scholarly journals Effect of Environmental Conditions on the Dehydration and Performance of Fire-Protective Gels

2020 ◽  
Author(s):  
Jacob Kadel ◽  
Faraz Hedayati ◽  
Stephen L. Quarles ◽  
Aixi Zhou
Keyword(s):  
Relative Humidity ◽  
Mass Loss ◽  
Fire Performance ◽  
Specific Mass ◽  
Fire Front ◽  
And Performance ◽  
The Relationship ◽  
High Winds ◽  
Specific Mass Loss ◽  
Better Than

Abstract During wildfire events fire-protective gels can be used as a line of defense to protect structures. The effectiveness of freshly applied gels in delaying ignition and flame growth on structures has been well established. However, in a real-world scenario there is a period between the application of the gel and the arrival of a spot fire or the fire-front. During this period, the gels are often exposed to extreme conditions consisting of high winds and low relative humidity. The effect of these weathering conditions on the performance of fire-protective gels is still poorly understood. This study examined the dehydration and performance of fire-protective gels following a range of weathering conditions. Two commercially available gels were applied to a 100-mm by 100-mm T1-11 plywood sample and then artificially weathered in an environmental chamber, with controlled temperature, relative humidity, and wind. The remaining mass of the gels was measured at selected intervals to determine the relationship between mass loss and dehydration related to weathering. A second series of tests was conducted on weathered T1-11 samples at specific mass loss states as well as on freshly applied gels using a 50 kW/m2 heat flux exposure utilizing a cone calorimeter. Results indicated that they dehydrated to the point where, after 3 h, fire performance was no better than the uncoated wood samples and the gels could facilitate ignition. This timeline suggests that gels should only be applied by first responders and homeowners should focus on evacuation related activities.

Synergistic effect of Al2O3/TiO2 reinforcements on slurry erosion performance of nickel-based composite coatings

2017 ◽  
Vol 232 (8) ◽  
pp. 974-986 ◽  
Author(s):  
Rajeev Kumar ◽  
Sanjeev Bhandari ◽  
Atul Goyal
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Mass Loss ◽  
Erosion Resistance ◽  
Slurry Erosion ◽  
Specific Mass ◽  
Operational Parameter ◽  
X Ray ◽  
Specific Mass Loss ◽  
Scanning Electron

Various aspects such as development, experimentation, and analysis have been covered in the present work to examine the behavior of test coatings under slurry erosion. The primary objective of the present study was to establish the specific mass loss from the test coatings under various slurry environmental conditions and highlights the importance of the addition of alumina in improving the slurry erosion resistance of Ni-TiO2 coating. To attain this objective, two powder compositions, viz. Ni-20TiO2 and Ni-15TiO2-5Al2O3 were deposited onto the CA6NM grade hydro-turbine steel using high velocity frame spray process. The microstructural characterization of the coatings was done by employing surface roughness tester, scanning electron microscope/energy-dispersive X-ray spectroscopy, and X-ray diffraction techniques, whereas mechanical analysis was carried out using micro-hardness and bond strength tester. The slurry erosion tests were performed using an indigenously fabricated high speed slurry erosion test rig at different levels of rotational speed, average particle size of erodent, and slurry concentration in order to explore their effects on slurry erosion performance of test coatings. The slurry erosion results, as well as scanning electron microscope observations of eroded specimens, revealed higher slurry erosion resistance of Ni-15TiO2-5Al2O3 coating in comparison with Ni-20TiO2 coating. Furthermore, each operational parameter was found to have a proportional effect on specific mass loss in case of both the coatings.

scholarly journals KUALITAS BELANJA DAERAH DAN HUBUNGANNYA DENGAN KINERJA PEMBANGUNAN DI PROVINSI BANTEN

2018 ◽  
Vol 6 (2) ◽  
pp. 16-31
Author(s):  
Sri Wahyuni ◽  
Bambang Juanda ◽  
Idqan Fahmi
Keyword(s):  
Structural Equation ◽  
Secondary Data ◽  
Equation Model ◽  
Version 2.0 ◽  
Performance Development ◽  
And Performance ◽  
The Relationship ◽  
Quality Map ◽  
Better Than

