transverse magnetic field and the use of NV-diamond for spin-based clocks are reported.
by Hannah Clevenson.
Ph. D.
Kotru, Krish. "Timekeeping and accelerometry with robust light pulse atom interferometers." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98681.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 165-173).
Light pulse atom interferometry (LPAI) is a powerful technique for precision measurements of inertial forces and time. Laboratory LPAI systems currently achieve state-ofthe- art acceleration sensitivity and establish the international atomic time standard. However, the realization of practical LPAI in dynamic environments (e.g., rapidly accelerating or rotating platforms) has been limited in part by atom optics-the analogues to optical beamsplitters and mirrors. Atom optics in traditional LPAIs are composed of resonant laser pulses that are susceptible to variations in optical detuning and intensity expected in sensors designed for dynamic environments. This thesis investigates atom optics that use frequency- and intensity-modulated laser pulses to suppress sensitivity to these inhomogeneities. For atomic timekeeping applications, a Ramsey LPAI sequence based on stimulated Raman transitions and frequency-swept adiabatic rapid passage (ARP) was developed. Raman ARP drives coherent transfer in an effective two-level atomic system by sweeping the Raman detuning through the two-photon resonance. In experiments with ¹³³Cs atoms, Raman ARP reduced the sensitivity of Ramsey sequences to differential AC Stark shifts by about two orders of magnitude, relative to standard Raman transitions. Raman ARP also preserved fringe contrast despite substantial intensity inhomogeneity. The fractional frequency uncertainty of the ARP Ramsey sequence was limited by second-order Zeeman shifts to ~3.5 x 10-¹² after about 2500 s of averaging. For accelerometry applications, Raman ARP provided efficient, large momentum transfer (LMT) atom optics in an acceleration-sensitive LPAI. These atom optics produced momentum splittings of up to 30 photon recoil momenta between interfering wavepackets-the largest to date for Raman atom optics. This splitting, in principle, enables up to a factor-of-15 improvement in sensitivity over the nominal interferometer. By forgoing cooling methods that reduce atom number, this LMT method reduces the measurement uncertainty due to atom shot-noise and enables large area atom interferometry at higher data-rates. These features could prove useful for fielded inertial sensors based on atom interferometry.
by Krish Kotru.
Ph. D.
Symons, Sarah. "Ancient Egyptian astronomy : timekeeping and cosmography in the New Kingdom." Thesis, University of Leicester, 1999. http://hdl.handle.net/2381/8546.
Full textWu, Nancy Y. (Nancy Yue). "Stability enhancement of atomic timekeeping using Raman adiabatic rapid passage." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/119294.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 83-85).
Current state-of-the-art atomic clocks span the range from large accurate fountain clocks such as the NIST-F2 to relatively small inaccurate chip scale clocks. Small clocks with higher accuracy could greatly expand the range of applications for precision timekeeping, and enable cheaper implementation of existing applications. This type of clock may be realized by use of optical Raman interferometry based on pulsed interrogation of cold atoms. However, this method suffers from serious systematic error sources, e.g., AC Stark shift and Zeeman shift, which alter the atomic resonance frequency. A new method based on adiabatic rapid passage (ARP) has been recently demonstrated at Draper which has significantly reduced phase sensitivity to differential AC Stark shift. It is found that compared to standard Raman, use of ARP enhances timekeeping stability by a factor of three with stability of 2 x 10⁻¹² at 100 seconds. Increasing data rate may also improve short term stability. With all of the above improvements, ARP enhances short term fractional stability to 7 x 10⁻¹² at one second.
by Nancy Y. Wu.
S.M.
Strigel, Brian R. "MARKET ANALYSIS FOR THE MICOZED TIMEKEEPING AND GEOLOCATION SENSOR (TGS)." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1560355697918008.
Full textO'Grady, Joseph Francis. "Molecular biology of timekeeping in the beach amphipod Talitrus saltator (Montagu)." Thesis, Aberystwyth University, 2013. http://hdl.handle.net/2160/6d061b84-80ac-401e-ae99-c1577cb5c006.
Full textHamnett, Ryan. "Molecular and genetic analysis of neuropeptide signalling in mammalian circadian timekeeping." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267953.
Full textAmponsah, Prince Saforo [Verfasser], and Bruce [Akademischer Betreuer] Morgan. "PEROXIREDOXINS - Novel mediators of cellular timekeeping / Prince Saforo Amponsah ; Betreuer: Bruce Morgan." Kaiserslautern : Technische Universität Kaiserslautern, 2020. http://d-nb.info/1203624875/34.
