Industry Organization and Output Size Distribution of Cotton Gins in the U.S.

Selected Paper prepared for presentation at the Southern Agricultural Economics Association Annual Meeting, Orlando, FL, February 6-9, 2010Cotton, cotton gins, transitional probabilities, Markov, minimum efficient scale, Crop Production/Industries, Industrial Organization,

Response of Cotton to Oil Price Shocks

Selected Paper prepared for presentation at the Southern Agricultural Economics Association Annual Meeting, Orlando, FL, February 6-9, 2010Cotton, oil price, demand shocks, supply shocks, structural vector autoregression, Demand and Price Analysis, Industrial Organization,

Romano, Santi

Santi Romano was born in Palermo, Sicily on January 31, 1875. His origins had a notable impact on his legal training, as Palermo was the cradle of a host of renewed legal studies that changed once and for all the way of approaching public law in Italy. His teacher, Vittorio Emanuele Orlando, was both a leading statesman and an innovator of the notion and practice of public and administrative law. The young Romano contributed to a seminal collection of volumes, edited by Orlando, devoted to Italian administrative law, Primo trattato completo di diritto amministrativo italiano (First Complete Treatise on Italian Administrative Law), published between 1900 and 1915. The importance Orlando and his many collaborators attached to such a monumental scholarly enterprise should not go unnoticed: in his preface to the first volume, Orlando emphasized his and the other contributors’ conscious, and eventually successful, attempt at constructing an Italian school of public law. This collection of writings, he claimed, was the necessary counterpoint to the growing expansion of the state’s competences in the public realm. While in the past, Italian scholars had been heavily influenced by the French lawyers who had been working and mulling over the Code Napoléon and, subsequently, by the German pandectists, Orlando insisted that the specialization and evolution of the Italian state called for a full-fledged “homegrown” scholarly apparatus. After obtaining his degree at the University of Palermo, Romano wholeheartedly adhered to this ambitious project

A 10-Year Evaluation of Implants Placed in Fresh Extraction Sockets: A Prospective Cohort Study

none6[Epub ahead of print]Covani U; Chiappe G; Bosco M; Orlando B; Quaranta A; Barone ACovani, U; Chiappe, G; Bosco, M; Orlando, B; Quaranta, Alessandro; Barone, A

The classification of LANDSAT data for the Orlando, Florida, urban fringe area

Procedures used to map residential land cover on the Orlando, Florida, Urban fringe zone are detailed. The NASA Bureau of the Census Applications Systems Verification and Transfer project and the test site are described as well as the LANDSAT data used as the land cover information sources. Both single-date LANDSAT data processing and multitemporal principal components LANDSAT data processing are described. A summary of significant findings is included

A Virtual Pulse: Cautionary Notes about Public Mourning in the Digital Age

Reflections on digital mourning in the wake of the mass shooting at the Pulse nightclub in Orlando 2016

The X-ray cycle in the solar-type star HD 81809

(abridged) Our long-term XMM-Newton program of long-term monitoring of a solar-like star with a well-studied chromospheric cycle, HD 81809 aims to study whether an X-ray cycle is present, along with studying its characteristics and its relation to the chromospheric cycle. Regular observations of HD 81809 were performed with XMM-Newton, spaced by 6 months from 2001 to 2007. We studied the variations in the resulting coronal luminosity and temperature, and compared them with the chromospheric CaII variations. We also modeled the observations in terms of a mixture of active regions, using a methodology originally developed to study the solar corona. Our observations show a well-defined cycle with an amplitude exceeding 1 dex and an average luminosity approximately one order of magnitude higher than in the Sun. The behavior of the corona of HD 81809 can be modeled well in terms of varying coverage of solar-like active regions, with a larger coverage than for the Sun, showing it to be compatible with a simple extension of the solar case.Comment: In press, Astronomy & Astrophysic

Coronal activity cycles in nearby G and K stars - XMM-Newton monitoring of 61 Cygni and Alpha Centauri

We use X-ray observations of the nearby binaries 61 Cyg A/B (K5V and K7V) and Alpha Cen A/B (G2V and K1V) to study the long-term evolution of magnetic activity in weakly to moderately active G + K dwarfs over nearly a decade. Specifically we search for X-ray activity cycles and related coronal changes and compare them to the solar behavior. For 61 Cyg A we find a regular coronal activity cycle analog to its 7.3 yr chromospheric cycle. The X-ray brightness variations are with a factor of three significantly lower than on the Sun, yet the changes of coronal properties resemble the solar behavior with larger variations occurring in the respective hotter plasma components. 61 Cyg B does not show a clear cyclic coronal trend so far, but the X-ray data matches the more irregular chromospheric cycle. Both Alpha Cen stars exhibit significant long-term X-ray variability. Alpha Cen A shows indications for cyclic variability of an order of magnitude with a period of about 12-15 years; the Alpha Cen B data suggests an X-ray cycle with an amplitude of about six to eight and a period of 8-9 years. The sample stars exhibit X-ray luminosities ranging between Lx < 1x10^26 - 3x10^27 erg s^-1 in the 0.2-2.0 keV band and have coronae dominated by cool plasma with variable average temperatures of around 1.0-2.5 MK. We find that coronal activity cycles are apparently a common phenomenon in older, slowly rotating G and K stars. The spectral changes of the coronal X-ray emission over the cycles are solar-like in all studied targets.Comment: 11 pages, 9 figures, accepted by Astronomy and Astrophysic

Role of ejecta clumping and back-reaction of accelerated cosmic rays in the evolution of Type Ia supernova remnants

We investigate the role played by initial clumping of ejecta and by efficient acceleration of cosmic rays (CRs) in determining the density structure of the post-shock region of a Type Ia supernova remnant (SNR) through detailed 3D MHD modeling. Our model describes the expansion of a SNR through a magnetized interstellar medium (ISM), including the initial clumping of ejecta and the effects on shock dynamics due to back-reaction of accelerated CRs. The model predictions are compared to the observations of SN 1006. We found that the back-reaction of accelerated CRs alone cannot reproduce the observed separation between the forward shock (FS) and the contact discontinuity (CD) unless the energy losses through CR acceleration and escape are very large and independent of the obliquity angle. On the contrary, the clumping of ejecta can naturally reproduce the observed small separation and the occurrence of protrusions observed in SN 1006, even without the need of accelerated CRs. We conclude that FS-CD separation is a probe of the ejecta structure at the time of explosion rather than a probe of the efficiency of CR acceleration in young SNRs.Comment: 12 pages, 11 Figures; accepted for publication on ApJ. Version with full resolution images can be found at http://www.astropa.unipa.it/~orlando/PREPRINTS/sorlando_clumping.pd