This study aims to analyze the relevant indicators of spending quality in measuring the quality of regional spending as well as the relationship between the quality of regional spending and the development performance of the regencies/cities of Banten Province. This study uses secondary data from the governance, financial and performance development of the districts/cities of Banten Province between 2009 – 2013. The Data are analyzed using Partial Least Squares Structural Equation Model (PLS–SEM) using SmartPLS software version 2.0 & SmartPLS version 3.0. The Results show that there are 21 indicators out of 40 indicators that are relevant in measuring the quality of the districts/cities spending in Banten Province. The change of the spending quality map from 2009 to 2013 shows that the quality of North Banten (Tangerang Regency, Tangerang City, Tangerang Selatan, Serang Regency, Serang City and Cilegon City) is better than South Banten (Pandeglang and Lebak). In addition, the estimation results from the model used indicate that the quality of the region spending of Banten Provinve has a positive relationship with the performance of development with the value of the indicator 0,678. Keywords : Development Performance, PLS-SEM, Spending Quality

scholarly journals The Technological Progress of the Fuel Consumption Rate for Passenger Vehicles in China: 2009–2016

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2384 ◽  
Author(s):  
Jihu Zheng ◽  
Rujie Yu ◽  
Yong Liu ◽  
Yuhong Zou ◽  
Dongchang Zhao
Keyword(s):  
Fuel Consumption ◽  
Technological Progress ◽  
Consumption Rate ◽  
Joint Venture ◽  
Passenger Vehicles ◽  
Fuel Consumption Rate ◽  
The Difference ◽  
And Performance ◽  
The Relationship ◽  
Better Than

China has set stringent fuel consumption rate (FCR) targets to address the serious environmental and energy security problems caused by vehicles. Estimating the technological progress and tradeoffs between FCR and vehicle attributes is important for assessing the viability of meeting future targets. In this paper, we explored the relationship between vehicle FCR and other attributes using a regression model with data from 2009–2016. We also quantified the difference in the tradeoff between local and joint venture brands. The result showed that from 2009 to 2016, if power and curb mass were held constant, 2.3% and 2.9% annual technological progress should have been achieved for local and joint venture brands, respectively. The effectiveness of fuel-efficient technologies for joint venture brands is generally better than that of local brands. Impacts of other attributes on FCR were also assessed. The joint venture brands made more technological progress with FCR improvement than that of local brands. Even if 100% of technological progress (assume the technological progress in the future were the same as that of 2009–2016) investment were used to improve actual FCR after 2016, it would be difficult to meet 2020 target. Accelerating the adoption of fuel-efficient technologies, and controlling weight and performance, are both needed to achieve the 2020 and 2025 targets.

scholarly journals Why does offspring size affect performance? Integrating metabolic scaling with life-history theory

2015 ◽  
Vol 282 (1819) ◽  
pp. 20151946 ◽  
Author(s):  
Amanda K. Pettersen ◽  
Craig R. White ◽  
Dustin J. Marshall
Keyword(s):  
Life History ◽  
Life History Theory ◽  
Maternal Investment ◽  
Offspring Size ◽  
Metabolic Efficiency ◽  
Metabolic Scaling ◽  
And Performance ◽  
The Relationship ◽  
General Explanation ◽  
Better Than

Within species, larger offspring typically outperform smaller offspring. While the relationship between offspring size and performance is ubiquitous, the cause of this relationship remains elusive. By linking metabolic and life-history theory, we provide a general explanation for why larger offspring perform better than smaller offspring. Using high-throughput respirometry arrays, we link metabolic rate to offspring size in two species of marine bryozoan. We found that metabolism scales allometrically with offspring size in both species: while larger offspring use absolutely more energy than smaller offspring, larger offspring use proportionally less of their maternally derived energy throughout the dependent, non-feeding phase. The increased metabolic efficiency of larger offspring while dependent on maternal investment may explain offspring size effects—larger offspring reach nutritional independence (feed for themselves) with a higher proportion of energy relative to structure than smaller offspring. These findings offer a potentially universal explanation for why larger offspring tend to perform better than smaller offspring but studies on other taxa are needed.