Full textWang, Che-Wei S. M. Massachusetts Institute of Technology. "Tools for mindful timekeeping : 4 devices to change our relationship to time." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98615.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 49-51).
This thesis presents an investigation into the development of a series of devices that alter our relationship to time. The intention behind each of these devices is to help people become more aware of the temporality that is at the core of our being. Time pressure comes from the networks of timekeeping that surround us. It's not just our clocks and watches. Time is synchronized across devices, cities, and continents. Networked time regulates our lives today more than ever before. Modern timekeeping has shaped our culture into one that squeezes productivity out of even the most inconceivably small time increments. Time was once kept at a distance. Church towers and grandfather clocks marked time in space. As technology advanced, timekeeping has shifted inwards and closer to our bodies. Time is embedded in watches, phones, and every digital electronic device that surrounds us. Today, fewer people wear watches and keep time for themselves. We've outsourced our sense of time to systems that we don't understand. Our phones and computers display time accurately without intervention or maintenance, making watches seem redundant. Those who are less aware of time are surrendering to an unfamiliar force. They invite environmental pressures to pull their sense of time away from an innate internal awareness towards a grossly distorted sense that views time as a commodity. Modern timekeeping might help with efficiency, but we are busier today than ever before. While we've shaped our temporal perception through the increasing precision of standardized time, human psychology remains connected to time, but not congruent to the physics of it. If we can become more aware of our relationships to time, we can manage our expectations and counteract temporal illusions, misperceptions, and distortions. The devices presented here call for a more mindful approach to timekeeping. Rather than pushing time into the periphery, I hope to empower people to make time their own. We can challenge the temporal pressures of our environment, culture, technology, and state of mind through an alternative relationship to time.
by Che-Wei Wang.
S.M.
Books on the topic "Timekeeping"
Timekeeping. London: British Library, 1992.
Find full textDale, Rodney. Timekeeping. New York: Oxford University Press, 1992.
Find full textC, Dunlap Jay, Loros Jennifer J, and DeCoursey Patricia J, eds. Chronobiology: Biological timekeeping. Sunderland, Mass: Sinauer Associates, 2004.
Find full textS, Orlove Benjamin, and Wenner-Gren Foundation for Anthropological Research., eds. Repertoires of timekeeping in anthropology. Chicago, Ill: University of Chicago Press, 2002.
Find full textS, Orlove Benjamin, and Wenner-Gren Foundation for Anthropological Research., eds. Repertoires of timekeeping in anthropology. Chicago, Ill: University of Chicago Press, 2002.
Find full text(Firm), Made E.-Z. Products. Attendance monitor made E-Z. 7th ed. Deerfield Beach, FL: Made EZ Products, 2003.
Find full textKumar, Vinod, ed. Biological Timekeeping: Clocks, Rhythms and Behaviour. New Delhi: Springer India, 2017. http://dx.doi.org/10.1007/978-81-322-3688-7.
Full textAmerican Bar Association. Section of Law Practice Management., ed. The lawyer's quick guide to timeslips. Chicago, Ill: American Bar Association, Law Practice Management Section, 1998.
Find full textGloyn, J. C. Early methods of timekeeping, with accompanying science experiments. Newport, I.O.W: Isle of Wight Teachers' Centre, 1987.
Find full textGraf, Johannes. Modern times: Timekeeping on its way to the present. Furtwangen: Deutsches Uhrenmuseum, 2006.
Find full textBook chapters on the topic "Timekeeping"
Baker, Jill L. "Timekeeping." In Technology of the Ancient Near East, 238–50. Milton Park, Abingdon, Oxon: Routledge, 2018.: Routledge, 2018. http://dx.doi.org/10.4324/9781351188111-16.
Full textMaliangkay, Roald. "Colonial timekeeping." In Popular Culture and the Transformation of Japan–Korea Relations, 19–33. London ; New York, NY : Routledge/Taylor & Francis Group, 2020. | Series: Asia’s transformations: Routledge, 2020. http://dx.doi.org/10.4324/9780429399558-3.
Full textBhangal, Sham, John Davey, Jen deHaan, Scott Mebberson, Tim Parker, and Glen Rhodes. "Time and Timekeeping." In Flash MX ActionScript Designer’s Reference, 292–312. Berkeley, CA: Apress, 2002. http://dx.doi.org/10.1007/978-1-4302-5147-7_14.
Full textMatthews, Michael R. "Ancient and Medieval Timekeeping." In Time for Science Education, 47–76. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-3994-6_3.
