Log in

Relevant bibliographies by topics / Drift Period / Journal articles

To see the other types of publications on this topic, follow the link: Drift Period.

Journal articles on the topic 'Drift Period'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Drift Period.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Chaallal, O., L. Guizani, and P. Malenfant. "Drift-based methodology for seismic proportioning of coupled shear walls." Canadian Journal of Civil Engineering 23, no. 5 (1996): 1030–40. http://dx.doi.org/10.1139/l96-910.

Full text

Abstract:

This paper presents a design tool for size proportioning of reinforced concrete coupled shear walls built in seismic regions. It is based on the maximum allowable drift that can be selected by the designer. Free vibration and modal analyses are performed on a variety of coupled shear walls of different heights and geometries. From these analyses, fundamental periods are first related to geometric properties of coupled shear walls and then to maximum interstorey drifts. These maximum drifts are obtained from both spectrum analysis and pseudo-static approach. Closed-form formulas for estimating

APA, Harvard, Vancouver, ISO, and other styles

2

Campos, Ramiro de, Jonathan Rosa, Janet Higuti, Tayane Cristina Buggenhagen, and Ana Carolina de Deus Bueno Krawczyk. "Diel variation of aquatic insect drift in streams of Southern Brazil." Acta Scientiarum. Biological Sciences 43 (September 14, 2021): e54931. http://dx.doi.org/10.4025/actascibiolsci.v43i1.54931.

Full text

Abstract:

Some organisms, such as aquatic insects, are transported from the upstream to downstream region of streams through a process called drift. This process occurs in passive and active ways and can be variable throughout the day, mainly between the nocturnal and diurnal periods. Here, we evaluate the periodicity of the drift of aquatic insects in two streams of the Middle Iguaçu basin, southern region of Brazil. We predicted that the drift of aquatic insects brings the highest richness, diversity and abundance during the nocturnal period, compared to the diurnal period. In addition, we expected th

APA, Harvard, Vancouver, ISO, and other styles

3

Zwally, H. Jay, and John E. Walsh. "Comparison of Observed and Modeled Ice Motion in the Arctic Ocean." Annals of Glaciology 9 (1987): 136–44. http://dx.doi.org/10.3189/s0260305500000513.

Full text

Abstract:

Daily maps of multiyear ice concentration, derived from Nimbus-7 SMMR passive microwave data, are analyzed to obtain the displacement of the multiyear ice edge and information on the convergence/divergence within the pack. The dynamic—thermodynamic sea-ice model of Hibler (1979) is run with daily time steps and with forcing by the interannually varying fields of geostrophic wind and temperature-derived thermodynamic fluxes. Model-data comparisons are made for the net drift during the months of November through January of the 1978—79, 1979—80, and 1980—81 seasons, and for the shorter-term drift

APA, Harvard, Vancouver, ISO, and other styles

4

Zwally, H. Jay, and John E. Walsh. "Comparison of Observed and Modeled Ice Motion in the Arctic Ocean." Annals of Glaciology 9 (1987): 136–44. http://dx.doi.org/10.1017/s0260305500000513.

Full text

Abstract:

Daily maps of multiyear ice concentration, derived from Nimbus-7 SMMR passive microwave data, are analyzed to obtain the displacement of the multiyear ice edge and information on the convergence/divergence within the pack. The dynamic—thermodynamic sea-ice model of Hibler (1979) is run with daily time steps and with forcing by the interannually varying fields of geostrophic wind and temperature-derived thermodynamic fluxes. Model-data comparisons are made for the net drift during the months of November through January of the 1978—79, 1979—80, and 1980—81 seasons, and for the shorter-term drift

APA, Harvard, Vancouver, ISO, and other styles

5

Vyas, B. M., and R. Pandey. "Night-time F-region and daytime E-region ionospheric drifts measured at Udaipur during solar flares." Annales Geophysicae 20, no. 11 (2002): 1837–42. http://dx.doi.org/10.5194/angeo-20-1837-2002.

Full text

Abstract:

Abstract. Ionospheric drifts measured at a low latitude station, Udaipur (Geomag. Lat. 14.5° N), in the night-time F-region and daytime E-region during solar flares have been studied. The night-time observations, which correspond to the F-region drifts, were carried out on five different nights. The daytime observation corresponding to the E-region drifts is only for one day. It is found that the apparent drift during the solar flare period is reduced considerably, in the daytime E-region as well as in the night-time F-region. The East-West and North-South components of the apparent drift spee

APA, Harvard, Vancouver, ISO, and other styles

6

Sankara Prasanna Kumar, M., A. P. Siva Kumar, and K. Prasanna. "Data Mining Models of High Dimensional Data Streams, and Contemporary Concept Drift Detection Methods: a Comprehensive Review." International Journal of Engineering & Technology 7, no. 3.6 (2018): 148. http://dx.doi.org/10.14419/ijet.v7i3.6.14959.

