bluuebunny/crossref_metadata_2025_split huggingface dataset:
Seasonal Variation of Surface Temperature Change during the Last Several Decades
Authors: Manabe Syukuro , Ploshay Jeffrey , Lau Ngar-Cheung 
Published: June 2011

Abstract
Using the historical surface temperature dataset compiled by Climatic Research Unit of the University of East Anglia and the Hadley Centre of the United Kingdom, this study examines the seasonal and latitudinal profile of the surface temperature change observed during the last several decades. It reveals that the recent change in zonal-mean surface air temperature is positive at practically all latitudes. In the Northern Hemisphere, the warming increases with increasing latitude and is large in the Arctic Ocean during much of the year except in summer, when it is small. At the Antarctic coast and in the northern part of the circumpolar ocean (near 55°S), where limited data are available, the changes appear to be small during most seasons, though the warming is notable at the coast in winter. However, this warming is much less than the warming over the Arctic Ocean. The seasonal variation of the surface temperature change appears to be broadly consistent with the result from a global warming experiment that was conducted some time ago using a coupled atmosphere–ocean–land model.
Deep Signatures of Southern Tropical Indian Ocean Annual Rossby Waves*
Authors: Johnson Gregory C. 
Published: June 2011

Abstract
The southern tropical Indian Ocean contains a striking forced annual Rossby wave studied previously using satellite altimeter sea surface height data, surface wind fields, expendable bathythermograph ocean temperature data, and models. Here, the deep reach of this wave and its velocity are analyzed using density–depth profiles and 1000-dbar horizontal drift data from Argo. Significant annual cycles in isopycnal vertical displacements and zonal velocity persist to the deepest pressures to which Argo data can be mapped reliably in the region, 1600–1900 dbar. Phase propagation of the annual cycle of the directly measured zonal velocities at 1000 dbar suggests a zonal wavelength of about 6000 km—about the length of the deep basin in which the wave is found—and a westward phase speed of ~0.2 m s−1. Apparent upward phase propagation in isopycnal vertical displacements suggests energy propagation downward into the abyss. This pattern is clearer when accounting for both the potential and kinetic energy of the wave. The largest zonal current associated with this wave has a middepth maximum that decays rapidly up through the pycnocline and less rapidly with increasing depth, suggesting a first-vertical-mode structure. The anomalous zonal volume transport of this annually reversing current is ~27 × 106 m3 s−1 across 80°E in mid-November. The peak zonal velocity of 0.06 m s−1 implies a maximum zonal excursion of about 600 km associated with the wave over an annual cycle.
Assessments of Chinese Fengyun Microwave Temperature Sounder (MWTS) Measurements for Weather and Climate Applications
Authors: Zou X. , Wang X. , Weng F. , Li G. 
Published: June 2011

Abstract
After the successful launches of the first two polar-orbiting satellites in a new Fengyun-3 (FY-3) series, FY-3A/B, into a morning- and afternoon-configured orbit in May 2008 and November 2010, respectively, China will launch its next three polar-orbiting satellites before 2020. The Microwave Temperature Sounder (MWTS) on the FY-3A/B satellites has four channels that have the same channel frequency as channels 3, 5, 7, and 9 of Advanced Microwave Sounding Unit-A (AMSU-A). Thus, the quality of the brightness temperature measurements from the FY-3A MWTS can be assessed using the AMSU-A brightness temperature observations from the NOAA-18 satellite. Overall, MWTS data compare favorably with AMSU-A data in terms of its global bias to NWP simulations. The standard deviations of global MWTS brightness temperatures are slightly larger than those of AMSU-A data. The scan-angle dependence of the brightness temperature bias is found to be symmetric for MWTS channel 3 as well as AMSU-A channel 7, and asymmetric for MWTS channels 2 and 4 and AMSU-A channels 5 and 9; there is a warm (cold) bias located at the beginning (end) of a scan line for all asymmetric channels except for MWTS channel 4. A major difference between the two instruments is that the MWTS biases in channels 3 and 4 are negative in low latitudes and positive in high latitudes, while the AMSU-A biases are negative in all latitudes. A detailed analysis of the data reveals that such a difference is closely related to the difference in the temperature dependence of biases between the two instruments. The AMSU-A biases are independent of the scene temperature, but MWTS biases vary with the earth scene brightness temperature. The root cause of the bias could be a combination of several factors, including solar contamination on its calibration target, detector nonlinearity, and the center frequency drift. This study further demonstrates the utility of a well-calibrated radiometer like AMSU-A for the assessment of a new instrument with NWP fields that are used as inputs to forward radiative transfer simulations.
Intensity and Structure Changes during Hurricane Eyewall Replacement Cycles
Authors: Sitkowski Matthew , Kossin James P. , Rozoff Christopher M. 
Published: June 2011

