8,929 research outputs found
Hidden Semi Markov Models for Multiple Observation Sequences: The mhsmm Package for R
No full textThis paper describes the R package mhsmm which implements estimation and prediction methods for hidden Markov and semi-Markov models for multiple observation sequences. Such techniques are of interest when observed data is thought to be dependent on some unobserved (or hidden) state. Hidden Markov models only allow a geometrically distributed sojourn time in a given state, while hidden semi-Markov models extend this by allowing an arbitrary sojourn distribution. We demonstrate the software with simulation examples and an application involving the modelling of the ovarian cycle of dairy cows.
Holtz, Alan R. interview
No full textOral History interview of Alan Holtz. Interview conducted by Grossi, Jared at University of Central Florida- Orlando, FL
Jared Brown Discusses His Book
No full textA Bloomington Normal author and retired theater professor has published his first work of fiction. WGLT’s Charlie Schlenker has more, on the mysteries of Jared Brown
Essentials for Blended Learning: A Standards-Based Guide. Jared Stein and Charles R. Graham
No full textReview of Essentials for Blended Learning: A Standards-Based Guide by Jared Stein and Charles R. Graha
[Letter] 1846 February 22, Cambridge (Mass.) [to] Geo. W. Greene / Jared Sparks.
No full textSparks confirms receipt of Greene\u27s letter and the manuscript from the Boston post office by the last steamer. Sparks requests that Greene make out a list of the contents of each chapter. Sparks recommends that Greene refrain from sending a duplicate of the manuscript until confirming the safe delivery of the original. American historian Jared Sparks wrote about the Early Republic period in American history, publishing on Benjamin Franklin, George Washington, and the American Revolution. He also wrote a _Life of Gouverneur Morris_ (1832), and was a professor at Harvard at the time this letter was written (1839-49); he would later assume the duties of President of Harvard (1849-53). The work alluded to here is _The Life of Nathanael Greene, Major-General in the Army of the Revolution_ (1867-71). George Washington Greene (1811-1883) was an author, educator and historian
The nonlinear future stability of the FLRW family of solutions to the Euler–Einstein system with a positive cosmological constant
No full textOriginal manuscript January 24, 2012In this article, we study small perturbations of the family of Friedmann–Lemaître–Robertson–Walker cosmological background solutions to the 1 + 3 dimensional Euler–Einstein system with a positive cosmological constant. These background solutions describe an initially uniform quiet fluid of positive energy density evolving in a spacetime undergoing accelerated expansion. Our nonlinear analysis shows that under the equation of state p=c[2 over s]ρ, 0 < c[2 over s] < 1/3 , the background solutions are globally future-stable. In particular, we prove that the perturbed spacetime solutions, which have the topological structure [0,∞) × T[superscript 3], are future-causally geodesically complete. These results are extensions of previous results derived by the author in a collaboration with I. Rodnianski, in which the fluid was assumed to be irrotational. Our novel analysis of a fluid with non-zero vorticity is based on the use of suitably defined energy currents.National Science Foundation (U.S.). All-Institutes Postdoctoral Fellowship (Mathematical Sciences Research Institute (Berkeley, Calif.) Grant DMS-0441170
Comparing applied general equilibrium and econometric estimates of the effect of an environmental policy shock
No full textThis file explains the programs and datasets used in the following paper:
Jared C. Carbone, Nicolas Rivers, Akio Yamazaki, and Hidemichi Yonezawa
"Comparing applied general equilibrium and econometric estimates of the
effect of an environmental policy shock," forthcoming in Journal of the
Association of Environmental and Resource Economists.
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There are three folders:
bc_cge.zip
replication_table2_4_5_C1
replication_figures_table3
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CGE Approach
bc_cge.zip contains the CGE model and its results including the benchmark data in Table 1 and the results of the central scenario and sensitivity analysis in Figure 6, 7 and 8, and the further details about the CGE model's replication can be found in the readme.txt within the zip file.
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Econometric Approach
replication_table2_4_5_C1 contains the program and multiple datasets to generate Table 2, 4, 5, and C.1, explained in detail below.
Data
Original data is from Yamazaki (2017) -- comes from CANSIM
Our data is "Carbone_et_al.dta"
Program
Run Carbone_et_al_JAERE.do file for replication of Table 2, 4, 5, and C.1.
