The Measurement of Agricultural Production in the Utah From 1920 to 1946

As agricultural leaders become increasingly aware of the economics involved in the production and marketing of agricultural products, there develops an increased need for more accurate and more complete methods of measuring agricultural production. This need is not only for the satisfactory measurement of the physical production of a given crop, but is also for a unit of measurement that will make possible a comparison of the production of individual enterprises and groups of enterprises for a given year and from year to year. Because the production of many crops, and livestock and livestock products are customarily measured according to different standards, some in tons, some in bushels, and some in pounds, and also because a given unit of all agricultural products is not of equal significance--a pound of hay and a pound of butterfat for example--the usual measures do not provide a satisfactory basis for comparing the production of different products or groups of products. Some other means of measurement must be used whereby all physical production can be reduced to a common unit of measurement or a common denominator. Modern economists and statisticians are now using the index number as that common denominator

Objective grade specifications for slaughter barrow and gilt carcasses

Hogs are usually sold in the United States on a liveweight basis. Official federal grade standards for hogs were not established until 1952. The purpose of this study was to attempt to develop objective carcass grade specifications for slaughter barrows and gilts. These grade specifications should have economic significance and at the same time should be practical and acceptable to the hog industry. Detailed carcass measurements were made of 600 hog carcasses at the Iowa Packing Company, Des Moines, Iowa. Each carcass then was subjected to a detailed cutout test to determine the weight and quality g:t:ade of the various component wholesale cuts and trimmings. The ratio of the weights of the four high-value lean cuts (hams, loins, picnics and boston butts) to the total carcass weight was computed for each carcass. This ratio (called the index of lean) is a measure of the relative values of the hog carcasses. The higher the index of lean, the higher the value of the carcass, until the point is reached where the carcasses are discounted for lack of quality. Thus, for any schedule of prices for the various wholesale cuts and trimmings there is an optimum index of lean which will yield the highest carcass value

Permutations of context-free, ET0L and indexed languages

© 2016 Discrete Mathematics and Theoretical Computer Science (DMTCS), Nancy, France. For a language L, we consider its cyclic closure, and more generally the language Ck(L), which consists of all words obtained by partitioning words from L into k factors and permuting them. We prove that the classes of ET0L and EDT0L languages are closed under the operators Ck. This both sharpens and generalises Brandstädt's result that if L is context-free then Ck(L) is context-sensitive and not context-free in general for k ≥ 3. We also show that the cyclic closure of an indexed language is indexed

The impact of receiving a diagnosis of Non-Epileptic Attack Disorder (NEAD): a systematic review

Background: Clinicians have reported observations of the immediate cessation of non-epileptic attacks after the diagnosis of NEAD is presented. Objective: The purpose of this systematic review was to examine the impact of receiving a diagnosis of NEAD. Search strategy: A literature search across the databases Medline, PsycINFO, EMBASE, and CINAHL, and additional hand searching, identified 6 original studies meeting criteria for the review. Selection Criteria: Included studies were original peer-reviewed articles investigating the impact of receiving a diagnosis of NEAD on adult populations with at least one outcome measured pre and post-diagnosis. Analysis: The studies were assessed for methodological quality, including biases. This assessment was developed to include criteria specific to research regarding NEAD and diagnosis. Results: Six identified studies, with a total of 153 NEAD participants, examined the impact of receiving a diagnosis on seizure frequency. Two of the six also examined the impact on health-related quality of life. The findings were inconsistent, with approximately half the participants experiencing seizure reduction or cessation post-diagnosis. Diagnosis appeared to have no significant impact on health-related quality of life. The overall evidence lacked quality, particularly in study design and statistical rigour. Conclusions: Mixed results and a lack of high quality evidence was found. Concerns are considered regarding the appropriateness of seizure frequency as the primary outcome measure and the use of epilepsy control groups. Indications for future research include: measuring more meaningful outcomes, using larger samples and power calculations, and ensuring consistent and standard methods for communicating the diagnosis and recording outcomes

The SAMI Galaxy Survey: Satellite galaxies undergo little structural change during their quenching phase

At fixed stellar mass, satellite galaxies show higher passive fractions than centrals, suggesting that environment is directly quenching their star formation. Here, we investigate whether satellite quenching is accompanied by changes in stellar spin (quantified by the ratio of the rotational to dispersion velocity V/$\sigma$) for a sample of massive ($M_{*}>$10$^{10}$ M$_{\odot}$) satellite galaxies extracted from the SAMI Galaxy Survey. These systems are carefully matched to a control sample of main sequence, high $V/\sigma$ central galaxies. As expected, at fixed stellar mass and ellipticity, satellites have lower star formation rate (SFR) and spin than the control centrals. However, most of the difference is in SFR, whereas the spin decreases significantly only for satellites that have already reached the red sequence. We perform a similar analysis for galaxies in the EAGLE hydro-dynamical simulation and recover differences in both SFR and spin similar to those observed in SAMI. However, when EAGLE satellites are matched to their `true' central progenitors, the change in spin is further reduced and galaxies mainly show a decrease in SFR during their satellite phase. The difference in spin observed between satellites and centrals at $z\sim$0 is primarily due to the fact that satellites do not grow their angular momentum as fast as centrals after accreting into bigger halos, not to a reduction of $V/\sigma$ due to environmental effects. Our findings highlight the effect of progenitor bias in our understanding of galaxy transformation and they suggest that satellites undergo little structural change before and during their quenching phase.Comment: 11 pages, 7 figures. Accepted for publication in MNRA

