bluuebunny/crossref_metadata_2025_split huggingface dataset:
Impact of Aligning Climatological Day on Gridding Daily Maximum–Minimum Temperature and Precipitation over Canada
Authors: Hopkinson Ron F. , McKenney Daniel W. , Milewska Ewa J. , Hutchinson Michael F. , Papadopol Pia , Vincent Lucie A. 
Published: March 2011

AbstractOn 1 July 1961, the climatological day was redefined to end at 0600 UTC at all principal climate stations in Canada. Prior to that, the climatological day at principal stations ended at 1200 UTC for maximum temperature and precipitation and 0000 UTC for minimum temperature and was similar to the climatological day at ordinary stations. Hutchinson et al. reported occasional larger-than-expected residuals at 50 withheld stations when the Australian National University Spline (ANUSPLIN) interpolation scheme was applied to daily data for 1961–2003, and it was suggested that these larger residuals were in part due to the existence of different climatological days. In this study, daily minimum and maximum temperatures at principal stations were estimated using hourly temperatures for the same climatological day as local ordinary climate stations for the period 1953–2007. Daily precipitation was estimated at principal stations using synoptic precipitation data for the climatological day ending at 1200 UTC, which, for much of the country, was close to the time of the morning observation at ordinary climate stations. At withheld principal stations, the climatological-day adjustments led to the virtual elimination of large residuals in maximum and minimum temperature and a marked reduction in precipitation residuals. Across all 50 withheld stations the climatological day adjustments led to significant reductions, by around 12% for daily maximum temperature, 15% for daily minimum temperature, and 22% for precipitation, in the residuals reported by Hutchinson et al.
Explicitly Stochastic Parameterization of Nonorographic Gravity Wave Drag
Authors: Eckermann Stephen D. 
Published: March 2011

Abstract
A straightforward methodology is presented for converting the deterministic multiwave parameterizations of nonorographic gravity wave drag, currently used in general circulation models (GCMs), to stochastic analogs that use fewer waves (in the example herein, a single wave) within each grid box. Deterministic discretizations of source-level momentum flux spectra using a fixed spectrum of many waves with predefined phase speeds are replaced by sampling these source spectra stochastically using waves with randomly assigned phase speeds. Using simple conversion formulas, it is shown that time-mean wave-induced drag, diffusion, and heating-rate profiles identical to those from the deterministic scheme are produced by the stochastic analog. Furthermore, in these examples the need for bulk intermittency factors of small value is largely obviated through the explicit incorporation of stochastic intermittency into the scheme. When implemented in a GCM, the single-wave stochastic analog of an existing deterministic scheme reproduces almost identical time-mean middle-atmosphere climate and drag as its deterministic antecedent but with an order of magnitude reduction in computational expense. The stochastically parameterized drag is also accompanied by inherent variability about the time-mean profile that forces the smallest space–time scales of the GCM. Studies of mean GCM kinetic energy spectra show that this additional stochastic forcing does not lead to excessive increases in dynamical variability at these smallest GCM scales. The results show that the expensive deterministic schemes currently used in GCMs are easily modified and replaced by cheap stochastic analogs without any obvious deleterious impacts on GCM climate or variability, while offering potential advantages of computational savings, reduction of systematic climate biases, and greater and more realistic ensemble spread.
The Greenland Ice Sheet Response to Transient Climate Change
Authors: Ren Diandong , Fu Rong , Leslie Lance M. , Chen Jianli , Wilson Clark R. , Karoly David J. 
Published: March 2011