Full text

Abstract:

Concept drift is defined as the distributed data across multiple data streams that change over the time. Concept drift is visible only when the type of collected data changes after some stable period. The emergence of concept drift in data streams leads to increase misclassification and performing degradation of data streams. In order to obtain accurate results, identification of such concept drifts must be visible. This paper focused on a review of the issues related to identifying the changes occurred in the various multivariate high dimensional data streams. The insight of the manuscript is

APA, Harvard, Vancouver, ISO, and other styles

7

Jugier, Rémi, Michaël Ablain, Robin Fraudeau, Adrien Guerou, and Pierre Féménias. "On the uncertainty associated with detecting global and local mean sea level drifts on Sentinel-3A and Sentinel-3B altimetry missions." Ocean Science 18, no. 5 (2022): 1263–74. http://dx.doi.org/10.5194/os-18-1263-2022.

Full text

Abstract:

Abstract. An instrumental drift in the point target response (PTR) parameters has been detected on the Copernicus Sentinel-3A altimetry mission. It will affect the accuracy of sea level sensing, which could result in errors in sea level change estimates of a few tenths of a millimeter per year. In order to accurately evaluate this drift, a method for detecting global and regional mean sea level relative drifts between two altimetry missions is implemented. Associated uncertainties are also accurately calculated thanks to a detailed error budget analysis. A drift on both Sentinel-3A (S3A) and S

APA, Harvard, Vancouver, ISO, and other styles

8

Tian, Qinglin, Kevin I.-Kai Wang, and Zoran Salcic. "An INS and UWB Fusion-Based Gyroscope Drift Correction Approach for Indoor Pedestrian Tracking." Sensors 20, no. 16 (2020): 4476. http://dx.doi.org/10.3390/s20164476.

Full text

Abstract:

Information fusion combining inertial navigation and radio frequency (RF) technologies, is commonly applied in indoor positioning systems (IPSs) to obtain more accurate tracking results. The performance of the inertial navigation system (INS) subsystem is affected by sensor drift over time and the RF-based subsystem aims to correct the position estimate using a fusion filter. However, the inherent sensor drift is usually not corrected during fusion, which leads to increasingly erroneous estimates over a short period of time. Among the inertial sensor drifts, gyroscope drift has the most signif

APA, Harvard, Vancouver, ISO, and other styles

9

Cichowicz, Artur. "Near-Field Ground Motion Modal versus Wave Propagation Analysis." Shock and Vibration 17, no. 4-5 (2010): 611–17. http://dx.doi.org/10.1155/2010/359853.

Full text

Abstract:

The response spectrum generally provides a good estimate of the global displacement and acceleration demand of far-field ground motion on a structure. However, it does not provide accurate information on the local shape or internal deformation of the response of the structure. Near-field pulse-like ground motion will propagate through the structure as waves, causing large, localized deformation. Therefore, the response spectrum alone is not a sufficient representation of near-field ground motion features. Results show that the drift-response technique based on a continuous shear-beam model has

APA, Harvard, Vancouver, ISO, and other styles

10

Hari, S. S., and B. V. Krishna Murthy. "Equatorial night-time F-region zonal electric fields." Annales Geophysicae 13, no. 8 (1995): 871–78. http://dx.doi.org/10.1007/s00585-995-0871-8.

Full text

Abstract:

Abstract. Night-time F-region vertical electrodynamic drifts at the magnetic equatorial station, Trivandrum are obtained for a period of 2 years, 1989 and 1990 (corresponding to solar cycle maximum epoch), using ionosonde h'F data. The seasonal variation of the vertical drift is found to be associated with the longitudinal gradients of the thermospheric zonal wind. Further, the seasonal variation of the prereversal enhancement of the vertical drift is associated with the time difference between the sunset times of the conjugate E-regions (magnetic field line linked to F-region) which is indica

APA, Harvard, Vancouver, ISO, and other styles

11

Sun, Jinyi, Lihong Huang, Ruiqing Li, et al. "Comparison of Secular Trends in Peptic Ulcer Diseases Mortality in China, Brazil and India during 1990–2019: An Age-Period-Cohort Analysis." Healthcare 11, no. 8 (2023): 1085. http://dx.doi.org/10.3390/healthcare11081085.

Full text

Abstract:

Background: Peptic ulcer disease (PUD) is a common disease worldwide, especially in developing countries. China, Brazil, and India are among the world’s fastest-growing emerging economies. This study aimed to assess long-term trends in PUD mortality and explore the effects of age, period, and cohort in China, Brazil, and India. Methods: We collected data from the 2019 Global Burden of Disease Study and used an age–period–cohort (APC) model to estimate the effects of age, period, and cohort. We also obtained net drift, local drift, longitudinal age curve, and period/cohort rate ratios using the

APA, Harvard, Vancouver, ISO, and other styles

12

Eckert, E., T. von Clarmann, M. Kiefer, et al. "Drift-corrected trends and periodic variations in MIPAS IMK/IAA ozone measurements." Atmospheric Chemistry and Physics Discussions 13, no. 7 (2013): 17849–900. http://dx.doi.org/10.5194/acpd-13-17849-2013.

Full text

Abstract:

Abstract. Drifts, trends and periodic variations were calculated from monthly zonally averaged ozone profiles. The ozone profiles, among many other species, were derived from level-1b data of the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) by means of the scientific level-2 processor run by Karlsruhe Institute of Technology (KIT), Institute for Meteorlogy and Climate Research (IMK). All trend and drift analyses were performed using a multilinear parametric trend model which includes a linear term, several harmonics with period lengths from three to twenty four months and

APA, Harvard, Vancouver, ISO, and other styles

13

Zulkifle, Haneef, Fadhilah Yusof, Siti Rohani Mohd Nor, and NURUL SYUHADA SAMSUDIN. "Modelling Period Effect of Lee-Carter Mortality Model with SETAR Model." Journal of Statistical Modelling and Analytics 4, no. 2 (2022): 28–42. http://dx.doi.org/10.22452/josma.vol4no2.3.

