Punishment and Welfare: Paternal Incarceration and Families’ Receipt of Public Assistance

The US criminal justice and welfare systems together form important government interventions into the lives of the poor. This paper considers how imprisonment is related to welfare receipt for offenders and their families. Using longitudinal data from the Fragile Families and Child Wellbeing study, it investigates how recent paternal incarceration is associated with families' receipt of TANF, food stamps, and Medicaid/SCHIP. Results robust to multiple tests find that incarceration does not increase the likelihood of TANF receipt but significantly increases food stamps and Medicaid/SCHIP receipt. Further, the effect of incarceration on welfare receipt is larger than the recent loss of father's employment. The findings suggest that an unexpected consequence of mass imprisonment is the expansion of government regulation through welfare provision for offender's families.Fragile Families and Child Wellbeing study, imprisonment, welfare, criminal justice, welfare system, food stamps, Medicaid/SCHIP, incarceration

Daytime Locations in Spatial Mismatch: Job Accessibility and Employment at Reentry From Prison.

Individuals recently released from prison confront many barriers to employment. One potential obstacle is spatial mismatch-the concentration of low-skilled, nonwhite job-seekers within central cities and the prevalence of relevant job opportunities in outlying areas. Prior research has found mixed results about the importance of residential place for reentry outcomes. In this article, we propose that residential location matters for finding work, but this largely static measure does not capture the range of geographic contexts that individuals inhabit throughout the day. We combine novel, real-time GPS information on daytime locations and self-reported employment collected from smartphones with sophisticated measures of job accessibility to test the relative importance of spatial mismatch based on residence and daytime locations. Our findings suggest that the ability of low-skilled, poor, and urban individuals to compensate for their residential deficits by traveling to job-rich areas is an overlooked and salient consideration in spatial mismatch perspectives

Micro-meteoroid seismic uplift and regolith concentration on kilometric scale asteroids

Seismic shaking is an attractive mechanism to explain the destabilisation of regolith slopes and the regolith migration found on the surfaces of asteroids (Richardson et al. 2004; Miyamoto et al. 2007). Here, we use a continuum mechanics method to simulate the seismic wave propagation in an asteroid. Assuming that asteroids can be described by a cohesive core surrounded by a thin non-cohesive regolith layer, our numerical simulations of vibrations induced by micro-meteoroids suggest that the surface peak ground accelerations induced by micro-meteoroid impacts may have been previously under-estimated. Our lower bound estimate of vertical accelerations induced by seismic waves is about 50 times larger than previous estimates. It suggests that impact events triggering seismic activity are more frequent than previously assumed for asteroids in the kilometric and sub-kilometric size range. The regolith lofting is also estimated by a first order ballistic approximation. Vertical displacements are small, but lofting times are long compared to the duration of the seismic signals. The regolith movement has a non-linear dependence on the distance to the impact source which is induced by the type of seismic wave generating the first movement. The implications of regolith concentration in lows of surface acceleration potential are also discussed. We suggest that the resulting surface thermal inertia variations of small fast rotators may induce an increased sensitivity of these objects to the Yarkovsky effect.Comment: Accepted for publication in Icaru

Freely Scalable Quantum Technologies using Cells of 5-to-50 Qubits with Very Lossy and Noisy Photonic Links

Exquisite quantum control has now been achieved in small ion traps, in nitrogen-vacancy centres and in superconducting qubit clusters. We can regard such a system as a universal cell with diverse technological uses from communication to large-scale computing, provided that the cell is able to network with others and overcome any noise in the interlinks. Here we show that loss-tolerant entanglement purification makes quantum computing feasible with the noisy and lossy links that are realistic today: With a modestly complex cell design, and using a surface code protocol with a network noise threshold of 13.3%, we find that interlinks which attempt entanglement at a rate of 2MHz but suffer 98% photon loss can result in kilohertz computer clock speeds (i.e. rate of high fidelity stabilizer measurements). Improved links would dramatically increase the clock speed. Our simulations employed local gates of a fidelity already achieved in ion trap devices.Comment: corrected typos, additional references, additional figur

Early stages of phase selection in MOF formation observed in molecular Monte Carlo simulations

Metal-organic frameworks (MOF) comprising metal nodes bridged by organic linkers show great promise because of their guest-specific gas sorption, separation, drug-delivery, and catalytic properties. The selection of metal node, organic linker, and synthesis conditions in principle offers engineered control over both structure and function. For MOFs to realise their potential and to become more than just promising materials, a degree of predictability in the synthesis and a better understanding of the self-assembly or initial growth processes is of paramount importance. Using cobalt succinate, a MOF that exhibits a variety of phases depending on synthesis temperature and ligand to metal ratio, as proof of concept, we present a molecular Monte Carlo approach that allows us to simulate the early stage of MOF assembly. We introduce a new Contact Cluster Monte Carlo (CCMC) algorithm which uses a system of overlapping "virtual sites" to represent the coordination environment of the cobalt and both metal-metal and metal-ligand associations. Our simulations capture the experimentally observed synthesis phase distinction in cobalt succinate at 348 K. To the best of our knowledge this is the first case in which the formation of different MOF phases as a function of composition is captured by unbiased molecular simulations. The CCMC algorithm is equally applicable to any system in which short-range attractive interactions are a dominant feature, including hydrogen-bonding networks, metal-ligand coordination networks, or the assembly of particles with "sticky" patches, such as colloidal systems or the formation of protein complexes.</p

Review of Plants and Humans in the Near East and the Caucasus: Ancient and Traditional Uses of Plants as Food and Medicine, a Diachronic Ethnobotanical Review (2 vols)

Review of Plants and Humans in the Near East and the Caucasus: Ancient and Traditional Uses of Plants as Food and Medicine, a Diachronic Ethnobotanical Review (2 vols). Vol. 1: The Landscapes. The Plants: Ferns and Gymnosperms. Vol. 2: The Plants: Angiosperms. Diego Rivera Núñez, Gonzalo Matilla Séiquer, Concepción Obón, Francisco Alcaraz Ariza. 2011. Ediciones de la Unverisdad de Murcia. Pp. 1056. EUR 23.76 (paperback). ISBN 978-84-15463-07-08 (2 vols.), 978-84-15463-05-4 (vol. 1), 978-84-15463-06-1 (vol. 2)

Symbols of Fertility and Abundance in the Royal Cemetery at Ur, Iraq

Fertility and abundance are important themes of ancient Mesopotamian texts and images. The goddess Inanna and her consort Dumuzi personify these ideas in texts of the second millennium B.C.E. Excavated by Leonard Woolley in the 1920s, the Royal Cemetery at Ur dates to the mid third millennium B.C.E. Among the tombs, that of Queen Puabi yielded many ornaments of gold, carnelian, and lapis. Some of the pendants realistically depict identifiable animals. Others are more stylized depictions of clusters of apples, dates, and date inflorescences. Apples and dates are both associated with the goddess Inanna, who is associated with love and fertility. Twisted wire pendants in the same group of objects are not so readily identified. I propose here that the twisted wire pendants in the Puabi assemblage may literally represent rope, symbolically reference sheep, and narratively evoke the flocks of the shepherd Dumuzi. Pairing symbols of Inanna and Dumuzi evokes life in a place of death