Abstract
This study applies a multiphase, multiple-rheology, scalable, and extensible geofluid model to the Greenland Ice Sheet (GrIS). The model is driven by monthly atmospheric forcing from global climate model simulations. Novel features of the model, referred to as the scalable and extensible geofluid modeling system (SEGMENT-Ice), include using the full Navier–Stokes equations to account for nonlocal dynamic balance and its influence on ice flow, and a granular sliding layer between the bottom ice layer and the lithosphere layer to provide a mechanism for possible large-scale surges in a warmer future climate (granular basal layer is for certain specific regions, though). Monthly climate of SEGMENT-Ice allows an investigation of detailed features such as seasonal melt area extent (SME) over Greenland. The model reproduced reasonably well the annual maximum SME and total ice mass lost rate when compared observations from the Special Sensing Microwave Imager (SSM/I) and Gravity Recovery and Climate Experiment (GRACE) over the past few decades.
The SEGMENT-Ice simulations are driven by projections from two relatively high-resolution climate models, the NCAR Community Climate System Model, version 3 (CCSM3) and the Model for Interdisciplinary Research on Climate 3.2, high-resolution version [MIROC3.2(hires)], under a realistic twenty-first-century greenhouse gas emission scenario. They suggest that the surface flow would be enhanced over the entire GrIS owing to a reduction of ice viscosity as the temperature increases, despite the small change in the ice surface topography over the interior of Greenland. With increased surface flow speed, strain heating induces more rapid heating in the ice at levels deeper than due to diffusion alone. Basal sliding, especially for granular sediments, provides an efficient mechanism for fast-glacier acceleration and enhanced mass loss. This mechanism, absent from other models, provides a rapid dynamic response to climate change. Net mass loss estimates from the new model should reach ~220 km3 yr−1 by 2100, significantly higher than estimates by the Intergovernmental Panel on Climate Change (IPCC) Assessment Report 4 (AR4) of ~50–100 km3 yr−1. By 2100, the perennial frozen surface area decreases up to ~60%, to ~7 × 105 km2, indicating a massive expansion of the ablation zone. Ice mass change patterns, particularly along the periphery, are very similar between the two climate models.
Lagrangian Drifter Dispersion in the Southwestern Atlantic Ocean
Authors: Berti Stefano , Santos Francisco Alves Dos , Lacorata Guglielmo , Vulpiani Angelo 
Published: March 2011

Abstract
In the framework of Monitoring by Ocean Drifters (MONDO) project, a set of Lagrangian drifters were released in proximity of the Brazil Current, the western branch of the subtropical gyre in the South Atlantic Ocean. The experimental strategy of deploying part of the buoys in clusters offers the opportunity to examine relative dispersion on a wide range of scales. Adopting a dynamical systems approach, the authors focus their attention on scale-dependent indicators, like the finite-scale Lyapunov exponent (FSLE) and the finite-scale (mean square) relative velocity (FSRV) between two drifters as a function of their separation and compare them with classic time-dependent statistical quantities like the mean-square relative displacement between two drifters and the effective diffusivity as functions of the time lag from the release. The authors find that, dependently on the given observable, the quasigeostrophic turbulence scenario is overall compatible with their data analysis, with discrepancies from the expected behavior of 2D turbulent trajectories likely to be ascribed to the nonstationary and nonhomogeneous characteristics of the flow, as well as to possible ageostrophic effects. Submesoscale features of ~O(1) km are considered to play a role, to some extent, in determining the properties of relative dispersion as well as the shape of the energy spectrum. The authors also present numerical simulations of an ocean general circulation model (OGCM) of the South Atlantic and discuss the comparison between experimental and model data about mesoscale dispersion.
Viewpoint Tethering for Remotely Operated Vehicles: Effects on Complex Terrain Navigation and Spatial Awareness
Authors: Hollands Justin G. , Lamb Matthew 
Published: March 2011