Full text

Abstract:

Mortality dynamics plays an important role in understanding mortality and life expectancy that will impact on economy of the countries. Many studies have considered Lee Carter method with time index as an indicator to do the forecasting. In order to forecast the mortality rates, the period index in the Lee Carter model is applied to the random walk with drift model. Despite its performance on the forecasting ability on the Lee Carter model, it is lack in term of time varying parameter that leads to higher error when fitted with random walk of drift and less accurate when forecasting the model.

APA, Harvard, Vancouver, ISO, and other styles

14

Doeg, TJ, and GA Milledge. "Effect of experimentally increasing concentration of suspended sediment on macroinvertebrate drift." Marine and Freshwater Research 42, no. 5 (1991): 519. http://dx.doi.org/10.1071/mf9910519.

Full text

Abstract:

The effect of artificially elevating concentrations of suspended sediment on macroinvertebrate drift was studied in the Acheron River, 100 km north-east of Melbourne. Two experimental channels were established in the stream, and suspended sediment was introduced into one channel over a period of 1.5 h. The second channel was left undisturbed as a control. The concentration of suspended sediment was altered every 15 min, rising and falling to imitate concentrations reported during natural flood events. Drift was collected from two nets at the downstream end of each channel during each 15-min pe

APA, Harvard, Vancouver, ISO, and other styles

15

Xu, Xin, Qijun Zhi, Juntao Bai, et al. "Investigating the Unique Drift Behavior of PSR B2110+27 with FAST." Astrophysical Journal 968, no. 2 (2024): 119. http://dx.doi.org/10.3847/1538-4357/ad4889.

Full text

Abstract:

Abstract Careful scrutiny of the single pulse emissions from PSR B2110+27 has been conducted through highly sensitive observations using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) at a central frequency of 1250 MHz. Our investigation revealed significant subpulse drift behavior and nulling in this pulsar. Moreover, we observed that the nulling events tend to be of short duration, with an estimated overall nulling fraction of approximately 27% ± 3%. It is noteworthy that the drift direction of the subpulses exhibits abrupt changes, occasionally transitioning into a steady

APA, Harvard, Vancouver, ISO, and other styles

16

Ming, Zhao, and Dong Danan. "A new research for the secular polar motion in this century." Symposium - International Astronomical Union 128 (1988): 385–92. http://dx.doi.org/10.1017/s0074180900119771.

Full text

Abstract:

A new research for the secular drift of the Earth's pole was made based on nine long sequences of latitude observations and led to the following conclusions. 1.During this century, the Earth's pole has been moving with a mean rate of about 0″.0016/yr along the meridian about 70° (W). This drift rate is much less than the 0″.0035/yr derived from the ILS sequence.2.Relative to the North American continent, the Ukiah station located on the west coast of the U.S. shows a local drift of about 6 cm/yr northward, which coincides well with that determined by new techniques.3.Referring to the Europe-As

APA, Harvard, Vancouver, ISO, and other styles

17

Volchik, Vyacheslav V. "Ideological Drift in Russian Economic Science." Journal of Institutional Studies 17, no. 2 (2025): 133–45. https://doi.org/10.17835/2076-6297.2025.17.2.133-145.

Full text

Abstract:

The article examines the evolution of ideologies in Russian economic science over the period from 1992 to 2023. Based on a computer analysis of scientific publications from leading Russian economic journals, five main ideological types in economics are identified and characterized. The distribution of articles by ideology over 32 years is presented in six time periods: two six-year periods and four five-year periods. The analysis showed a significant shift in ideological priorities. In the early periods (1992–1997 and 1998–2002), neoliberalism was dominant, reflecting a focus on market reforms

APA, Harvard, Vancouver, ISO, and other styles

18

Lewis, Richard F., David S. Zee, Herschel P. Goldstein, and Barton L. Guthrie. "Proprioceptive and Retinal Afference Modify Postsaccadic Ocular Drift." Journal of Neurophysiology 82, no. 2 (1999): 551–63. http://dx.doi.org/10.1152/jn.1999.82.2.551.

Full text

Abstract:

Drift of the eyes after saccades produces motion of images on the retina (retinal slip) that degrades visual acuity. In this study, we examined the contributions of proprioceptive and retinal afference to the suppression of postsaccadic drift induced by a unilateral ocular muscle paresis. Eye movements were recorded in three rhesus monkeys with a unilateral weakness of one vertical extraocular muscle before and after proprioceptive deafferentation of the paretic eye. Postsaccadic drift was examined in four visual states: monocular viewing with the normal eye (4-wk period); binocular viewing (2

APA, Harvard, Vancouver, ISO, and other styles

19

Jeon, Hansung. "Meaning of the Epic Symbol of Drift in Pyo Hae-rok and Hamel Drift Period." Journal of East-West Comparative Literature 54 (December 31, 2020): 379–405. http://dx.doi.org/10.29324/jewcl.2020.12.54.379.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Pudjisuryadi, Pamuda, William Sumargo, Alvin Kho, and Benjamin Lumantarna. "Performance Evaluation of Simple Regular Buildings using FBD and DDBD Methods with a Consistent Target Drift." Civil Engineering Dimension 27, no. 1 (2025): 59–72. https://doi.org/10.9744/ced.27.1.59-72.

