Revealing Missing Bug-Fixes in Code Clones in Large-Scale Code Bases

When a bug is fixed in duplicated code, it is often necessary to modify all duplicates (so-called clones) accordingly.In practice, however, fixes are often incomplete, which causes the bug to remain in one or more of the clones.This paper presents an approach that detects such incomplete bug-fixes in cloned code by analyzing a system's version history to reveal those commits that fix problems.The approach then performs incremental clone detection to reveal those clones that became inconsistent as a result of such a fix.We present results from a case study that analyzed incomplete bug-fixes in six industrial and open-source systems to demonstrate the feasibility and defectiveness of our approach.We identified likely incomplete bug-fixes in all analyzed systems

Assessment Strategies for Technical Services (Presentation)

This presentation describes a number of qualitative assessment practices that can help technical services managers assess their effectiveness. Strategies include process improvement initiatives, customer service surveys, focus groups, benchmarking, and more

Internal Customer Service Assessment of Cataloging, Acquisitions, and Library Systems [Presentation]

The Technical Services and Library Systems Division of the University at Albany Libraries conducted an internal customer service survey to gauge customer satisfaction with its services. Survey results demonstrated that customer surveys are a valuable assessment tool. Technical services and library systems units should use this tool to identify whether customers are satisfied with the services provided, whether the services are still needed, whether additional services are needed, and more. This presentation provides an approach to conducting a customer service survey, an analysis of potential benefits, and a survey instrument that others could adapt to use in their own libraries

Metal-Doped Plastic Scintillator for Neutron Detection

The Super Cryogenic Dark Matter Search (SuperCDMS) is an experiment that looks for dark matter, specifically weakly-interacting massive particles (WIMPs) via nuclear recoils with germanium and silicon atoms. Currently, the SuperCDMS SNOLAB dark matter detector, the successor to SuperCDMS Soudan, is being developed for placement at the SNOLAB research facility in Canada. As the sensitivity of this detector is increased, the suppression of neutron backgrounds through the traditional methods of using highly radiopure materials and passive shielding becomes much more difficult. Single-scatter neutron events can produce nuclear recoils that are indistinguishable from WIMP interactions. These events can be detected by replacing some of the passive neutron shielding with an active neutron veto composed of a metal-loaded plastic scintillator.This research was supported by the Undergraduate Research Opportunities Program (UROP)

Postnatal Depressive Symptoms Among Mothers and Fathers of Infants Born Preterm: Prevalence and Impacts on Children's Early Cognitive Function

OBJECTIVE: Preterm birth is associated with lower cognitive functioning. One potential pathway is postnatal parental depression. The authors assessed depressive symptoms in mothers and fathers after preterm birth, and identified the impacts of both prematurity and parental depressive symptoms on children's early cognitive function. METHOD: Data were from the nationally representative Early Childhood Longitudinal Study, Birth Cohort (n = 5350). Depressive symptoms at 9 months were assessed by the Center for Epidemiologic Studies Depression Scale (CESD) and children's cognitive function at 24 months by the Bayley Short Form, Research Edition. Weighted generalized estimating equation models examined the extent to which preterm birth, and mothers' and fathers' postnatal depressive symptoms impacted children's cognitive function at 24 months, and whether the association between preterm birth and 24-month cognitive function was mediated by parental depressive symptoms. RESULTS: At 9 months, fathers of very preterm (<32 weeks gestation) and moderate/late preterm (32-37 weeks gestation) infants had higher CESD scores than fathers of term-born (≥37 weeks gestation) infants (p value = .02); preterm birth was not associated with maternal depressive symptoms. In multivariable analyses, preterm birth was associated with lower cognitive function at 24 months; this association was unaffected by adjustment for parental depressive symptoms. Fathers', but not mothers', postnatal depressive symptoms predicted lower cognitive function in the fully adjusted model (β = -0.11, 95% confidence interval, -0.18 to -0.03). CONCLUSION: Fathers of preterm infants have more postnatal depressive symptomology than fathers of term-born infants. Fathers' depressive symptoms also negatively impact children's early cognitive function. The national findings support early identification and treatment of fathers of preterm infants with depressive symptoms