Local governments are creating 311 public service request lines across the US, and the publicly-available data from these lines is continuously-measured, geographically finegrained, and a non-self-reported measure of citizens’ behavior. As such, it seems a promising measure of neighborhood civic engagement. However, this data is both empirically and theoretically different from many common citi...

We have studied the efficacy of (NH4)2Sx surface passivation on the (311)A GaAs surface. We report XPS studies of simultaneously-grown (311)A and (100) heterostructures showing that the (NH4)2Sx solution removes surface oxide and sulfidizes both surfaces. Passivation is often characterized using photoluminescence measurements; we show that while (NH4)2Sx treatment gives a 40-60 ×  increase in p...

Quantum chemistry calculations have been performed to compute the optimized geometries, vibrational frequencies, and Mulliken Charges at B3LYP/6-31G(d) and B3LYP/6-311++G(d,p) levels for 3-(4-fluorophenyl)thiophene (FPT), 3-(4-nitrophenyl)thiophene (NPT) and 3-(4-cyanophenyl) thiophene (CPT) in the ground state. In addition, the (13)C and (1)H NMR are calculated by B3LYP/6-311++G(d,p) and B3LYP...

The key roles of iron and iron proteins in cell proliferation make them potential targets for cancer therapy. However, clinical trials directed toward perturbation of tumor iron homeostasis by iron chelation have been limited to the use of deferoxamine (DFO). There is thus a need to develop agents with greater efficacy. In the present study, we investigated the mechanism of cytotoxicity of 311 ...

A 311 system provides quick and easy access to non-emergency municipal services and information through a consolidated channel. This study explores the operation of 311 contact centers in New York and Philadelphia and identifies critical success factors and challenges of 311-driven service integration. Analyzing the qualitative data from semi-structured interviews with 311 center staff and city...

Objective: To pilot-test a school mental health program for Latino immigrant students who have been exposed to community violence. Method: In this quasi-experimental study conducted from January through June 2000, 198 students in third through eighth grade with trauma-related depression and/or posttraumatic stress disorder symptoms were compared after receiving an intervention or being on a wai...

Seymour has shown recently that people take less time to judge that the word above correctly describes the spatial position of a small circle drawn ABOVE a large reference square than they do for the word below and the circle BELOW the square. Seymour has attributed this asymmetry to the tendency for people to invariably scan a picture from top to bottom. In the present study, the first experim...