This do file also merge other datasets for more control variables, such as oil price, US unemployment rate, population, and trade index. The data on these variables are obtained from these sources listed below.
EIA oil price (crude oil -- WTI)
https://www.eia.gov/dnav/pet/pet_pri_spt_s1_a.htm
US unemployment from Labor Force Statistics from the Current Population Survey (LNS14000000)
https://data.bls.gov/timeseries/LNS14000000
Population data is from Statistics Canada's Table 17-10-0005-01 (formerly CANSIM 051-0001)
https://www150.statcan.gc.ca/t1/tbl1/en/tv.action?pid=1710000501
World trade index (Export volume relative to 1913)
https://ourworldindata.org/trade-and-globalization
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replication_figures_table3 contains programs and datasets required to generate all the figures and Table 3. R software is used to generate them.
TABLE3.R is for Table 3
FIGURE1.R is for Figure 1
FIGURE2.R is for Figure 2
FIGURE3.R is for Figure 3
FIGURE4_5.R is for Figure 4 and 5
FIGURE6_7.R is for Figure 6 and 7
FIGURE8.R is for Figure 8
FIGUREC1.R is for Figure C.1
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Questions regarding this file and any programs and datasets pertains to the econometric approach should be directed to Akio Yamazaki, [email protected]
The Stabilizing Effect of Spacetime Expansion on Relativistic Fluids With Sharp Results for the Radiation Equation of State
No full textAuthor's final manuscript January 10, 2012In this article, we study the 1 + 3-dimensional relativistic Euler equations on a pre-specified conformally flat expanding spacetime background with spatial slices that are diffeomorphic to R[superscript 3]. R 3 . We assume that the fluid verifies the equation of state p = c[2 over s]ρ, p = c s 2 ρ, where 0 ≤ c[subscript s] ≤ √1/3 0 ≤ c s ≤ 1/3 is the speed of sound. We also assume that the reciprocal of the scale factor associated with the expanding spacetime metric verifies a c[subscript s]−dependent time-integrability condition. Under these assumptions, we use the vector field energy method to prove that an explicit family of physically motivated, spatially homogeneous, and spatially isotropic fluid solutions are globally future-stable under small perturbations of their initial conditions. The explicit solutions corresponding to each scale factor are analogs of the well-known spatially flat Friedmann–Lemaitre–Robertson–Walker family. Our nonlinear analysis, which exploits dissipative terms generated by the expansion, shows that the perturbed solutions exist for all future times and remain close to the explicit solutions. This work is an extension of previous results, which showed that an analogous stability result holds when the spacetime is exponentially expanding. In the case of the radiation equation of state p = (1/3)ρ, we also show that if the time-integrability condition for the reciprocal of the scale factor fails to hold, then the explicit fluid solutions are unstable. More precisely, we show the existence of an open family of initial data such that (i) it contains arbitrarily small smooth perturbations of the explicit solutions’ data and (ii) the corresponding perturbed solutions necessarily form shocks in finite time. The shock formation proof is based on the conformal invariance of the relativistic Euler equations when c[2 over s] =1/3, c s 2 = 1/3, which allows for a reduction to a well-known result of Christodoulou.National Science Foundation (U.S.) (Grant DMS-1162211)Solomon Buchsbaum Research FundNational Science Foundation (U.S.). All-Institutes Postdoctoral Fellowship (Mathematical Sciences Research Institute (Berkeley, Calif.) Grant DMS-0441170
The Comic Art of Jared Rogness [poster, 2016]
No full textAlt Text: Poster with an image of a man holding a woman sitting on a series of figures in different poses in dark colors on a gray background. Text in white, yellow, and blue letters.
Transcription: Rod Library. University of Northern Iowa. Ground Floor. the Comic Art of Jared Rogness. A selection of comic art drawings by Jared Rogness. California-based artist-designer and UNI Alumnus. February 29 thru April 4, 2016.
Description: Poster announcing an exhibition of the art and illustrations done by Jared Rogness from February 29 to April 4, 2016 at the Rod Library at the University of Northern Iowa.https://scholarworks.uni.edu/behrens_posters/1152/thumbnail.jp
Use of Lawn Chemicals in the Twin Cities
No full textCreason, Jared R.; Runge, C. Ford. (1992). Use of Lawn Chemicals in the Twin Cities. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/219500
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