325 research outputs found
Aggressive Risk factor REduction STudy for Atrial Fibrillation (ARREST-AF) implications for ablation outcomes: A Randomized Clinical Trial
No full text2024 AHA Late-Breaking Science Abstracts - 4171701Rajeev Pathak, Adrian Elliott, Dennis Lau, Melissa Middeldorp, Dominik Linz, John Fitzgerald, Jonathan Ariyaratnam, Varun Malik, Jean Jacques Noubiap, Rajiv Mahajan, Walter Abhayaratna, Jonathan Kalman, Prashanthan Sander
Stoic beliefs and health: Development and preliminary validation of the Pathak-Wieten Stoicism Ideology Scale
No full text© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted. Introduction We developed and validated a new parsimonious scale to measure stoic beliefs. Key domains of stoicism are imperviousness to strong emotions, indifference to death, taciturnity and self-sufficiency. In the context of illness and disease, a personal ideology of stoicism may create an internal resistance to objective needs, which can lead to negative consequences. Stoicism has been linked to help-seeking delays, inadequate pain treatment, caregiver strain and suicide after economic stress. Methods During 2013-2014, 390 adults aged 18+ years completed a brief anonymous paper questionnaire containing the preliminary 24-item Pathak-Wieten Stoicism Ideology Scale (PW-SIS). Confirmatory factor analysis (CFA) was used to test an a priori multidomain theoretical model. Content validity and response distributions were examined. Sociodemographic predictors of strong endorsement of stoicism were explored with logistic regression. Results The final PW-SIS contains four conceptual domains and 12 items. CFA showed very good model fit: root mean square error of approximation (RMSEA)=0.05 (95% CI 0.04 to 0.07), goodness-of-fit index=0.96 and Tucker-Lewis Index=0.93. Cronbach's alpha was 0.78 and ranged from 0.64 to 0.71 for the subscales. Content validity analysis showed a statistically significant trend, with respondents who reported trying to be a stoic 'all of the time' having the highest PW-SIS scores. Men were over two times as likely as women to fall into the top quartile of responses (OR=2.30, 95% CI 1.44 to 3.68, P<0.001). ORs showing stronger endorsement of stoicism by Hispanics, Blacks and biracial persons were not statistically significant. Discussion The PW-SIS is a valid and theoretically coherent scale which is brief and practical for integration into a wide range of health behaviour and outcomes research studies
Parmanu-Gunak
No full textParmanu-Gunak is a free Python based GUI application for reducing single and double spike isotope dilution data.
Version 1.0
Please contact the author at [email protected] for any questions related to Parmanu-Gunak. If you use Parmanu-Gunak for your data reduction, then please cite the following paper:
Pathak, D. (2023), Parmanu-Gunak: Data Reduction Software for Isotope Dilution Analysis. Geostand Geoanal Res. https://doi.org/10.1111/ggr.12476
</p
Satellite-retrieved direct radiative forcing of aerosols over North-East India and adjoining areas: climatology and impact assessment
No full textThe article by J. Biswas et al. contained an update in affiliation of author Binita Pathak. The author would like to add another affiliation to her name. Her updated affiliations are the following
Social entrepreneurship, governmentality & the Left
No full textThis paper offers a critique of the location of social entrepreneurship in the imaginaries of an advanced liberal social economy . Social entrepreneurship is used in a broad sense to refer to innovative, sustainable solutions to social problems, and this paper is agnostic towards organisational structures or the use of earned income which might be understood to circumscribe the practice of social enterprise. This chapter therefore, rejects Reiss’ (1999,1) assertion that social entrepreneurship refers simply to the “application of sound business practices to the operation of non-profit organizations” and is closer to the social innovation school of thought advocated by Dees & Anderson (2006). By doing so, the author asserts the need for nation states to take an active role through policy innovation and the co-ordination of the social economy
Analysing spatial interdependence among the 2011 Thailand flood-affected small and medium enterprises for reduction of disaster recovery time period
No full textThe authors would like to acknowledge the continuous support and
guidance of the colleagues and family members.
The author would like to acknowledge the constant support and guidance
from Anila Pathak, Nupur Chaturvedi, Meleana Chaturvedi and Aaryana
Pathak.