Abstract
A flight-level aircraft dataset consisting of 79 Atlantic basin hurricanes from 1977 to 2007 was used to develop an unprecedented climatology of inner-core intensity and structure changes associated with eyewall replacement cycles (ERCs). During an ERC, the inner-core structure was found to undergo dramatic changes that result in an intensity oscillation and rapid broadening of the wind field. Concentrated temporal sampling by reconnaissance aircraft in 14 of the 79 hurricanes captured virtually the entire evolution of 24 ERC events. The analysis of this large dataset extends the phenomenological paradigm of ERCs described in previous observational case studies by identifying and exploring three distinct phases of ERCs: intensification, weakening, and reintensification. In general, hurricanes intensify, sometimes rapidly, when outer wind maxima are first encountered by aircraft. The mean locations of the inner and outer wind maximum at the start of an ERC are 35 and 106 km from storm center, respectively. The intensification rate of the inner wind maximum begins to slow and the storm ultimately weakens as the inner-core structure begins to organize into concentric rings. On average, the inner wind maximum weakens 10 m s−1 before the outer wind maximum surpasses the inner wind maximum as it continues to intensify. This reintensification can be quite dramatic and often brings the storm to its maximum lifetime intensity. The entire ERC lasts 36 h on average.
Comparison of flight-level data and microwave imagery reveals that the first appearance of an outer wind maximum, often associated with a spiral rainband, typically precedes the weakening of the storm by roughly 9 h, but the weakening is already well under way by the time a secondary convective ring with a well-defined moat appears in microwave imagery. The data also show that winds beyond the outer wind maximum remain elevated even after the outer wind maximum contracts inward. Additionally, the contraction of the outer wind maximum usually ceases at a radius larger than the location of the inner wind maximum at the start of the ERC. The combination of a larger primary eyewall and expanded outer wind field increase the integrated kinetic energy by an average of 28% over the course of a complete ERC despite little change in the maximum intensity between the times of onset and completion of the event.
Better knowledge on vitamin D and calcium in older people is associated with a higher serum vitamin D level and a higher daily dietary calcium intake
Authors: Oudshoorn Christian , Hartholt Klaas A , van Leeuwen Johannes PTM , Colin Edgar M , van der Velde Nathalie , van der Cammen Tischa JM 
Published: June 2011

Objective: The objective of the present study was to examine knowledge on vitamin D and calcium in a cohort of older adults and to test the association between health knowledge, vitamin D status and dietary calcium intake. Methods: The participants of this cross-sectional survey consisted of 426 individuals (≥65 years), living in residential homes. Participants were tested for their knowledge on vitamin D and calcium using a standardized questionnaire. Serum 25-hydroxyvitamin D3 (25(OH)D3) levels and dietary calcium intake were measured. Results: The mean serum 25(OH)D3 level was 39.1 (±21.4) nmol/l and the mean daily dietary calcium intake was 826 (±242) mg/day. Of the participants, only 38 per cent indicated that they knew or had heard of vitamin D. Participants overestimated their daily calcium intake. Better knowledge on vitamin D and calcium was associated with both higher vitamin D levels ( P < 0.0001) and a higher daily dietary calcium intake ( P < 0.0001). Conclusion: Given the poor knowledge on vitamin D and calcium and the observed associations, improving health knowledge could be a possible intervention to improve vitamin D status and calcium intake in older people. Further studies are needed to assess whether education will indeed lead to improvement of vitamin D levels and calcium intake in this age group.
An intervention to improve the oral health of residents in an aged care facility led by nurses
Authors: Blinkhorn FA , Weingarten L , Boivin L , Plain J , Kay M 
Published: June 2011

