Correlations of perceived post-editing effort with measurements of actual effort

Human rating of predicted post-editing effort is a common activity and has been used to train confidence estimation models. However, the correlation between human ratings and actual post-editing effort is under-measured. Moreover, the impact of presenting effort indicators in a post-editing user interface on actual post-editing effort has hardly been researched. In this study, ratings of perceived post-editing effort are tested for correlations with actual temporal, technical and cognitive post-editing effort. In addition, the impact on post-editing effort of the presentation of post-editing effort indicators in the user interface is also tested. The language pair involved in this study is English-Brazilian Portuguese. Our findings, based on a small sample, suggest that there is little agreement between raters for predicted post-editing effort and that the correlations between actual post-editing effort and predicted effort are only moderate, and thus an inefficient basis for MT confidence estimation. Moreover, the presentation of post-editing effort indicators in the user interface appears not to impact on actual post-editing effort.     

Methodologies for Measuring the Correlations between Post-Editing Effort and Machine Translatability

Against the background of a wider research project that aims to investigate the correlation, if any, between post-editing effort and the presence of negative translatability indicators in source texts submitted to Machine Translation (MT), this paper sets out to assess the potential of two methods for measuring the effort involved in post-editing MT output. The first is based on the use of the keyboard-monitoring program Translog; the second on Choice Network Analysis (CNA). The paper reviews relevant research in both machine translatability and MT post-editing, and appraises, in particular, the suitability of think-aloud protocols in assessing post-editing effort. The combined use of Translog and CNA is proposed as a way of overcoming some of the difficulties presented by the use of think-aloud protocols in the current context. Initial results from a study conducted at Dublin City University confirm that triangulating data from Translog and CNA can cast light on the temporal, cognitive and technical aspects of post-editing effort.     

Evaluation of a comprehensive slip, trip and fall prevention programme for hospital employees

In 2007, the Bureau of Labor Statistics reported that the incidence rate of lost workday injuries from slips, trips and falls (STFs) on the same level in hospitals was 35.2 per 10,000 full-time equivalents (FTE), which was 75% greater than the average rate for all other private industries combined (20.2 per 10,000 FTEs). The objectives of this 10-year (1996-2005) longitudinal study were to: 1) describe occupational STF injury events in hospitals; 2) evaluate the effectiveness of a comprehensive programme for reducing STF incidents among hospital employees. The comprehensive prevention programme included analysis of injury records to identify common causes of STFs, on-site hazard assessments, changes to housekeeping procedures and products, introduction of STF preventive products and procedures, general awareness campaigns, programmes for external ice and snow removal, flooring changes and slip-resistant footwear for certain employee subgroups. The hospitals' total STF workers' compensation claims rate declined by 58% from the pre-intervention (1996-1999) rate of 1.66 claims per 100 FTE to the post-intervention (2003-2005) time period rate of 0.76 claims per 100 FTE (adjusted rate ratio = 0.42, 95% CI: 0.33-0.54). STFs due to liquid contamination (water, fluid, slippery, greasy and slick spots) were the most common cause (24%) of STF claims for the entire study period 1996-2005. Food services, transport/emergency medical service and housekeeping staff were at highest risk of a STF claim in the hospital environment. Nursing and office administrative staff generated the largest numbers of STF claims. STF injury events in hospitals have a myriad of causes and the work conditions in hospitals are diverse. This research provides evidence that implementation of a broad-scale prevention programme can significantly reduce STF injury claims.     

Rigid body constraints realized in massively-parallel molecular dynamics on graphics processing units

Molecular dynamics (MD) methods compute the trajectory of a system of point particles in response to a potential function by numerically integrating Newton?s equations of motion. Extending these basic methods with rigid body constraints enables composite particles with complex shapes such as anisotropic nanoparticles, grains, molecules, and rigid proteins to be modeled. Rigid body constraints are added to the GPU-accelerated MD package, HOOMD-blue, version 0.10.0. The software can now simulate systems of particles, rigid bodies, or mixed systems in microcanonical (NVE), canonical (NVT), and isothermal-isobaric (NPT) ensembles. It can also apply the FIRE energy minimization technique to these systems. In this paper, we detail the massively parallel scheme that implements these algorithms and discuss how our design is tuned for the maximum possible performance. Two different case studies are included to demonstrate the performance attained, patchy spheres and tethered nanorods. In typical cases, HOOMD-blue on a single GTX 480 executes 2.5–3.6 times faster than LAMMPS executing the same simulation on any number of CPU cores in parallel. Simulations with rigid bodies may now be run with larger systems and for longer time scales on a single workstation than was previously even possible on large clusters.     