Full text

Abstract:

The Direct Displacement Based Design (DDBD) method, proposed by Priestley, is an alternative to the traditional Force-Based Design (FBD) method for earthquake-resistant design. This study compares the performance of 4-story and 12-story buildings designed using both FBD and DDBD with the same target drift of 2%. The differences in base shear used for the design of the two approaches are discussed. To evaluate the buildings' performance, Nonlinear Dynamic Procedure (NDP) analysis, or nonlinear time history analysis, was conducted considering 500 and 2500 years return period earthquakes. The res

APA, Harvard, Vancouver, ISO, and other styles

21

Li, Chunjiang, Zhijun Li, Baosen Zhang, Yu Deng, Han Zhang, and Shuai Wu. "A Survey Method for Drift Ice Characteristics of the Yellow River Based on Shore-Based Oblique Images." Water 15, no. 16 (2023): 2923. http://dx.doi.org/10.3390/w15162923.

Full text

Abstract:

Acquisition of continuous drift ice characteristic parameters such as ice size, shape, concentration, and drift velocity are of great importance for understanding river freezing and thawing processes. This study acquired hourly oblique images captured by a shore-based camera in the winter of 2021–2022 on the Yellow River, China. The pixel point scale method for correcting oblique images is provided. The 61 lines were measured at the calibration site and the absolute error between the measured value and the calculated value was in the range of 0.009–0.850 m, with a mean error of 0.236 m. After

APA, Harvard, Vancouver, ISO, and other styles

22

Mao, Yadan, and Malcolm L. Heron. "The Influence of Fetch on the Response of Surface Currents to Wind Studied by HF Ocean Surface Radar." Journal of Physical Oceanography 38, no. 5 (2008): 1107–21. http://dx.doi.org/10.1175/2007jpo3709.1.

Full text

Abstract:

Abstract The momentum transfer from wind to sea generates surface currents through both the wind shear stress and the Stokes drift induced by waves. This paper addresses issues in the interpretation of HF radar measurements of surface currents and momentum transfer from air to sea. Surface current data over a 30-day period from HF ocean surface radar are used to study the response of surface currents to wind. Two periods of relatively constant wind are identified—one for the short-fetch condition and the other for the long-fetch condition. Results suggest that the ratio of surface current spee

APA, Harvard, Vancouver, ISO, and other styles

23

Livesey, Nathaniel J., William G. Read, Lucien Froidevaux, et al. "Investigation and amelioration of long-term instrumental drifts in water vapor and nitrous oxide measurements from the Aura Microwave Limb Sounder (MLS) and their implications for studies of variability and trends." Atmospheric Chemistry and Physics 21, no. 20 (2021): 15409–30. http://dx.doi.org/10.5194/acp-21-15409-2021.

Full text

Abstract:

Abstract. The Microwave Limb Sounder (MLS), launched on NASA's Aura spacecraft in 2004, measures vertical profiles of the abundances of key atmospheric species from the upper troposphere to the mesosphere with daily near-global coverage. We review the first 15 years of the record of H2O and N2O measurements from the MLS 190 GHz subsystem (along with other 190 GHz information), with a focus on their long-term stability, largely based on comparisons with measurements from other sensors. These comparisons generally show signs of an increasing drift in the MLS “version 4” (v4) H2O record starting

APA, Harvard, Vancouver, ISO, and other styles

24

He, Dongxu, Xinle Zang, and Lei Ge. "Effect of East Gyro Drift and Initial Azimuth Error on the Compass Azimuth Alignment Convergence Time." Mathematical Problems in Engineering 2020 (May 14, 2020): 1–10. http://dx.doi.org/10.1155/2020/9042197.

Full text

Abstract:

The effect of gyro constant drift and initial azimuth error on the convergence time of compass azimuth is analyzed in this article. Using our designed compass azimuth alignment system, we obtain the responses of gyro constant drift and initial azimuth error in the frequency domain. The corresponding response function in the time domain is derived using the inverse Laplace transform, and its convergence time is then analyzed. The analysis results demonstrate that the convergence time of compass azimuth alignment is related to the second-order damping oscillation period, the gyro constant drift,

APA, Harvard, Vancouver, ISO, and other styles

25

Aslam, O. P. M., Xi Luo, M. S. Potgieter, M. D. Ngobeni, and Xiaojian Song. "Unfolding Drift Effects for Cosmic Rays over the Period of the Sun’s Magnetic Field Reversal." Astrophysical Journal 947, no. 2 (2023): 72. http://dx.doi.org/10.3847/1538-4357/acc24a.