Psychological Differentiation and Performance on Conditional Reasoning Tasks

1978 ◽  
Vol 47 (3) ◽  
pp. 935-940 ◽  
Author(s):  
Marvin W. Boss ◽  
Martin E. Amin
Keyword(s):  
Significant Interaction ◽  
Conditional Reasoning ◽  
Psychological Differentiation ◽  
Field Independent ◽  
Field Dependent ◽  
Reasoning Tasks ◽  
And Performance ◽  
The Relationship ◽  
Better Than ◽  
Grade 8

The relationship between psychological differentiation and performance on three content types (concrete-plausible, concrete-implausible, symbolic) of conditional reasoning tasks was investigated. Using intelligence as a covariate, field-independent subjects ( n = 94) in Grade 8 performed significantly better than field-dependent subjects ( n = 121) on each type of content. A significant interaction was found. Greater differences between field-independent and field-dependent subjects were observed for concrete-implausible and symbolic contents than for concrete-plausible content.

Personality Dimensions and Reversible Perspective in Embedded Figures Test

1978 ◽  
Vol 46 (3) ◽  
pp. 1016-1018 ◽  
Author(s):  
Robert Loo
Keyword(s):  
Performance Variables ◽  
Embedded Figures Test ◽  
Individual Test ◽  
Two Samples ◽  
Embedded Figures ◽  
And Performance ◽  
The Individual ◽  
The Relationship ◽  
Experienced Difficulty ◽  
Better Than

The study examined the relationship between performance on reversible-perspective items in individual and group embedded-figures tests and remaining items, personality and performance variables in two samples of normal females. Performance on the reversible-perspective items was better than on the remaining items in the individual test and as good as other items in the group test. Those who experienced difficulty in solving the reversible-perspective items had more “psychiatric” complaints and greater sociability than subjects who experienced little difficulty.

Relationship between Emotional State and Performance during International Field Hockey Matches

2000 ◽  
Vol 90 (2) ◽  
pp. 691-701 ◽  
Author(s):  
Marc V. Jones ◽  
Roger D. Mace ◽  
Simon Williams
Keyword(s):  
Logistic Regression ◽  
Emotional State ◽  
Emotional States ◽  
Field Hockey ◽  
Long Duration ◽  
Hockey Players ◽  
Competition Period ◽  
And Performance ◽  
The Relationship ◽  
Better Than

The present study examined the relationship between the emotions experienced by 15 international hockey players, both immediately before and during competition, and their performance levels. Data were collected on the players' emotional states using a revised version of the Feelings Scale of Butler, which was completed retrospectively after the match was played. Players reported more annoyance and less tension during the match than before. A logistic regression correctly classified 70.2% of players from the emotional ratings immediately before the match and 85.1% of the players from the ratings during the match as either a good or poor performer. Those individuals who performed well retrospectively reported feeling Nervous and ‘Quick/Alert/Active’ before the game and Confident and Relaxed during the game. The results indicate that emotions fluctuate over the competition period, and in long duration sports assessment of emotion during competition predicts variation in performance better than assessment prior to competition.

scholarly journals The Role of Employees’ Work Patterns and Office Type Fit (and Misfit) in the Relationships Between Employee Well-Being and Performance

2018 ◽  
Vol 52 (2) ◽  
pp. 111-138 ◽  
Author(s):  
Aida Soriano ◽  
Malgorzata W. Kozusznik ◽  
José M. Peiró ◽  
Carolina Mateo
Keyword(s):  
Positive Emotions ◽  
Well Being ◽  
Role Performance ◽  
Work Patterns ◽  
Work Pattern ◽  
Work Tasks ◽  
And Performance ◽  
The Relationship ◽  
Better Than

Nearly half of workers agree that their workspace is unsuitable for their work tasks. Furthermore, it is assumed that happy workers often perform better than unhappy ones. Nevertheless, due to the effect of the emotional-cognitive processes, the misfit between employees’ office type and their work patterns (complexity and interactivity) may hamper this relationship between well-being and performance. This diary study on 83 office workers ( n = 603 time points) combines information about work patterns identified by using cluster analysis with Neufert’s office type classification. Results show that the work pattern–office type (mis)fit moderates the relationship between well-being and performance. The “fit” group shows four out of six positive associations: flow and positive emotions with in-role performance, and positive emotions and activity worthwhileness with extra-role performance. The “misfit” group shows only one out of six positive associations. Thus, the office environment–work pattern fit has a relationship to in-role and extra-role performance.