Objective: The effect of viewpoint on the navigation of complex terrain and on spatial awareness was examined with the use of a simulated remotely operated vehicle. Background: The ability to build terrain models in real time may soon allow remote vehicular control from any viewpoint. A virtual tether couples the viewpoint to the vehicle’s position and orientation, but shows more of the terrain than a fully immersive egocentric display. In this sense, it provides visual momentum by providing a view that incorporates egocentric and exocentric qualities. Method: For this study, 12 participants navigated a simulated vehicle across complex virtual terrain using five different display viewpoints: egocentric, dynamic tether, rigid tether, 3-D exocentric, and 2-D exocentric. While navigating, participants had to avoid being seen by simulated enemy units. After the navigation task, participants’ spatial awareness was assessed using a recognition task. Results: The tethered displays minimized the time during which the participant’s vehicle was visible to enemy positions. The egocentric display was more effective than exocentric displays (2-D or 3-D) for navigation, and the exocentric displays were more effective than egocentric for time seen during navigation and the recognition task. The tethered displays produced intermediate results for navigation and recognition. Conclusion: Viewpoint tethering produced the most effective displays for minimizing time seen, but tethered displays were less effective than egocentric and exocentric displays for navigation and recognition, respectively. Application: A tethered display is recommended for applications in which it is necessary to understand the relation of nearby locations to one’s own location.
Influence of Task Combination on EEG Spectrum Modulation for Driver Workload Estimation
Authors: Lei Shengguang , Roetting Matthias 
Published: March 2011

Objective: This study investigates the feasibility of using a method based on electroencephalography (EEG) for deriving a driver’s mental workload index. Background: The psychophysiological signals provide sensitive information for human functional states assessment in both laboratory and real-world settings and for building a new communication channel between driver and vehicle that allows for driver workload monitoring. Methods: An experiment combining a lane-change task and n-back task was conducted. The task load levels were manipulated in two dimensions, driving task load and working memory load, with each containing three task load conditions. Results: The frontal theta activity showed significant increases in the working memory load dimension, but differences were not found with the driving task load dimension. However, significant decreases in parietal alpha activity were found when the task load was increased in both dimensions. Task-related differences were also found. The driving task load contributed more to the changes in alpha power, whereas the working memory load contributed more to the changes in theta power. Additionally, these two task load dimensions caused significant interactive effects on both theta and alpha power. Conclusion: These results indicate that EEG technology can provide sensitive information for driver workload detection even if the sensitivities of different EEG parameters tend to be task dependent. Application: One potential future application of this study is to establish a general driver workload estimator that uses EEG signals.
Course of life satisfaction in patients with depressive and addictive disorders after therapeutic intervention
Authors: Büssing Arndt , Heusser Peter , Mundle Götz 
Published: March 2011

Background/Aim: To analyse the course of life satisfaction during the clinic stay of patients with depressive and/or addictive disorders. Methods: In a cohort study, 199 patients with depressive and addictive diseases were asked to complete a series of questionnaires at the start and the end of their psychotherapeutic treatment (on average 4.2 ± 2.3 weeks later). The questionnaires were the Brief Multidimensional Life Satisfaction Scale (BMLSS), the Positive Life Construction/Contentedness/Well-Being Scale from the ERDA (Emotional/Rational Disease Acceptance) questionnaire, Beck’s Depression Inventory and the revised Symptom Checklist (SCL-90-R). Results: The psychotherapeutic interventions improved the clinical situation of the patients and resulted in strong effects with respect to positive life construction ( d = 1.07) and moderate effects on life satisfaction ( d = 0.71). Stronger effects were noted in patients with depressive disorders ( d = 0.80) than in patients with addictive disorders ( d = 0.69). Regression analyses revealed that pre-treatment life satisfaction can be explained negatively by an escape-avoidance strategy (Escape from Illness), and positively by positive life construction. In contrast, post-treatment life satisfaction can be explained negatively by psychological distress and depression, and positively by positive life construction and living with a partner. Conclusion: The hypothesis that life satisfaction changes are associated with the clinical situation of patients was confirmed. In particular, patients with depressive disorders profited from the psychotherapeutic interventions.
A community–academic partnership develops a more responsive model to providing depression care to disadvantaged adults in the US
Authors: Dobransky-Fasiska Deborah , Nowalk Mary Patricia , Cruz Mario , McMurray Michelle L. , Castillo Enrico , Begley Amy E. , Pyle Pamala ,   RNDC-Community Partners, Pincus Harold Alan , Reynolds Charles F. , Brown Charlotte 
Published: March 2011