Full text

Abstract:

Abstract A well-established, comprehensive 3D numerical modulation model is applied to simulate galactic protons, electrons, and positrons from 2011 May to 2015 May, including the solar magnetic polarity reversal of Solar Cycle 24. The objective is to evaluate how simulations compare with corresponding Alpha Magnetic Spectrometer observations for 1.0–3.0 GV and what underlying physics follows from this comparison to improve our understanding of how the major physical modulation processes change, especially particle drift, from a negative to a positive magnetic polarity cycle. Apart from their

APA, Harvard, Vancouver, ISO, and other styles

26

Klimushkin, Dmitri, Pavel Mager, Maksim Chelpanov, and Danila Kostarev. "Interaction between long-period ULF waves and charged particle in the magnetosphere: theory and observations (overview)." Solar-Terrestrial Physics 7, no. 4 (2021): 33–66. http://dx.doi.org/10.12737/stp-74202105.

Full text

Abstract:

The paper reviews the current state of the problem of interaction between long-period ultra-low-frequency (ULF) waves and high-energy particles. We consider elements of the theory of energy exchange between waves and particles, particle transport across magnetic shells under the influence of the electromagnetic field of a wave, the acceleration of radiation belt particles by both resonant and non-resonant mechanisms. We examine the mechanisms of generation of azimuthally-small-scale ULF waves due to instabilities arising from the wave–particle resonance. The cases of Alfvén, drift-compressiona

APA, Harvard, Vancouver, ISO, and other styles

27

Lin, Jeng Hsiang. "Peak Story Drift of a Building Structure Subjected to Earthquakes." Applied Mechanics and Materials 580-583 (July 2014): 1439–42. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.1439.

Full text

Abstract:

Many studies have demonstrated that the story drift is the critical parameter that is best correlated with damage in buildings. In this study, an approximate solution for mean value and standard deviation of peak story drift at each story of a building structure under earthquake motions was derived, based on random vibration theory. The accuracy was demonstrated by the Monte Carlo simulation solutions. Comparison of the computed results with the available simulation results indicates that the proposed solution is satisfactory. The results of numerical examples show that the period of a buildin

APA, Harvard, Vancouver, ISO, and other styles

28

Çelebi, Mehmet, Will Prescott, Ross Stein, Ken Hudnut, Jeff Behr, and Steve Wilson. "GPS Monitoring of Dynamic Behavior of Long-Period Structures." Earthquake Spectra 15, no. 1 (1999): 55–66. http://dx.doi.org/10.1193/1.1586028.

Full text

Abstract:

Global Positioning System (GPS) technology with high sampling rates (∼10 sps) allows scientifically justified and economically feasible dynamic measurements of relative displacements of long-period structures—otherwise difficult to measure directly by other means, such as the most commonly used accelerometers that require post-processing including double integration. We describe an experiment whereby the displacement responses of a simulated tall building are measured clearly and accurately in real-time. Such measurements can be used to assess average drift ratios and changes in dynamic charac

APA, Harvard, Vancouver, ISO, and other styles

29

Herman, Jay, Robert Evans, Alexander Cede, et al. "Ozone comparison between Pandora #34, Dobson #061, OMI, and OMPS in Boulder, Colorado, for the period December 2013–December 2016." Atmospheric Measurement Techniques 10, no. 9 (2017): 3539–45. http://dx.doi.org/10.5194/amt-10-3539-2017.

Full text

Abstract:

Abstract. A one-time-calibrated (in December 2013) Pandora spectrometer instrument (Pan #034) has been compared to a periodically calibrated Dobson spectroradiometer (Dobson #061) co-located in Boulder, Colorado, and compared with two satellite instruments over a 3-year period (December 2013–December 2016). The results show good agreement between Pan #034 and Dobson #061 within their statistical uncertainties. Both records are corrected for ozone retrieval sensitivity to stratospheric temperature variability obtained from the Global Modeling Initiative (GMI) and Modern-Era Retrospective analys

APA, Harvard, Vancouver, ISO, and other styles

30

Korotova, G. I., D. G. Sibeck, V. Kondratovich, V. Angelopoulos, and O. D. Constantinescu. "THEMIS observations of compressional pulsations in the dawn-side magnetosphere: a case study." Annales Geophysicae 27, no. 10 (2009): 3725–35. http://dx.doi.org/10.5194/angeo-27-3725-2009.

Full text

Abstract:

Abstract. We present THEMIS-A low- and high-energy plasma, magnetic field, and energetic particle observations of long period (11–36 min) irregular compressional pulsations in the dawnside magnetosphere from 08:00 to 12:24 UT on 7 November 2007. We demonstrate that the pulsations maintain thermal and magnetic pressure balance, then employ finite gyroradius techniques to determine wave properties from the gyrophase distributions of 5–10 keV ions. The waves generally move sunward at velocities ~10 km s−1 with the background plasma convection flow. Wavelengths range from 6700 to 23 300 km, corres

APA, Harvard, Vancouver, ISO, and other styles

31

Prabhakaran Nayar, S. R., T. J. Mathew, C. V. Sreehari, et al. "Electrodynamics of the equatorial F-region ionosphere during pre-sunrise period." Annales Geophysicae 27, no. 1 (2009): 107–11. http://dx.doi.org/10.5194/angeo-27-107-2009.

