tag:crantastic.org,2005:/authors/2527Latest activity for Andrew J Barbour2019-03-20T22:22:27Zcrantastic.orgtag:crantastic.org,2005:TimelineEvent/863302019-03-20T22:22:27Z2019-03-20T22:22:27Zpsd was upgraded to version 1.2.0<a href="/packages/psd">psd</a> was <span class="action">upgraded</span> to version <a href="/packages/psd/versions/82071">1.2.0</a><br /><h3>Package description:</h3><p>Produces power spectral density estimates through iterative refinement of the optimal number of sine-tapers at each frequency. This optimization procedure is based on the method of Riedel and Sidorenko (1995), which minimizes the Mean Square Error (sum of variance and bias) at each frequency, but modified for computational stability.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/835172019-01-11T20:15:19Z2019-01-11T20:15:19Zcrantastic_production tagged kitagawa with Hydrology<a href="/users/146">crantastic_production</a> <span class="action">tagged</span> <a href="/packages/kitagawa">kitagawa</a> with <a href="/task_views/Hydrology">Hydrology</a>crantastic_productiontag:crantastic.org,2005:TimelineEvent/794882018-09-14T19:41:31Z2018-09-14T19:41:31Zkitagawa was upgraded to version 2.2-2<a href="/packages/kitagawa">kitagawa</a> was <span class="action">upgraded</span> to version <a href="/packages/kitagawa/versions/75825">2.2-2</a><br /><h3>Package description:</h3><p>Provides tools to calculate the theoretical hydrodynamic response of an aquifer undergoing harmonic straining or pressurization, or analyze measured responses. There are two classes of models here: (1) for sealed wells, based on the model of Kitagawa et al (2011, <doi:10.1029/2010JB007794>), and (2) for open wells, based on the models of Cooper et al (1965, <doi:10.1029/JZ070i016p03915>), Hsieh et al (1987, <doi:10.1029/WR023i010p01824>), Rojstaczer (1988, <doi:10.1029/JB093iB11p13619>), and Liu et al (1989, <doi:10.1029/JB094iB07p09453>). These models treat strain (or aquifer head) as an input to the physical system, and fluid-pressure (or water height) as the output. The applicable frequency band of these models is characteristic of seismic waves, atmospheric pressure fluctuations, and solid earth tides.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/492692016-03-12T00:15:32Z2016-03-12T00:15:32Zcrantastic_production tagged psd with TimeSeries<a href="/users/146">crantastic_production</a> <span class="action">tagged</span> <a href="/packages/psd">psd</a> with <a href="/task_views/TimeSeries">TimeSeries</a>crantastic_productiontag:crantastic.org,2005:TimelineEvent/437872015-09-19T08:11:21Z2015-09-19T08:11:21Zkelvin was upgraded to version 2.0-0<a href="/packages/kelvin">kelvin</a> was <span class="action">upgraded</span> to version <a href="/packages/kelvin/versions/43579">2.0-0</a><br /><h3>Package description:</h3><p>Uses Bessel functions to calculate the fundamental and complementary analytic solutions to the Kelvin differential equation.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/397352015-03-22T17:51:29Z2015-03-22T17:51:29Zpsd was upgraded to version 1.0-1<a href="/packages/psd">psd</a> was <span class="action">upgraded</span> to version <a href="/packages/psd/versions/39559">1.0-1</a><br /><h3>Package description:</h3><p>Produces power spectral density estimates through iterative refinement of the optimal number of sine-tapers at each frequency. This optimization procedure is based on the method of Riedel and Sidorenko (1995), which minimizes the Mean Square Error (sum of variance and bias) at each frequency, but modified for computational stability.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/396552015-03-18T06:11:31Z2015-03-18T06:11:31Zpsd was upgraded to version 1.0-0<a href="/packages/psd">psd</a> was <span class="action">upgraded</span> to version <a href="/packages/psd/versions/39479">1.0-0</a><br /><h3>Package description:</h3><p>Produces power spectral density estimates through iterative refinement of the optimal number of sine-tapers at each frequency. This optimization procedure is based on the method of Riedel and Sidorenko (1995), which minimizes the Mean Square Error (sum of variance and bias) at each frequency, but modified for computational stability.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/310822013-03-27T22:31:03Z2013-03-27T22:31:03Zpsd was upgraded to version 0.3-2<a href="/packages/psd">psd</a> was <span class="action">upgraded</span> to version <a href="/packages/psd/versions/26403">0.3-2</a><br /><h3>Package description:</h3><p>Power spectral density estimates are produced through iterative refinement of the optimal number of sine-tapers at each frequency. The optimization procedure is based on the method of Riedel and Sidorenko (1995), which applies smoothing that varies with frequency to minimize the sum of variance and bias at each point.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/303622013-03-13T07:10:54Z2013-03-13T07:10:54Zpsd was released<a href="/packages/psd">psd</a> was <span class="action">released</span><br /><h3>Package description:</h3><p>Produces power spectral density estimates through iterative refinement of the optimal number of sine-tapers at each frequency. This optimization procedure is based on the method of Riedel and Sidorenko (1995), which minimizes the Mean Square Error (sum of variance and bias) at each frequency, but modified for computational stability.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/303462013-03-12T17:30:37Z2013-03-12T17:30:37Zkitagawa was upgraded to version 1.1-1<a href="/packages/kitagawa">kitagawa</a> was <span class="action">upgraded</span> to version <a href="/packages/kitagawa/versions/25892">1.1-1</a><br /><h3>Package description:</h3><p>Provides tools to calculate what the theoretical hydrodynamic response will be for borehole strain and fluid-pressure (water height) measurements of seismic waves, for a given set of aquifer parameters. The calculations are based on the model presented by Kitagawa et al (2011); hence, the name of the package.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/303452013-03-12T17:30:36Z2013-03-12T17:30:36Zkelvin was upgraded to version 1.2-1<a href="/packages/kelvin">kelvin</a> was <span class="action">upgraded</span> to version <a href="/packages/kelvin/versions/25891">1.2-1</a><br /><h3>Package description:</h3><p>Uses Bessel functions to calculate the analytic solutions to the Kelvin differential equation, namely the primary (Be) and complementary (Ke) complex functions.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/263882012-10-26T06:30:44Z2012-10-26T06:30:44Zkitagawa was released<a href="/packages/kitagawa">kitagawa</a> was <span class="action">released</span><br /><h3>Package description:</h3><p>Provides tools to calculate the theoretical hydrodynamic response of an aquifer undergoing harmonic straining or pressurization, or analyze measured responses. There are two classes of models here: (1) for sealed wells, based on the model of Kitagawa et al (2011, <doi:10.1029/2010JB007794>), and (2) for open wells, based on the models of Cooper et al (1965, <doi:10.1029/JZ070i016p03915>), Hsieh et al (1987, <doi:10.1029/WR023i010p01824>), Rojstaczer (1988, <doi:10.1029/JB093iB11p13619>), and Liu et al (1989, <doi:10.1029/JB094iB07p09453>). These models treat strain (or aquifer head) as an input to the physical system, and fluid-pressure (or water height) as the output. The applicable frequency band of these models is characteristic of seismic waves, atmospheric pressure fluctuations, and solid earth tides.</p>crantastic.orgtag:crantastic.org,2005:TimelineEvent/256812012-09-27T05:51:10Z2012-09-27T05:51:10Zkelvin was released<a href="/packages/kelvin">kelvin</a> was <span class="action">released</span><br /><h3>Package description:</h3><p>Uses Bessel functions to calculate the fundamental and complementary analytic solutions to the Kelvin differential equation.</p>crantastic.org