Full textBrown, Matthew R., and Aleksey V. Matveyenko. "Biological Timekeeping: Scientific Background." In Circadian Rhythm Sleep-Wake Disorders, 1–20. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43803-6_1.
Full textYoung, Michael W. "Circadian Timekeeping in Drosophila." In Handbook of Behavioral Neurobiology, 351–69. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1201-1_14.
Full textAnderson, James L. "Timekeeping in an Expanding Universe." In Revisiting the Foundations of Relativistic Physics, 275–80. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0111-3_11.
Full textSchibler, U. "The Mammalian Circadian Timekeeping System." In Ultradian Rhythms from Molecules to Mind, 261–79. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8352-5_12.
Full textKolkowitz, Shimon, and Jun Ye. "Precision Timekeeping: Optical Atomic Clocks." In Handbook of Laser Technology and Applications, 139–56. 2nd ed. 2nd edition. | Boca Raton : CRC Press, 2021– |: CRC Press, 2021. http://dx.doi.org/10.1201/9781003130123-9.
Full textDeng, Kehui. "The Ancient Chinese Timekeeping Instruments." In The Studies of Heaven and Earth in Ancient China, 95–151. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-7841-0_4.
Full textConference papers on the topic "Timekeeping"
Van Baak, Tom. "Atomic Timekeeping as a Hobby." In 2020 International Technical Meeting of The Institute of Navigation. Institute of Navigation, 2020. http://dx.doi.org/10.33012/2020.17204.
Full textFischer, John. "Resilient Timekeeping for Critical Infrastructure." In 51st Annual Precise Time and Time Interval Systems and Applications Meeting. Institute of Navigation, 2020. http://dx.doi.org/10.33012/2020.17303.
Full textVan Baak, Tom. "Atomic Timekeeping as a Hobby." In 51st Annual Precise Time and Time Interval Systems and Applications Meeting. Institute of Navigation, 2020. http://dx.doi.org/10.33012/2020.17319.
Full textWeaver, G. L., M. Miranian, and J. F. Garstecki. "Composite USO/CSAC timekeeping system." In 2012 IEEE Aerospace Conference. IEEE, 2012. http://dx.doi.org/10.1109/aero.2012.6187111.
Full textde Winkel, Jasper, Carlo Delle Donne, Kasim Sinan Yildirim, Przemysław Pawełczak, and Josiah Hester. "Reliable Timekeeping for Intermittent Computing." In ASPLOS '20: Architectural Support for Programming Languages and Operating Systems. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3373376.3378464.
Full textSoares, Eduardo, Pedro Brandao, and Rui Prior. "Analysis of Timekeeping in Experimentation." In 2020 12th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP). IEEE, 2020. http://dx.doi.org/10.1109/csndsp49049.2020.9249632.
Full textGifford, A., S. R. Stein, and R. A. Nelson. "Timekeeping in future NASA missions." In 18th European Frequency and Time Forum (EFTF 2004). IEE, 2004. http://dx.doi.org/10.1049/cp:20040924.
Full textVoBa, Son, Charles L. Ulland, Michael A. Lombardi, and Arno Lentfer. "Rethinking Timekeeping for Modern IT Solutions." In 50th Annual Precise Time and Time Interval Systems and Applications Meeting. Institute of Navigation, 2019. http://dx.doi.org/10.33012/2019.16764.
Full textWilson, R. E. "International timekeeping for power system users." In 6th International Conference on Developments in Power Systems Protection. IEE, 1997. http://dx.doi.org/10.1049/cp:19970097.
Full textCoddington, Ian, Stefan Droste, Jean-Daniel Deschenes, Laura C. Sinclair, Daniel I. Herman, William C. Swann, and Nathan R. Newbury. "Frequency combs for robust optical timekeeping." In 2016 IEEE Photonics Conference (IPC). IEEE, 2016. http://dx.doi.org/10.1109/ipcon.2016.7830961.
Full textReports on the topic "Timekeeping"
Vessot, R. F. C., D. W. Allan, S. J. B. Crampton, L. S. Cutler, R. H. Kern, A. O. McCoubrey, and J. D. White. Soviet precision timekeeping research and technology. Office of Scientific and Technical Information (OSTI), August 1991. http://dx.doi.org/10.2172/5043248.
Full textMills, D. A Kernel Model for Precision Timekeeping. RFC Editor, March 1994. http://dx.doi.org/10.17487/rfc1589.
Full textForger, Daniel. Modeling the Physiology of Circadian Timekeeping. Fort Belvoir, VA: Defense Technical Information Center, August 2011. http://dx.doi.org/10.21236/ada564079.
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