Full text

Abstract:

Abstract. The electrodynamics of the pre-sunrise equatorial F-region is investigated using HF Doppler radar and digital ionosonde. The observations are limited to those days for which the radar probing frequency is below the foF2 value. The ionosphere observation using HF Doppler radar exhibit interesting features during pre-sunrise period similar to the post sunset pre-reversal enhancement. The most striking feature observed during pre-sunrise period is the sudden downward excursion in the vertical drift around local sunrise followed by an upward turning. Pre-sunrise observations of vertical

APA, Harvard, Vancouver, ISO, and other styles

32

Urman, B., S. M. Pride, and B. Ho Yuen. "Management of overstimulated gonadotrophin cycles with a controlled drift period." Human Reproduction 7, no. 2 (1992): 213–17. http://dx.doi.org/10.1093/oxfordjournals.humrep.a137619.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Eckert, E., T. von Clarmann, M. Kiefer, et al. "Drift-corrected trends and periodic variations in MIPAS IMK/IAA ozone measurements." Atmospheric Chemistry and Physics 14, no. 5 (2014): 2571–89. http://dx.doi.org/10.5194/acp-14-2571-2014.

Full text

Abstract:

Abstract. Drifts, trends and periodic variations were calculated from monthly zonally averaged ozone profiles. The ozone profiles were derived from level-1b data of the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) by means of the scientific level-2 processor run by the Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK). All trend and drift analyses were performed using a multilinear parametric trend model which includes a linear term, several harmonics with period lengths from 3 to 24 months and the quasi-biennial oscillation (QBO

APA, Harvard, Vancouver, ISO, and other styles

34

Tudor, Mihaela, Ana Ramos-Pereira, and de Freitas Joana Gaspar. "CLIMATE VARIABILITY AND ANTHROPOGENIC ACTIONS AS DRIVERS FOR AEOLIAN ACTIVITY DURING THE LAST MILLENNIUM IN SOUTH-WESTERN EUROPE: Um caso de estudo da costa portuguesa." Finisterra 56, no. 118 (2021): 25–50. https://doi.org/10.18055/Finis21158.

Full text

Abstract:

The building of dunes and sand drifts along the European coastline are generally related to climatic variability and sea-level fluctuation. The last phase of dunes formation in south-western Europe coincides with the Little Ice Age (LIA) period characte- rized by pronounced climate variability. Historical sources retrieved from archives also report sand-drift events along the Portuguese coast. The sand invaded many agricultural fields, and settlements, forcing the inhabitants to move elsewhere. The article explores the temporal relationships between sand drift occurrences and climate, as a pri

APA, Harvard, Vancouver, ISO, and other styles

35

Martins, Adelino. "External control and institutional drift in the First Brazilian Republic." Revista de Administração Pública 56, no. 2 (2022): 275–90. http://dx.doi.org/10.1590/0034-761220210305x.

Full text

Abstract:

Abstract This research deals with the development of the federal institutions of external control during the First Brazilian Republic. This subject is scarcely explored in the literature. In general, it is addressed as a background in studies focusing on the recent history of the Federal Court of Accounts, characterized by the emergence of the New Republic (started in 1985). Such studies suggest a historical pattern in the development of federal institutions of external control, characterized by the alternation between periods of expansion and retraction of their attributions. To advance the k

APA, Harvard, Vancouver, ISO, and other styles

36

Tlatova, Kseniya A., Andrey Tlatov, and Valeriya Vasil’eva. "Migration of polar prominences in 13-24 cycles of activity." Proceedings of the International Astronomical Union 13, S340 (2018): 189–90. http://dx.doi.org/10.1017/s1743921318001102.

Full text

Abstract:

AbstractWe are performed the digitization of the prominences from the full disk observations of the Sun in the CaIIK line Kodaikanal Observatory for the period 1904-1954. These data were supplemented by digitization of prominences data on Wolfer atlases for the period 1887-1900 and observations of Kislovodsk Observatory in the period 1957-2017. Particular attention was paid to study of the polar crown prominences drift time. The time interval of the prominence drift is ambiguous from the sunspot cycle amplitude.

APA, Harvard, Vancouver, ISO, and other styles

37

Acosta, Juan, Edén Bojórquez, Juan Bojórquez, et al. "Seismic Performance of Steel Buildings with Eccentrically Braced Frame Systems with Different Configurations." Buildings 14, no. 1 (2024): 118. http://dx.doi.org/10.3390/buildings14010118.

Full text

Abstract:

Although eccentrically braced frames (EBFs) can be used with different configurations according to architectural requirements, it has not yet been indicated which configuration has a better seismic performance; therefore, this paper presents an analytical study focused on evaluating the seismic behavior of various steel buildings with EBF systems, factoring in different configurations. Furthermore, the objective is to compare the performances of EBF systems with one another, to learn more about their structural efficiency. The results obtained indicate that seismic response, in terms of peak i

APA, Harvard, Vancouver, ISO, and other styles

38

Sondheimer, Judith M., and Eric Hoddes. "Gastroesophageal Reflux with Drifting Onset in Infants." Journal of Pediatric Gastroenterology and Nutrition 15, no. 4 (1992): 418–25. http://dx.doi.org/10.1002/j.1536-4801.1992.tb10774.x.