Background: Socioeconomically disadvantaged adults experience greater healthcare disparities and increased risk of depression compared to higher-income groups. Aim: To create a depression care model for disadvantaged adults utilizing service agencies, through a community–academic partnership. Methods: Using participatory research methods, an organizational needs assessment was performed to ascertain depression care needs, identify barriers to clients receiving treatment, and marshal resources. Interviews and surveys were conducted with community organizational leaders. Focus groups were conducted with clients who used the service agencies. Results: Interviews and surveys identified barriers including discontinuity of care and unmet basic needs for food, housing, health insurance and transportation. Focus groups enriched the understanding of barriers including lack of motivation to seek depression care, lack of social support and needed resources for the uninsured, underinsured and homeless. The findings were used to develop a depression care model combining depression management with motivational interviewing to evaluate and meet needs, and peer education to motivate and provide support. Conclusions: This partnership facilitated the development of a community-driven intervention that academic researchers acting alone could not realize. To provide depression care to socioeconomically disadvantaged individuals, the intervention must include mitigating solutions to barriers.
Mental vulnerability as a risk factor for depression: A prospective cohort study in Denmark
Authors: Østergaard Ditte , Dalton Susanne Oksbjerg , Bidstrup Pernille Envold , Poulsen Aslak Harbo , Frederiksen Kirsten , Eplov Lene Falgaard , Johansen Christoffer , Mortensen Erik Lykke 
Published: March 2011

Background and Aim: Mental vulnerability (i.e. a tendency to experience psychosomatic symptoms, mental symptoms or interpersonal problems) is associated with various diseases. This study investigated whether mental vulnerability is associated with hospitalization for depression. Methods: A prospective study was conducted of six cohorts from the population of Copenhagen County, Denmark, with baseline information on mental vulnerability, lifestyle, social factors and comorbidity collected in 1976, 1982–84, 1991 and 1997–98 ( N = 11,862). By register-linkage information on hospital contacts for affective disorders were obtained from the Danish Psychiatric Central Register. The association between mental vulnerability and depression was examined using Kaplan-Meier plots allowing for death as competing risk and Cox proportional-hazard models adjusting for possible confounders. Results: The cohort of 11,862 persons yielded a mean follow-up time of 12.3 years with 170 persons hospitalized with depression. The adjusted hazard ratio for hospitalization for depression associated with mental vulnerability was 1.23 (95% CI, 1.16–1.31) per step on the most used 12-item scale. Conclusions: Mental vulnerability may be a risk factor for depression. Early identification and treatment of depression are essential for preventing chronic depression, reduced social functioning and disability. Psychiatric interviews should be used to evaluate whether the criteria for depression are fulfilled, but it may furthermore be relevant to identify persons who may be at risk of developing depression in the long term. The possibility of using, for example, the mental vulnerability scale for such purpose should be further investigated.
Major depression across West Bank: A cross-sectional general population study
Authors: Madianos Michael G. , Sarhan Adnan Lufti , Koukia Evmorfia 
Published: March 2011

Background: In recent decades entire populations have been living under chronic strain, apprehension and violence. This is the case for Palestinians. Despite the increased volume of mass media attention on this situation, little is known about the psychological effects of this condition on this population. Aims: The study was designed to investigate the lifetime and one-month prevalence of major depression episode (MDE) in a multi-stage sample of 916 adult Palestinians drawn from the Al-Aqsa Intifada. Methods: The survey was based on personal interviews and was carried out from February to September 2007. The clinical examination used DSM-IV criteria for the detection of MDE, extracted from SCID-I. Data, suicidal behaviour, previous help seeking, medication use and exposure to trauma were also collected. Results: Lifetime and one-month prevalence of MDE was found to be 24.3% and 10.6%, respectively. Male Palestinians suffered from slightly higher rates of MDE than their female counterparts, but this difference was not statistically significant. Being widowed and living in towns in West Bank also increased the likelihood to develop MDE. A comparison of prevalence rates in refugee and non-refugee populations showed no significant differences. This could be explained by the fact that though refugees were forcibly displaced, they were living among compatriots (non-refugees), thus both groups were experiencing the same sociopolitical adversities. Being also exposed to traumatic events increased the risk of suffering from MDE. Conclusions: This study provides evidence that a population under continuous strain and apprehension, living in unremitting socioeconomic deprivation, is more likely to suffer from major depression.
A systematic review and synthesis of the quantitative and qualitative evidence behind patient-centred goal setting in stroke rehabilitation
Authors: Rosewilliam Sheeba , Roskell Carolyn Anne , Pandyan AD 
Published: March 2011