Galaxy And Mass Assembly (GAMA) : The mechanisms for quiescent galaxy formation at z<1

© 2016 The Authors. One key problem in astrophysics is understanding how and why galaxies switch off their star formation, building the quiescent population that we observe in the local Universe. From the Galaxy And Mass Assembly and VIsible MultiObject Spectrograph Public Extragalactic Redshift surveys, we use spectroscopic indices to select quiescent and candidate transition galaxies.We identify potentially rapidly transitioning post-starburst (PSB) galaxies and slower transitioning green-valley galaxies. Over the last 8Gyr, the quiescent population has grown more slowly in number density at high masses (M * > 10 11 M ⊙ ) than at intermediate masses (M * > 10 10.6 M ⊙ ). There is evolution in both the PSB and green-valley stellar mass functions, consistent with higher mass galaxies quenching at earlier cosmic times.At intermediatemasses (M * > 10 10.6 M ⊙ ), we find a green-valley transition time-scale of 2.6 Gyr. Alternatively, at z ~ 0.7, the entire growth rate could be explained by fast-quenching PSB galaxies, with a visibility time-scale of 0.5 Gyr. At lower redshift, the number density of PSBs is so low that an unphysically short visibility window would be required for them to contribute significantly to the quiescent population growth. The importance of the fast-quenching route may rapidly diminish at z 10 11 M ⊙ ), there is tension between the large number of candidate transition galaxies compared to the slow growth of the quiescent population. This could be resolved if not all high-mass PSB and green-valley galaxies are transitioning from star forming to quiescent, for example if they rejuvenate out of the quiescent population following the accretion of gas and triggering of star formation, or if they fail to completely quench their star formation

The Importance of Local and Global Social Ties for the Mental Health and Well-Being of Recently Resettled Refugee-Background Women in Australia

Social connections are foundational to the human condition and are inherently disrupted when people are forcibly displaced from their home countries. At a time of record high global forced migration, there is value in better understanding how refugee-background individuals engage theirsocial supports or ties in resettlement contexts. A mixed methods research design aimed to understand the complexities of how 104 refugee-background women experienced their social networks in the first few months of resettlement in Australia. One of the research activities involved participants completing a survey with both quantitative and qualitative components. The quantitative analyses identified the impact of post-migration living difficulties that represented social stressors (worry about family, loneliness and boredom, feeling isolated, and racial discrimination) on the women’s mental health outcomes in the months following resettlement. The qualitative data highlighted the complexities of social relationships serving as both stressors and sources of support, and the importance of recognizing extended families and supports around the globe. The findings point to the need for nuanced accounts of the social contexts surrounding refugee resettlement as important influences able to promote trauma-informed and gender sensitive practices to support mental health and well-being in new settings

Post‐Impact Evolution of the Southern Hale Crater Ejecta; Mars

As one of the youngest large (> 100 km wide) impacts on Mars, Hale crater offers a unique opportunity to observe well‐preserved deposits of Mars’ former interior. We utilize visible imagery (CTX and HiRISE) and elevation data (MOLA, HRSC and HiRISE stereo pairs) to examine the region south of Hale crater, which contains the greatest density of landforms caused by with the impact. Linear depressions, mounds, and polygons indicate that the ejecta material contained volatiles and underwent substantial post–impact geomorphic evolution after it was emplaced. Ejecta landform formation was facilitated by volatiles, likely water ice displaced from the subsurface during the impact, contained within the material. We suggest that the ejecta flowed into valleys where it acted in a manner similar to terrestrial debris flows, leaving mounds, high‐standing deposits, lobate flow margins and fan structures. Continued flow and settling of the ejecta then caused deposit dewatering, producing networks of linear depressions, particularly in places where the flows of ejecta were constricted. However, these landforms are not present everywhere, and their formation was likely influenced by topography. This work highlights that, while volatiles were present over much of Hale crater’s ejecta blanket, the surface expression of them is spatially variable on local and regional scales

Galaxy And Mass Assembly (GAMA): a deeper view of the mass, metallicity and SFR relationships

A full appreciation of the role played by gas metallicity (Z), star formation rate (SFR) and stellar mass (M*) is fundamental to understanding how galaxies form and evolve. The connections between these three parameters at different redshifts significantly affect galaxy evolution, and thus provide important constraints for galaxy evolution models. Using data from the Sloan Digital Sky Survey–Data Release 7 (SDSS–DR7) and the Galaxy and Mass Assembly (GAMA) surveys, we study the relationships and dependences between SFR, Z and M*, as well as the Fundamental Plane for star-forming galaxies. We combine both surveys using volume-limited samples up to a redshift of z ≈ 0.36. The GAMA and SDSS surveys complement each other when analysing the relationships between SFR, M* and Z. We present evidence for SFR and metallicity evolution to z ∼ 0.2. We study the dependences between SFR, M*, Z and specific SFR (SSFR) on the M*–Z, M*–SFR, M*–SSFR, Z–SFR and Z–SSFR relations, finding strong correlations between all. Based on those dependences, we propose a simple model that allows us to explain the different behaviour observed between low- and high-mass galaxies. Finally, our analysis allows us to confirm the existence of a Fundamental Plane, for which M* = f(Z, SFR) in star-forming galaxies