Introduction: The growing population of elderly people is impacting on overstretched dental services in many countries, as many individuals are retaining natural teeth and may have dentures or implants, all of which influence the way in which the oral cavity must be cared for. A major difficulty for older residents is their decreasing level of motor and cognitive functioning to adequately self-care for their mouths. Hence, the role of the nurse is crucial. However, staff shortages, time factors and lack of awareness can lead to neglect of the mouth in this population. The loss of function is often exacerbated in individuals with mental health problems. Objectives: To improve the oral health of residents in an aged care mental health unit through the introduction of an innovative nursing intervention. Methods: Firstly, utilizing focus groups, nursing staff identified the main barriers to delivery of oral hygiene to residents as follows: lack of proper equipment; no protocol in place; lack of knowledge. Staff knowledge of oral health and hygiene was measured using a structured questionnaire before and after the intervention. A training program was devised by a dentist, dietician and nurse working in the unit. A multidisciplinary team met on several occasions to design a suitable vehicle and process to deliver oral hygiene. Oral health examinations were conducted at baseline, three months and 12 months. Interventions: Design and production of oral hygiene trolley; development of protocol for oral hygiene; staff education in oral health. Results: The program was successful in improving the oral health of residents with reductions in plaque scores, gingivitis and pocket depths. The oral hygiene protocol was positively accepted into a daily routine and the knowledge of staff in matters relating to oral health increased. Conclusions: A simple oral health intervention utilizing qualified nurses and a purpose-built oral hygiene trolley made significant improvements to the oral health of aged care residents.
Fashion Versus Perception: The Impact of Surface Lightness on the Perceived Dimensions of Interior Space
Authors: Oberfeld Daniel , Hecht Heiko 
Published: June 2011

Objectives: We compare expert opinion with perceptual judgment regarding the influence of color on the perceived height and width of interior rooms. Background: We hypothesize that contrary to popular belief, ceiling and wall lightness have additive effects on perceived height, whereas the lightness contrast between these surfaces is less important. We assessed the intuitions of architectural experts as to which surface colors maximize apparent height and compared these intuitions with psychophysical height and width estimates for rooms differing in ceiling, floor, and wall lightness. Method: Experiment 1 was a survey of architectural experts and nonexperts. Experiments 2 and 3 presented virtual rooms varying in physical height, physical width, and surface lightness. Results: In Experiment 1, both experts and nonexperts erroneously assumed that the lightness contrast between ceiling and walls influences perceived height. Experiment 2 showed that the lightness contrast does not determine apparent height but that ceiling and wall lightness have additive effects. Experiment 3 demonstrated a decrease in perceived width with physical height, whereas the perceived height was not related to physical width. Apparent width was unaffected by ceiling lightness. Conclusion:: Light ceiling and light walls make a room appear higher, whereas floor color has a weaker effect. We also found evidence for an asymmetric interaction between height and width. Application: The question of how to color walls and ceiling to maximize the apparent size of a room can be answered empirically. Aesthetic considerations may interfere with the correct assessment of the effects of color in experts.
Fostering Creativity in Product and Service Development: Validation in the Domain of Information Technology
Authors: Zeng Liang , Proctor Robert W. , Salvendy Gavriel 
Published: June 2011

Objective: This research is intended to empirically validate a general model of creative product and service development proposed in the literature. Background: A current research gap inspired construction of a conceptual model to capture fundamental phases and pertinent facilitating metacognitive strategies in the creative design process. The model also depicts the mechanism by which design creativity affects consumer behavior. The validity and assets of this model have not yet been investigated. Method: Four laboratory studies were conducted to demonstrate the value of the proposed cognitive phases and associated metacognitive strategies in the conceptual model. Realistic product and service design problems were used in creativity assessment to ensure ecological validity. Results: Design creativity was enhanced by explicit problem analysis, whereby one formulates problems from different perspectives and at different levels of abstraction. Remote association in conceptual combination spawned more design creativity than did near association. Abstraction led to greater creativity in conducting conceptual expansion than did specificity, which induced mental fixation. Domain-specific knowledge and experience enhanced design creativity, indicating that design can be of a domain-specific nature. Design creativity added integrated value to products and services and positively influenced customer behavior. Conclusion: The validity and value of the proposed conceptual model is supported by empirical findings. Application: The conceptual model of creative design could underpin future theory development. Propositions advanced in this article should provide insights and approaches to facilitate organizations pursuing product and service creativity to gain competitive advantage.
Prevalence and social determinants of suicidal behaviours among college youth in India
Authors: Nath Yogini , Paris Joel , Thombs Brett , Kirmayer Laurence 
Published: June 2011

