Lahore University of Management Sciences

About: Lahore University of Management Sciences is a education organization based out in Lahore, Pakistan. It is known for research contribution in the topics: Fixed point & Metric space. The organization has 1524 authors who have published 3015 publications receiving 42665 citations. The organization is also known as: LUMS.

Fixed point of generalized weakly contractive mappings in ordered partial metric spaces

Abstract: In this article, we prove some fixed point results for generalized weakly contractive mappings defined on a partial metric space. We provide some examples to validate our results. These results unify, generalize and complement various known comparable results from the current literature. AMS Classification 2010: 47H10; 54H25; 54E50.

In defense of orthonormality constraints for nonrigid structure from motion

Abstract: In factorization approaches to nonrigid structure from motion, the 3D shape of a deforming object is usually modeled as a linear combination of a small number of basis shapes. The original approach to simultaneously estimate the shape basis and nonrigid structure exploited ortho-normality constraints for metric rectification. Recently, it has been asserted that structure recovery through ortho-normality constraints alone is inherently ambiguous and cannot result in a unique solution. This assertion has been accepted as conventional wisdom and is the justification of many remedial heuristics in literature. Our key contribution is to prove that ortho-normality constraints are in fact sufficient to recover the 3D structure from image observations alone. We characterize the true nature of the ambiguity in using ortho-normality constraints for the shape basis and show that it has no impact on structure reconstruction. We conclude from our experimentation that the primary challenge in using shape basis for nonrigid structure from motion is the difficulty in the optimization problem rather than the ambiguity in ortho-normality constraints.

The impact of human capital efficiency on Latin American mutual funds during Covid-19 outbreak

Abstract: The mutual funds’ returns, inter alia, are dependent on fund managers’ performance. This makes human capital efficiency very central for consistent risk-adjusted performance. The persistence in performance becomes more critical during periods of high turbulence, like the one we are experiencing amidst the outbreak of Covid-19. In this research, we attempt to evaluate the performance of equity funds in massively impacted Latin American countries. These equity funds, with 95% of their investment in the infected region, are ranked as per their human capital efficiency using 2019 as the base year. Our findings demonstrate that funds with higher human capital efficiency significantly outperform their counterparts that rank lower on human capital efficiency. These findings remained consistent for the sub-periods that we specify to map the evolution of Covid-19. We conclude that equity funds should enhance their human capital efficiency to endure resilience amid macroeconomic shocks.

Photocatalytic degradation of textile dyes on Cu2O-CuO/TiO2 anatase powders

Abstract: TiO 2 anatase photocatalysts with ca. 2, 4 and 8 wt.% copper metal loading have been employed for the photocatalytic degradation of textile dyes (one of the major contaminants in effluent from textile industries around the world) and their degradation efficiencies compared with benchmark Degussa P25. In order to investigate their surface and bulk composition, all catalysts were characterized using XRD, UV–vis, XPS and TEM techniques. TEM and XPS results confirmed the presence of Cu in its oxide form (Cu 2 O-CuO). Under optimized conditions (i.e. catalyst dose of 125 mg L −1 and initial dye concentration of 5 mg L −1 ), Degussa P25 showed 76% degradation efficiency for primary reactive blue 49 (RB 49) dye in 80 min. However, under the same optimized conditions, a complete primary RB 49 dye removal was observed at ca. 4 wt.% Cu 2 O-CuO/TiO 2 catalyst. Kinetics analysis of photodegradation ( k d ) nearly followed a pseudo-first-order kinetic model with a regression coefficient (R 2 ) value in the range of 0.97–0.86 for 4 wt.% Cu 2 O-CuO/TiO 2 catalyst. These results indicate that non noble supported TiO 2 anatase may be a better choice for photocatalytic dye degradation as compared to other commercially available photocatalysts.