ORCID: 0000-0002-2750-8483 (Shubham Pathak).Natural disasters have been a significant hurdle in the economic growth of middle-income developing countries. Thailand has also been suffering from recurring flood disasters and was most which are severely affected during the 2011 floods. This paper aims to identify the various factors that impact the speed of disaster recovery among the Small and Medium Enterprises (SMEs) severely affected by the floods in Pathumthani province in central Thailand, and how it is related to its speed decision of neighbours SMEs. The methodology adopts a spatial econometric model, to analysis and understand each of the chosen factors' impact. The findings include the impact of disaster resilience, mitigation and planning at the SME level as well as the government level. The absence of accurate perception of actual risk, flood insurance and disaster management planning before the 2011 floods had contributed to the severity of the impacts during the 2011 floods
On Hankel Transformable Spaces and a Cauchy Problem
No full textThe classical Hankel transform of a conventional function ϕ on (0, ∞) defined formally bywas extended by Zemanian [21-23] to certain generalized functions of one dimension. Koh [9, 10] extended the work of [21] to n-dimensions, and that of [22] to arbitrary real values of μ. Motivated from the work of Gelfand and Shilov [6], Lee [11] introduced spaces of type Hμ and studied their Hankel transforms. The results of Lee [11] and Zemanian [21] are special cases of recent results obtained by the author and Pandey [14]. The aforesaid extensions are accomplished by using the so-called adjoint method of extending integral transforms to generalized functions. Dube and Pandey [2], Pathak and Pandey [15, 16] applied a more direct method, the so-called kernel method, for extending the Hankel and other related transforms.
</jats:p
Heavy Oil and Bitumen Recovery by Hot Solvent Injection: An Experimental and Computational Investigation
No full textAbstract
Thermal and miscible methods are commonly used for in-situ recovery of heavy oil and bitumen. Both techniques have their own limitations and associated shortcomings, often times yielding an inefficient process. The most common thermal method is steam injection, which is highly energy intensive. Steam generation costs and water production affect the economics of the thermal technique adversely. On the other hand, miscible methods are energy effective but their economics depends on the solvent retrieval. Various combinations of these two techniques such as co- or alternate injection of steam and solvent have been proposed as a solution, but no optimum method has yet been developed.
Thermal and miscible methods can be combined by co-injecting solvent with steam or injecting solvent into a pre-heated reservoir. Current work was undertaken to study the performance of solvents at higher temperatures for heavy oil/bitumen recovery. Glass bead packs and Berea sandstone cores were used in the experiments to represent different types of pore structures, porosity and permeability. After saturating with heavy oil, the samples were exposed to the vapor of paraffinic solvents (propane and butane) at a temperature above the boiling point of the solvent, and a constant pressure of 1500 kPa. A mechanical convection oven was used to maintain constant temperature across the setup. The setup was designed in such a way that a reasonably long sample (up to 30 cm) can be tested to analyze the gravity effect. The oil recovered from each of these experiments was collected using a specifically designed collection system and analyzed for composition, viscosity and asphaltene content.
The amount of oil recovered in each case was also analyzed and the quantity and nature of asphaltene precipitated with each of the tested solvents under the prevailing temperature and pressure of the experiment was reported. It was observed that recovery decreased with increasing temperature and pressure of the system for both the solvents, and that the best results were found when experimental temperature is only slightly higher than the saturation temperature. It was also noticed that butane diluted the oil more than propane which resulted in lower asphaltene content and viscosity of oil produced with butane as a solvent.
To understand the mechanics of the process and to explain the observations of these experiments, additional experiments were done on tighter samples of different sizes, along with numerical simulation and visualization experiments. The effects of temperature and pressure on the recovery were studied using a commercial reservoir simulator. Propane, butane and pentane were used as solvents. Asphaltene precipitation was also modeled.
To investigate the phenomenon further, 2-D glass beads packed models and Hele-Shaw cells were constructed, saturated with heavy-oil, and exposed to different types of solvents. The setup was continuously monitored to observe fluid fronts and asphaltene precipitation. The images were used in history matching to numerical models by mainly considering the permeability reduction due to asphaltene precipitation and the extent of interaction between solvent and oil phase.
Using this analysis, the mechanics of the process was clarified from the effect of solvent type on the recovery process point of view. The optimum solvent concentration and optimum operating temperature for hot solvent process were also identified.</jats:p
Hot solvent injection for heavy-oil and bitumen recovery
No full textThis research was undertaken to study the performance of paraffinic solvents at higher temperatures for heavy oil/bitumen recovery. Heavy oil or bitumen saturated glass bead packs, Berea sandstone and carbonate cores were used in the experiments to represent different types of pore structures, porosity and permeability.
Final recovery and the quantity of asphaltene precipitated in each experiment were reported. It was observed that recovery decreased with increasing temperature and pressure of the system and that the best results were obtained when the experimental temperature is slightly higher than the solvent saturation temperature. It was also noticed that butane diluted the oil more than propane.
Furthermore, numerical simulation was conducted using a commercial simulator including asphaltene precipitation option. Visualization experiments were also carried out using 2-D Hele-Shaw models to observe the effect of asphaltene precipitation on the dynamics of the process.
Using this analysis, the mechanics of the hot solvent process was clarified and the impact of temperature, pressure, asphaltene deposition, permeability and solvent type on recovery were quantified
Effects of dapagliflozin and liraglutide on metabolic control and cognition in high fat fed mice
No full text- …