Background: Little is known about the prevalence of and factors associated with suicide ideation and suicide attempts among college youth in India. Aims: The aims were to estimate the prevalence of suicidal behaviours among Indian college students and identify potential risk factors for suicide ideation and attempts. Method: The study surveyed 1,817 undergraduate college students aged 18–24 years in Ahmedabad, Gujarat, with a questionnaire that assessed suicidal behaviours as well as stressful situations and life events. Logistic regression analysis was used to assess risk factors. Results: The prevalence of lifetime suicide ideation and lifetime suicide attempts was 11.7% and 4.0%, respectively. Suicide ideation was predicted by female gender, odds ratio ( OR) = 1.41, 95% CI 1.01, 1.97, economic stress, OR = 1.17, 95% CI 1.11, 1.24, stress due to life events involving religious violence in the community, OR = 1.43, 95% CI 1.15, 1.78, and life events involving caste conflicts or caste discrimination, OR = 1.28, 95% CI 1.13, 1.46. Female gender and caste-related life events were not significantly associated with suicide attempts but economic stress and stressful experience of religious conflict continued to be significantly associated with lifetime suicide attempt, OR = 1.19, 95% CI 1.08, 1.31, and OR = 1.58, 95% CI 1.14, 2.17, respectively. Conclusions: In this sample, college students from low socioeconomic classes who faced economic difficulties, and students who experienced distress as a result of caste discrimination or caste conflict, and communal unrest, were at a higher risk for suicidal behaviour.
Ventilation Tube Treatment
Authors: Hellström Sten , Groth Anita , Jörgensen Finn , Pettersson Agneta , Ryding Marie , Uhlén Inger , Boström Kristina Bengtsson 
Published: June 2011

ObjectiveThe aim of this review was to study the effectiveness of ventilation tube (VT) treatment in children with secretory otitis media (SOM), assessed by improved hearing, normalized language and quality of life (QoL), and recurrent acute otitis media (rAOM), assessed by number of episodes of AOM and QoL.Data SourcesCochrane Library, PubMed, and Embase databases were searched for randomized and nonrandomized controlled trials and cohort studies in English, Scandinavian, German, and French languages between 1966 and April 2007. Additional literature was retrieved from reference lists in the articles.Review MethodsA total of 493 abstracts were evaluated independently by 2 members of the project group, 247 full‐text versions were assessed for inclusion criteria and quality using structured evaluation forms, and 63 articles were included in the review.Results and ConclusionsThis review shows that there is strong scientific evidence (grade 1) that VT treatment of SOM improves hearing for at least 9 months and that QoL is improved for up to 9 months (grade 2 scientific evidence). There was insufficient evidence to support an effect of VT treatment for rAOM. There was also insufficient evidence to determine whether the design or material of the VT or the procedure used for insertion had any influence on the effect; however, there was some evidence (grade 3) that aspiration of secretion at insertion does not prolong VT treatment. Further research is needed to address these issues.
Diagnostic Value of Bent‐Lever Planes in Detecting Abnormality of the Malleus‐Incus Complex
Authors: Quan Yong , Wu Lebin , Li Jianfeng , Xu Zushan , Gong Ruozhen 
Published: June 2011

