T. G. W. POWELL. The Celts. (Ancient Peoples and Places Series, No. 6.) Pp. 282. New York: Frederick A. Praeger, 1958. $5.00

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67306/2/10.1177_000271625932100142.pd

J. F. C. FULLER. A Military History of the Western World: From the Earliest Times to the Battle of Lepanto. Pp. xiii, 602. New York: Funk and Wagnalls Company, 1954. $6.00

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67265/2/10.1177_000271625529900127.pd

A. H. M. JONES. Studies in Roman Gov ernment and Law. Pp. viii, 243. New York: Frederick A. Praeger, 1960. $6.00

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/66550/2/10.1177_000271626133600143.pd

RICHARD MANSFIELD HAYWOOD. The Myth of Rome's Fall. Pp. 178. New York: Thomas Y. Crowell Company, 1958. $3.50

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67051/2/10.1177_000271625932300141.pd

The road from above: remotely sensed discovery of early modern travel infrastructure in Afghanistan

Caravanserais or ‘road inns’ were a central aspect of medieval and early modern sociality in Central Asia, as infrastructural investments made by centralized polities to promote long distance exchange, and as locales for providing charitable hospitality. This paper presents data on early modern (16-17th c) caravan networks in Afghanistan, discovered and mapped using satellite imagery and historical data by the Afghan Heritage Mapping Partnership (AHMP) at the University of Chicago. By recording networks of standardized roadside architecture from the Safavid-Mughal period, we generate new information on previously understudied routes of the early modern “Silk Roads.

Cerebral blood flow predicts differential neurotransmitter activity

Application of metabolic magnetic resonance imaging measures such as cerebral blood flow in translational medicine is limited by the unknown link of observed alterations to specific neurophysiological processes. In particular, the sensitivity of cerebral blood flow to activity changes in specific neurotransmitter systems remains unclear. We address this question by probing cerebral blood flow in healthy volunteers using seven established drugs with known dopaminergic, serotonergic, glutamatergic and GABAergic mechanisms of action. We use a novel framework aimed at disentangling the observed effects to contribution from underlying neurotransmitter systems. We find for all evaluated compounds a reliable spatial link of respective cerebral blood flow changes with underlying neurotransmitter receptor densities corresponding to their primary mechanisms of action. The strength of these associations with receptor density is mediated by respective drug affinities. These findings suggest that cerebral blood flow is a sensitive brain-wide in-vivo assay of metabolic demands across a variety of neurotransmitter systems in humans

The prevalence and correlates of texting while driving among a population-based sample of Ontario students

Objective: Texting while driving (TWD) has a deleterious impact on driving performance and may pose a significant challenge to traffic safety. This challenge may be particularly relevant for young and inexperienced drivers. This study examined the prevalence and risk factors of writing text messages or emails while driving during the past 12 months. Method: This study analyzed a subpopulation of 1,133 licensed students 16 years of age or older from the 2013 Ontario Student Drug Use Survey (OSDUHS), a population-based survey of students in Ontario, Canada. Results: Our results indicate that 36% of licensed drivers reported writing a text message while driving during the past 12 months; of those who did, 56% reported doing so 4 or more times. Graduated licensing was the strongest factor predicting TWD. Compared to students with the more restrictive G1 license, students with a G2 or full license were 9.4 times more likely to report TWD after controlling for the effect of all other factors. Older students, white students, and students attending school in urban centers were more likely to report TWD, and the amount of time spent on social media sites, being a passenger with a driver using substances, and past-year collisions were also significantly associated with TWD. Gender differences and participation in driver education training were not associated with TWD. Conclusions: This research demonstrates that TWD is an extremely common behavior among licensed student drivers in Ontario, particularly among those who have passed the first stage of graduated licensing. TWD is associated with other risky driving behaviors and outcomes, and the findings from this study underscore the need to better understand the harms associated with this behavior

Morphological cells in the Ragusa littoral (Sicily, Italy)

Geomorphologic information, topographic maps (dated 1967), aerial photographs (dated 1999 and 2008), and spatial analysis procedures were used to investigate a 90 km long coastal sector in South Sicily (Italy). Information was obtained on coastal erosion/accretion areas, general sediment circulation pattern and littoral cell distribution. Human-made structures and natural headlands constituted important artificial limits dividing littoral in morphological cells. Ports and harbours were observed at Scoglitti, Punta Secca, Marina di Ragusa, Donnalucata and Pozzallo. Most of them worked as “transit” limits which interrupted predominant, eastward directed sedimentary transport, this way generating accretion in updrift (west) side of mentioned structures and erosion in downdrift (east) side. During the 1967–2008 period, about 62,000 m2 and 42,000 m2 of beach surface were respectively formed updrift of Scoglitti and Donnalucata ports. The construction of Pozzallo port gave rise to the formation of a “convergent” limit which favoured large accretion (94,000 m2) east of port structure. Most important natural structures were observed at Punta Zafaglione, P. Braccetto and Cava d’Aliga. The knowledge of littoral cell distribution acquires a great importance for appropriate management of coastal erosion processes which may be mitigated installing by-passing systems in ports and harbours and carrying out nourishment works in eroding areas, often located downdrift of ports and harbours (when these structures work as transit limits) and in central part of littoral cells (when these structures work as convergent limits)

Bad Practice in Erosion Management: The Southern Sicily Case Study

This case study from Sicily illustrates a common sequence of events where one unwise action was countered with another, which in turn created additional problems. The situation arose through strong political interference and ignorance (or lack of concern) regarding the environmental impacts of human interventions on the shoreline and by the public perception that government has a duty to protect private property. The poor design and location of ports and harbours produced infilling problems and huge updrift accretion with concomitant downdrift erosion. The human-induced coastal retreat was counteracted by the progressive emplacement of breakwaters creating a “domino” effect. On many occasions these were constructed to protect unplanned and illegal (in the sense that they do not conform to planning regulations) beachfront summer houses. Without the presence of these structures, there would have been no need for publicly funded intervention. Furthermore, only a narrow coastal belt close to the shoreline is used by bathers on the wide beaches formed updrift of ports and harbours and in the lee of breakwaters, most of the accreted beach being unused or partially occupied by tourist developments. Thus beach users and municipalities acquired some benefits from beach accretion at specific sites, the opposite being true in eroding areas