Full text

Abstract:

SummaryWe have characterized the gastroesophageal reflux (GER) episodes which occurred during sleep in 28 infants with pathologic gastroesophageal reflux and 10 symptomatic age‐matched controls without gastroesophageal reflux. We describe three kinds of episodes during the sleeping period‐awake episodes which occur completely during electroencephalogram (EEG)‐defined wakefulness associated with clinical evidence of the waking state (62 episodes), episodes occurring during EEG‐defined sleep which have a rapid drop in pH at their onset (119 episodes), and episodes occurring during EEG‐defined sl

APA, Harvard, Vancouver, ISO, and other styles

39

Crutchfield, J. Stuart, Raj K. Narayan, Claudia S. Robertson, and Lloyd H. Michael. "Evaluation of a fiberoptic intracranial pressure monitor." Journal of Neurosurgery 72, no. 3 (1990): 482–87. http://dx.doi.org/10.3171/jns.1990.72.3.0482.

Full text

Abstract:

✓ The fiberoptic device is a relatively new type of intracranial pressure (ICP) monitor which appears to offer certain advantages over conventional monitoring systems, particularly its ability to measure brain parenchymal pressures. This study was undertaken to analyze the accuracy and drift characteristics of the fiberoptic device and to compare pressures in the subdural, intraparenchymal, and intraventricular compartments. The device was accurate to ± 3 mm Hg over a 0- to 30-mm Hg range in vitro. The maximum daily drift was ± 2.5 mm Hg, with an average daily drift of ± 0.6 mm Hg and an avera

APA, Harvard, Vancouver, ISO, and other styles

40

Thevenin, Deborah M., Rebecca E. Eilers, D. Kimbrough Oller, and Lawrence Lavoie. "Where's the drift in babbling drift? A cross-linguistic study." Applied Psycholinguistics 6, no. 1 (1985): 3–15. http://dx.doi.org/10.1017/s0142716400005981.

Full text

Abstract:

ABSTRACTPrevious research has suggested that infants' early listening experience affects their ability to perceive speech. Many psychologists and linguists have also suggested an early impact of listening experience on prelinguistic production. This belief was formalized in the babbling drift hypothesis (see, e.g., Brown, 1958), which predicts that babbling begins to approximate characteristics of the mother tongue as infants approach meaningful speech. In order to investigate this hypothesis, four experiments were conducted in which adult listeners' perception of the babbling of infants from

APA, Harvard, Vancouver, ISO, and other styles

41

Esamdin, A., A. G. Lyne, M. Kramer, F. Graham-Smith, and R. N. Manchester. "Thirteen Drift Bands in PSR B0826–34." Symposium - International Astronomical Union 218 (2004): 341–42. http://dx.doi.org/10.1017/s0074180900181331.

Full text

Abstract:

By developing a new technique, 13 drifting subpulses have been revealed across one period in PSR B0826–34. The variation of drift rate when drifting subpulses drift through different longitude regions are noticed. A weak emission mode was detected during its apparent null.

APA, Harvard, Vancouver, ISO, and other styles

42

Sofi, Massoud, Graham Leighton Hutchinson, and Colin Duffield. "Review of Techniques for Predicting the Fundamental Period of Multi-Storey Buildings: Effects of Nonstructural Components." International Journal of Structural Stability and Dynamics 15, no. 02 (2015): 1450039. http://dx.doi.org/10.1142/s0219455414500394.

Full text

Abstract:

The design of lateral load resisting elements of tall buildings in regions of low to moderate seismicity is normally governed by the requirements to meet inter-storey drift limit under wind load. The key objective of the design of tall buildings is to provide adequate lateral stiffness to the buildings to limit their lateral deflections and inter-storey drifts under the lateral load. The current design practice assumes that only the structural skeleton provides lateral resistance against wind load. Although the effects of nonstructural elements on the lateral stiffness are widely acknowledged,

APA, Harvard, Vancouver, ISO, and other styles

43

Hudon, Christiane. "Biological Events during Ice Breakup in the Great Whale River (Hudson Bay)." Canadian Journal of Fisheries and Aquatic Sciences 51, no. 11 (1994): 2467–81. http://dx.doi.org/10.1139/f94-246.

Full text

Abstract:

The physical events and changes of abundance of freshwater and marine organisms were documented daily at the mouth of the Great Whale River to a distance of about 5 km in the freshwater plume extending in Hudson Bay. For the 2-wk period before, during, and after the ice breakup, water flow and concentration of coarse (>500 μm) particulate organic matter (CPOM) decreased, while transparency and temperature increased. The Great Whale River outflow to coastal Hudson Bay for that period was estimated to contain 8.8 t of CPOM and 1021 million insects (primarily simulids). Insect drift was positi

APA, Harvard, Vancouver, ISO, and other styles

44

Szary, Andrzej, Joeri van Leeuwen, Geoff Wright, et al. "MeerKAT Observations of the Reversing Drifting Subpulses in PSR J1750-3503." Astrophysical Journal 934, no. 1 (2022): 23. http://dx.doi.org/10.3847/1538-4357/ac75e2.