ObjectiveTo retrospectively investigate the diagnostic value of the bent‐lever planes in detecting abnormality of the malleus‐incus complex.Study DesignDiagnostic test assessment.SettingThe study was conducted at the Shandong Medical Imaging Research Institute, Shandong University, Jinan, People’s Republic of China.SubjectsEighty‐five ears in 74 patients with surgically proved abnormality of the malleus‐incus complex.Materials and MethodsThe bent‐lever planes and direct axial images were reviewed by 2 radiologists. The radiologists assigned a value of abnormality or continuity to different parts of the malleus‐incus complex. Differences in categorical data were evaluated with the McNemar test. The sensitivity, specificity, Youden index, and interobserver agreement were calculated.ResultsThere was no significant difference between bent‐lever planes and direct axial images in identifying abnormality of the malleus‐incus complex. The sensitivity ranged from 71.4% to 97.1%, and specificity ranged from 89.5% to 100.0%. The Youden index ranged from 0.609 to 0.971. The radiologists had almost perfect or substantial agreement in identifying the abnormality of different parts of the malleus‐incus complex.ConclusionThe bent‐lever planes do not add additional diagnostic value for experienced observers.
Treatment of Velopharyngeal Insufficiency by Pharyngeal and Velar Fat Injections
Authors: Cantarella Giovanna , Mazzola Riccardo F. , Mantovani Mario , Baracca Giovanna , Pignataro Lorenzo 
Published: June 2011

The aim of this prospective study was to evaluate the effectiveness of fat injections in the treatment of velopharyngeal insufficiency (VPI). The study involved 10 patients (6 adults aged 19‐48 years and 4 children aged 5‐13 years) with mild/moderate VPI who were injected with 3.5 to 8 mL of fat in the posterior, lateral pharyngeal walls and soft palate under general anaesthesia. A second fat‐grafting procedure was performed in 2 patients to achieve further improvement. Nasoendoscopy revealed a reduction in the closure gap in all patients, and the perceptual evaluation demonstrated improved speech intelligibility and resonance and reduced nasal air leakage in all cases (P <. 005). The aerodynamic assessment showed a significant reduction in nasal airflow during phonation (P <. 05). Follow‐up was 6 to 23 months. In conclusion, fat injections improved voice resonance and reduced nasal air escape in all treated cases and can be a promising alternative to major procedures, such as velopharyngoplasties, for the treatment of mild/moderate VPI.
Platelet-Rich Plasma Protects Tenocytes From Adverse Side Effects of Dexamethasone and Ciprofloxacin
Authors: Zargar Baboldashti Nasim , Poulsen Raewyn C. , Franklin Sarah L. , Thompson Mark S. , Hulley Philippa A. 
Published: June 2011

Background: Ruptured tendons heal very slowly and complete recovery from injury is uncertain. Platelet-rich plasma (PRP), a rich source of growth factors, is currently being widely tested as a soft tissue healing agent and may accelerate tendon repair. The authors assessed the ability of PRP to prevent in vitro adverse effects of 2 drugs commonly linked to tendon rupture and tendinopathy, glucocorticoids and fluoroquinolone antibiotics. Hypothesis: The pro-healing response induced by PRP protects human tenocytes against the cytotoxic effects of dexamethasone and ciprofloxacin. Study Design: Controlled laboratory study. Methods: Human primary hamstring tenocytes were exposed to different doses of ciprofloxacin and dexamethasone with and without PRP. AlamarBlue, β-galactosidase assay, and live/dead stain were used to measure, respectively, viability, senescence, and death in tenocyte culture. Results: The viability of cells exposed to high doses of ciprofloxacin was significantly decreased compared with controls, with no induced senescence but increased cell death. Dexamethasone reduced viable cell number without inducing overt cell death, but the number of senescent cells increased considerably. After co-treatment with 10% PRP, viable cell number increased significantly in both conditions and the number of dead cells decreased in ciprofloxacin-treated cultures. Moreover, dexamethasone-induced senescence was markedly reduced by co-treatment with 10% PRP. Conclusion: This study demonstrates that ciprofloxacin and dexamethasone have differing adverse effects on human tenocytes, with ciprofloxacin inducing cell death while dexamethasone primarily induces senescence. The authors showed that PRP can protect cultured human tenocytes against cell death or senescence induced by these drugs. Clinical Relevance: Both ciprofloxacin and dexamethasone are highly effective in treatment of inflammatory and infectious conditions, therefore new strategies to minimize their adverse effects are of strong interest. These findings suggest the potential for local administration of PRP to enhance tendon healing in patients undergoing glucocorticoid or fluoroquinolone treatment.