Cultural districts have attracted increased attention as an urban economic development strategy. Yet for the most part, cities have focused on the agglomeration of cultural assets to increase tourism or lure wary suburbanites downtown. This article examines an alternative use of the arts for community development: cultivating neighborhood cultural clusters with modest concentrations of cultural providers (both nonprofit and commercial), resident artists, and cultural participants. The article presents innovative methods for integrating data on these indicators into a geographic information system to produce a Cultural Asset Index that can be used to identify census block groups with the highest density of these assets. The article then demonstrates the association between the concentration of cultural assets in Philadelphia in 1997 with improved housing market conditions between 2001 and 2006. The article concludes by exploring the implications of a neighborhood-based creative economy for urban policy, planning, and research.

We show that ultrafast electron diffuse (inelastic) scattering provides a detailed, momentum-resolved view of electron-phonon and phonon-phonon coupling across the entire Brillouin zone. Ultrafast time-resolution and scattering selection rules can distinguish between phonon branches without energyresolution.

Planning, problem solving, and inhibitory abilities are significantly affected by alcohol abuse, with decisional and cognitive forms of impulsivity most impacted. Cognitive remediation targeting these deficits might increase the related functions that mediate the ability to moderate or abstain from alcohol, and so lead to improved treatment results.

These findings indicate that cocaine and methamphetamine dependence are significantly and differentially associated with gray matter abnormalities. Results also point to possible gray matter recovery after abstinence from methamphetamine. Although the sample size was adequate, these findings should be considered preliminary and analyses should be revisited with additional primary research focusing on long or short-term duration of use, as well as the length of abstinence.

Background Management of fecal incontinence is a priority in acute and critical care to reduce risk of perineal dermatitis and transmission of nosocomial infections. Objective To evaluate the safety of the Flexi-Seal Fecal Management System in hospitalized patients with diarrhea and incontinence. Methods A prospective, single-arm clinical study with 42 patients from 7 hospitals in the United States was performed. The fecal management system could be used for up to 29 days. The first 11 patients (all from critical care) underwent endoscopic proctoscopy at baseline; 8 of these had endoscopy again after treatment. The remaining 31 patients (from critical or acute care) did not have endoscopy. Results Rectal mucosa was healthy after use of the device in all patients who had baseline and follow-up endoscopy. Physicians and nurses reported that the system was easy to insert, remove, and dispose of; its use improved management of fecal incontinence; and it was practical, caregiver- and patient-friendly, time-efficient, and efficacious. Skin condition improved or was maintained in more than 92% of patients. Patients’ reports of discomfort, pain, burning, or irritation were uncommon. Adverse events were reported for 11 patients (26%). Death (considered unrelated to study treatment) occurred in 5 patients, 2 patients had generalized skin breakdown, and 1 patient had gastrointestinal bleeding after 4 days of treatment. Conclusions The fecal management system can be used safely in hospitalized patients with diarrhea and fecal incontinence. Additional well-designed, controlled clinical trials may help to measure clinical and economic outcomes associated with the device.

Interactions between the lattice and charge carriers can drive the formation of phases and ordering phenomena that give rise to conventional superconductivity, insulator-to-metal transitions, and charge-density waves. These couplings also play a determining role in properties that include electric and thermal conductivity. Ultrafast electron diffuse scattering (UEDS) has recently become a viable laboratory-scale tool to track energy flow into and within the lattice system across the entire Brillouin zone, and to deconvolve interactions in the time domain. Here, we present a detailed quantitative framework for the interpretation of UEDS signals, ultimately extracting the phonon mode occupancies across the entire Brillouin zone. These transient populations are then used to extract momentum-and mode-dependent electron-phonon and phonon-phonon coupling constants. Results of this analysis are presented for graphite, which provides complete information on the phonon-branch occupations and a determination of the A 1 phonon mode-projected electronphonon coupling strength g 2 e,A 1 = 0.035 ± 0.001 eV 2 that is in agreement with other measurement techniques and simulations.

Crystallization of amorphous germanium (a-Ge) by laser or electron beam heating is a remarkably complex process that involves several distinct modes of crystal growth and the development of intricate microstructural patterns on the nanosecond to ten microsecond timescales. Here we use dynamic transmission electron microscopy (DTEM) to study the fast, complex crystallization dynamics with 10 nm spatial and 15 ns temporal resolution. We have obtained time-resolved real-space images of nanosecond laser-induced crystallization in a-Ge with unprecedentedly high spatial resolution. Direct visualisation of the crystallization front allows for time-resolved snapshots of the initiation and roughening of the dendrites on sub-microsecond timescales. This growth is followed by a rapid transition to a ledge-like growth mechanism that produces a layered microstructure on a timescale of several microseconds. This study provides new insights into the mechanisms governing this complex crystallization process and is a dramatic demonstration of the power of DTEM for studying time-dependent material processes far from equilibrium.

We demonstrate the compression of electron pulses in a high-brightness ultrafast electron diffraction instrument using phase-locked microwave signals directly generated from a mode-locked femtosecond oscillator. Additionally, a continuous-wave phase stabilization system that accurately corrects for phase fluctuations arising in the compression cavity from both power amplification and thermal drift induced detuning was designed and implemented. An improvement in the microwave timing stability from 100 fs to 5 fs RMS is measured electronically, and the long-term arrival time stability (>10 h) of the electron pulses improves to below our measurement resolution of 50 fs. These results demonstrate sub-relativistic ultrafast electron diffraction with compressed pulses that is no longer limited by laser-microwave synchronization.