Objective: To map out from the literature the nature, extent and effects of application of patient-centred goal setting in stroke rehabilitation practice. Design: Systematic review. Data sources: A search was conducted in the Cochrane (Wiley), AMED, Medline (EBSCO), Embase, Sports discuss, Medline (Ovid) and CINAHL databases. Secondary search based on references from the preliminary search was undertaken. Review methods: Quantitative and qualitative studies that included aspects of patient-centredness and goal setting in stroke patients from 1980 to June 2010 were collected. Studies were scrutinized for relevance and quality based on published methodology. The findings were synthesized by aggregating the themes from the qualitative studies and relating them to relevant findings from the quantitative studies. Results: Eighteen qualitative and eight quantitative and one mixed method study conducted in stroke rehabilitation services ranging from acute to community rehabilitation were included. Themes that emerged were related to perceptions of patients and professionals regarding patient-centredness, nominal adoption of this concept, consequences of discrepancies in the perceptions and practice, related ethical conflicts, challenges to application and strategies to improve its application. The effects of following patient-centred goal-setting practice have been studied mostly with weak methodologies and studies show some benefit with psychological outcomes. Conclusion: Patient-centred goal setting is minimally adopted in goal-setting practice due to various barriers. Since the effects of incorporating this concept have not been evaluated rigorously it is suggested that further research is essential to investigate its effect on patient outcomes.
Outcomes of Revision Arthroscopic Type II Superior Labral Anterior Posterior Repairs
Authors: Park SangDo , Glousman Ronald E. 
Published: March 2011

Background: Outcomes of arthroscopic type II superior labral anterior posterior (SLAP) repairs have been reported with success. However, published data regarding outcomes of revision arthroscopic type II SLAP repairs are lacking. Hypothesis: Outcomes of revision arthroscopic type II SLAP repairs are inferior to those of primary repairs. Study Design: Case series; Level of evidence, 4. Methods: A retrospective chart review was performed to identify patients who had undergone revision arthroscopic type II SLAP repairs at our institution. Patients who underwent concomitant rotator cuff repairs or labral repairs for instability were excluded. Twelve patients were contacted, and the following outcome data were prospectively gathered: American Shoulder and Elbow Surgeons (ASES) score, patient satisfaction level, return to work, return to sports, and physical examination. Demographics and intraoperative report data were also collected from the charts. Results: The mean age at the time of revision arthroscopic type II SLAP repairs was 32.6 years (range, 19-67 years) with a mean follow-up of 50.5 months (range, 8-81 months). There were 5 workers’ compensation patients and 6 overhead athletes. Pain was the chief complaint at the time of initial and revision SLAP repairs. The mean ASES score was 72.5, patient satisfaction level was 6.4 (scale of 0-10), mean return to work was at 57.8% of the previous level, and mean return to sports was at 42.2% of the previous level. In overhead athletes, mean return to sports was at 41.3% of the previous level, and none of the 4 baseball players returned to preinjury level. The mean values for all outcome data and range of motion values were lower in workers’ compensation patients. There were no reported complications, but 2 patients required additional arthroscopic surgeries. Conclusion: Arthroscopic revision type II SLAP repairs yield worse results than primary repairs as reported in the literature, with workers’ compensation patients and overhead athletes doing especially worse. A larger prospective study of this relatively rare procedure is needed to better determine which patients may benefit from this procedure.