scholarly journals The Relationship Between Electronic Health Record System and Performance on Quality Measures in the American College of Rheumatology’s Rheumatology Informatics System for Effectiveness (RISE) Registry: Observational Study

10.2196/31186 ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. e31186
Author(s):  
Nevin Hammam ◽  
Zara Izadi ◽  
Jing Li ◽  
Michael Evans ◽  
Julia Kay ◽  
...  
Keyword(s):  
Electronic Health Record ◽  
Quality Measures ◽  
Independent Effect ◽  
Health Record ◽  
Practice Level ◽  
Patient Reported ◽  
Electronic Health ◽  
And Performance ◽  
The Relationship ◽  
Better Than

Background Routine collection of disease activity (DA) and patient-reported outcomes (PROs) in rheumatoid arthritis (RA) are nationally endorsed quality measures and critical components of a treat-to-target approach. However, little is known about the role electronic health record (EHR) systems play in facilitating performance on these measures. Objective Using the American College Rheumatology’s (ACR’s) RISE registry, we analyzed the relationship between EHR system and performance on DA and functional status (FS) quality measures. Methods We analyzed data collected in 2018 from practices enrolled in RISE. We assessed practice-level performance on quality measures that require DA and FS documentation. Multivariable linear regression and zero-inflated negative binomial models were used to examine the independent effect of EHR system on practice-level quality measure performance, adjusting for practice characteristics and patient case-mix. Results In total, 220 included practices cared for 314,793 patients with RA. NextGen was the most commonly used EHR system (34.1%). We found wide variation in performance on DA and FS quality measures by EHR system (median 30.1, IQR 0-74.8, and median 9.0, IQR 0-74.2), respectively). Even after adjustment, NextGen practices performed significantly better than Allscripts on the DA measure (51.4% vs 5.0%; P<.05) and significantly better than eClinicalWorks and eMDs on the FS measure (49.3% vs 29.0% and 10.9%; P<.05). Conclusions Performance on national RA quality measures was associated with the EHR system, even after adjusting for practice and patient characteristics. These findings suggest that future efforts to improve quality of care in RA should focus not only on provider performance reporting but also on developing and implementing rheumatology-specific standards across EHRs.

scholarly journals Somatotype, Level of Competition, and Performance in Attack in Elite Male Volleyball

2017 ◽  
Vol 58 (1) ◽  
pp. 131-140 ◽  
Author(s):  
Nikiforos Giannopoulos ◽  
George Vagenas ◽  
Konstantinos Noutsos ◽  
Karolina Barzouka ◽  
Nikolaos Bergeles
Keyword(s):  
Function Analysis ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Numerical Scale ◽  
Competition Level ◽  
Elite Level ◽  
And Performance ◽  
The Relationship ◽  
Better Than

AbstractThis study investigated the relationship between somatotype, level of competition, and performance in attack in elite level male volleyball players. The objective was to test for the potential covariation of competition level (Division A1 vs. A2) and playing position (hitters vs. centers vs. opposites) considering performance in attack. Anthropometric, body composition and somatotype variables were measured according to the Heath-Carter method. The attack actions of 144 players from 48 volleyball matches were analyzed and their performance was rated using a 5-point numerical scale. Results showed that players of Division A1 were taller, heavier, more muscular, and less endomorphic compared to those of Division A2. MANOVA and follow-up discriminant function analysis revealed somatotype differences among playing positions with centers and opposites being endomorph-ectomorph and hitters being central. Centers performed constantly better than hitters and opposites regardless of the division and somatotype. Multiple linear regression analysis showed that variables defining ectomorph and endomorph players, centers, and players of Division A1 significantly determined the relative performance superiority and were able to explain the variation in performance by almost 25%. These results could be taken into account by coaches when assigning players to particular playing positions or when designing individualized position-specific training programs.

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