Full text

Abstract:

Abstract We present an analysis of the subpulse drift in PSR J1750−3503, which is characterized by abrupt transitions of drift direction. As the pulsar does not exhibit other mode changes or clear nulling, it is an ideal candidate system for studying the phenomenon of drift direction change. For ∼80% of the time, the subpulses are characterized by positive drift—from early to later longitudes—while the drift direction is negative in the other ∼20%. The subpulse separation for single pulses with positive drift, P 2 = (18.8 ± 0.1)°, is higher than for single pulses with negative drift, P 2 = (17

APA, Harvard, Vancouver, ISO, and other styles

45

Udayakumar and Kumar B. Harwalkar Aravind. "Analysis of Retrofitted Cold Formed Steel Multistory Building Frame." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 10, no. 11 (2021): 29–39. https://doi.org/10.35940/ijitee.K9468.09101121.

Full text

Abstract:

The cold formed steel section are increasingly used as a structural elements in low rise buildings in recent times, due to the advantages like economic production, easy transportation, low labor cost and high strength to weight ratio. In the current work a G+3 storied building frame is studied for seismic and wind load using Staad-pro software. Light gauge section is taken for beam and slab elements. The seismic analysis is carried out by Equivalent static method. After analysis the results such as story displacement, story drift, Base shear and time period are compared for different models. T

APA, Harvard, Vancouver, ISO, and other styles

46

Page, Brad, Jane McKenzie, Mark A. Hindell, and Simon D. Goldsworthy. "Drift dives by male New Zealand fur seals (Arctocephalus forsteri)." Canadian Journal of Zoology 83, no. 2 (2005): 293–300. http://dx.doi.org/10.1139/z05-013.

Full text

Abstract:

Some phocid seal diving-behaviour studies have identified dives characterised by a period of passive drifting through the water column, rather than active locomotion. During these "drift dives" seals are thought to preferentially direct energy towards processing of food, lactate, or renal metabolites rather than to active propulsion. We describe the first drift dives reported in an otariid, the New Zealand fur seal (Arctocephalus forsteri (Lesson, 1828)), studied at Kangaroo Island in South Australia. Not all males in the study undertook drift dives and those that did were significantly heavie

APA, Harvard, Vancouver, ISO, and other styles

47

Gari, EN, and MC Corigliano. "Spatial and temporal variations of Cocconeis placentula var. euglypta (Ehrenb.) 1854 Grunow, 1884 in drift and periphyton." Brazilian Journal of Biology 67, no. 4 (2007): 587–95. http://dx.doi.org/10.1590/s1519-69842007000400002.

Full text

Abstract:

Spatial and temporal variations of Cocconeis placentula var. euglypta in drift and periphyton were studied in mountain streams of the Córdoba Province (Argentina). The sampling program was conducted in study sites located on a confluence between different order streams during an annual cycle. Samples were also taken every two hours during the daylight period in high and low water conditions. The relationship between drift and cellular reproduction was evaluated by valve length biometrics analysis. C. placentula var. euglypta drift was continuous; its density was not always dependent on periphy

APA, Harvard, Vancouver, ISO, and other styles

48

Somer, A. "New Pulsars from Arecibo Drift Scan Search." International Astronomical Union Colloquium 177 (2000): 17–20. http://dx.doi.org/10.1017/s0252921100058875.

Full text

Abstract:

AbstractWe report the discovery of 3 pulsars, PSR J0030+0451, PSR J0711+09, and PSR J1313+09 that were found in a three dimensional (DM, period, position) search at 430 MHz using the 305m Arecibo telescope. PSR J0030+0451 is a nearby 4.8-millisecond solitary pulsar. Spin and astrometric parameters are presented for the three new pulsars. We have measured significant polarization in the millisecond pulsar, PSR J0030+0451, over more than 50% of the period and use these data and also a morphological decomposition of the profile to briefly discuss magnetospheric models.

APA, Harvard, Vancouver, ISO, and other styles

49

Oikkonen, A., and J. Haapala. "Variability and changes of Arctic sea ice draft distribution – submarine sonar measurements revisited." Cryosphere 5, no. 4 (2011): 917–29. http://dx.doi.org/10.5194/tc-5-917-2011.

Full text

Abstract:

Abstract. Changes in the mean sea ice thickness and concentration in the Arctic are well known. However, quantitative information about changes in the ice thickness distribution and the composition of the pack ice is lacking. In this paper we determine the ice draft distributions, mean and modal thicknesses, and their regional and seasonal variability in the Arctic for the time period 1975–2000. We compare characteristics of the Arctic pack ice for the years 1975–1987 and 1988–2000. These periods represent different large-scale atmospheric circulation modes and sea ice circulation patterns, mo

APA, Harvard, Vancouver, ISO, and other styles

50

Shakal, A. F., M. J. Huang, and R. B. Darragh. "Interpretation of significant ground-response and structure strong motions recorded during the 1994 Northridge earthquake." Bulletin of the Seismological Society of America 86, no. 1B (1996): S231—S246. http://dx.doi.org/10.1785/bssa08601bs231.

Full text

Abstract:

Abstract Some of the largest accelerations and velocities ever recorded at ground-response and structural sites occurred during the Northridge earthquake. These motions are greater than most existing attenuation models would have predicted. Although the motions are large, the correspondence between measured acceleration and damage requires further study, since some sites with high acceleration experienced only moderate damage. Also, some peak vertical accelerations were larger than the horizontal, but in general, they are smaller and fit the pattern observed in previous earthquakes. Strong-mot

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!