Advances in local student modeling using informal fuzzy reasoning

This paper presents an approach to local student modeling in mathematics intelligent tutors. A knowledge representation is developed that stores separately the semantic and structural information needed to represent math word problems. Based on this representation, and the assignment of weights to semantic labels for problem sets, the student is allowed considerable flexibility in the development of solutions. The technique used in matching student solutions to acceptable solutions is based on imprecision or fuzziness, i.e. exact matches to stored solutions are not required. Moreover, this imprecise approach, together with a “collapsing” of the tree of all possible solutions, substantially reduces storage and search requirements, addressing some combinatorial explosion and speed problems of modeling. This method can support a variety of instructional strategies.     

Normalization and deinstitutionalization of mentally retarded individuals: Controversy and facts.

Examines the sources of the controversy over normalization to clarify the limits of knowledge about treatment and suggests the possibility of theory-based evaluation of service delivery. Social reform in the treatment of mental retardation from 1967 to 1985 is reviewed, and the role of social science in policy formation and evaluation is discussed. Relevant research over the last 3 decades is summarized, and ways in which psychologists could have a positive impact on policy and services are suggested. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Premenstrual and menstrual mood changes in adolescent women.

Studied the presence and magnitude of menstrual-cycle-related mood changes using standardized measures of depression and anxiety. 158 females aged 15–16 yrs completed the Menstrual Distress Questionnaire and reported the actual date of onset of their next 2 menstrual periods. These Ss and their male classmates were later given the Depression Adjective Check List, Forms A and D, and the State-Trait Anxiety Inventory twice, 2 wks apart, in an unrelated classroom setting. This study assessed the magnitude of anxiety and depression experienced by the 29 Ss who were tested within 4 days preceding the onset of menstruation and the 23 Ss who were tested during the first 4 days of menstruation. Premenstrual and menstrual test scores were compared with those obtained during the intermenstrual phase of the cycle. No significant differences in mood attributable to cycle phase were found. A control group of males also showed no significant difference in mood. Adolescent women appear to be different from women over 30 who have been reported to show significantly increased state anxiety and depression during the premenstrual phase of the menstrual cycle. (22 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Describing the crime victim: Psychological reactions to victimization.

There is now a growing research literature on the types of reactions that are experienced by crime victims of all types. We review research on systematic differences in such reactions over time. Such reactions often seem more severe than might be expected on the basis of the material loss or physical injury caused by the victimization. Theories developed to explain the stress resulting from being a crime victim are outlined. They include a loss of a sense of self, a loss of safety or invulnerability, and feelings of inequity or injustice. Also reviewed are the cognitive and behavioral coping responses of victims. Redefining the victimization experience as less severe than it originally seemed or as occurring for some other purpose is one common coping mechanism. Another is to blame oneself as a means of reestablishing control over the situation. Behavioral coping through withdrawal or through assertive action and help seeking is also discussed. Some of the special issues associated with family violence and with children who are victimized, as well as another special type of victim, the friend or relative of someone else who has been killed or seriously injured, are discussed. Needs for future research are outlined. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Lithium?Oxygen Electrochemistry in Non-Aqueous Solutions

Pairing lithium and oxygen in aprotic solvents can theoretically lead to one of the most promising electrochemical cells available. If successful, this system could compete with technologies such as the internal combustion engine and provide an energy density that can accommodate electric vehicle demands. However, there are many problems that have inhibited this technology from becoming realistic. One of the main reasons is capacity fading after only a few cycles, which is caused by the instability of electrolyte solutions in the presence of reduced oxygen species like O₂^.− and O₂²⁻. In recent years, using various analytical tools, researchers have been able to isolate the breakdown products arising from the reactions occurring between the aprotic solvent and the reduced oxygen species. Nevertheless, no solvents have yet been found that are fully stable throughout the reduction and oxidation processes. However, an understanding of these decomposition mechanisms can help us in designing new systems that are more stable toward the aggressive conditions taking place in Li O₂ cell operation. This review will include analytical studies on the most widely used solvents in current Li O₂ research.