419 research outputs found
Erratum: Cloaking using anisotropic multilayer circular cylinder (AIP Advances (2020) 10 (095312) DOI: 10.1063/5.0012769)
No full textCo-author Mehwish Nisar should have had an additional affiliation noted in the byline of our original manuscript.1 The correct affiliations for this manuscript are as listed above
Investor influence in portfolio company growth and development strategy
No full textThe author empirically investigates these ideas, especially how investors, through a network of contacts, affect portfolio company growth and development
Optical properties of ZnS and effect of doping with transition elements
No full textBy the help of density functional theory for a Cu doped ZnS compound the charge density,
Fermi surface and electronic structure have been examined. We have used (FP-LAPW)
method, to deal with interchange relationship potential for solving of kohn-sham equations.
We apply generalized gradient approximation (GGA), local density approximation (LDA)
and Engel-Vosko GGA (EVGGA). Cu doped ZnS compound confirms that nature of
material is metallic and Fermi energy (EF) is obtained by the overlapping of Cu-p and Zn-
d state. At Fermi energy (EF) calculated density of states is 51.932, 18.655 and 13.235
states/ev, and low-temperature electronic specific heat co-efficient (γ) is found to be
9.008mJ/mol-K2 for GGA, 3.236mJ/mol-K2 for LDA, and it was 2.295mJ/mol-K2 for
EVGGA respectively. The thermal properties and optical constant were also discussed and
calculated
Improvement of Early-Age Mechanical Properties of Cement Mortar by Adding Biochar of the Santa Maria Feverfew Plant
No full textThis study focused on the application of nano-/micro-sized fibers obtained from pyrolysis of Santa Maria feverfew (biochar) in cement mortars. The biochar was added in amounts of 0, 0.05 and 0.1 percent by mass of cement. The mechanical characteristics were determined after 3 and 7 days and matched with those of the control samples. The compressive strength remained unchanged with the biochar addition, whereas the flexural strength increased. Biochar is a carbon-rich material, and its use in building materials leads to carbon sequestration, which is in accordance with the sustainable development goals of the UNO
Mapping the disaster : global prediction and the medium of ‘digital earth’
No full textThis paper explores the mapping of disaster in digital prediction models. Concentrating on the imminent disaster of climate change, the author asks how global digital models can be expanded to incorporate a wild nature and wild data. This theme is considered through an examination of the ‘nature’ of disaster and its reportage, GISs and their extension into physical space, the language of climate change, and the role of digital machines in these experiments with climate. The author concludes with an examination of expanded forms of mapping to suggest possible reconfigurations of the terms of the disaster
Compaction performance analysis of alum sludge waste modified soil
No full textSustainable construction is one of the ultimate requirements of the engineering field. Addition of waste materials not only contribute to the improvement of the density of soils but also help in the enhancement of its strength properties. In the field, compaction is achieved by compactors and rollers, which consumes a lot of energy for this purpose. In this study, two methods related to compaction energy have been applied to study the relation of compaction energy with the strength of soil before and after addition of alum sludge as a soil stabilizer. An advanced Artificial Neural Networks (ANN5) technique has been applied with reference to the addition of alum sludge percentage, plasticity index, specific gravity, optimum moisture content, maximum dry density, AASHTO classification, USCS classification, and group index. It was found that soil strength can be improved even at a low compaction energy level of 600KN-m/m(3) by the addition of optimum percentage of 8% alum sludge as a soil stabilizer. So, roller compaction effort can also be reduced by addition of this soil stabilizer to save compaction cost i.e. saving of roller fuel consumption and rental cost as well. This study will not only help in environment-friendly construction but will also manage finance by utilization of optimum compaction energy in the mega projects.Shah, SAR (reprint author), Pakistan Inst Engn & Technol, Dept Civil Engn, Khanewal Rd, Multan 60000, Pakistan.
[email protected]
Polarimetric calibration of spaceborne and airborne multifrequency SAR data for scattering-based characterization of manmade and natural features
No full textThe Polarimetric Synthetic Aperture Radar (PolSAR) systems use electromagnetic radiations of different polarizations in the microwave frequency to collect the scattering information from targets on the Earth. Nevertheless, as with any other electronic device, the PolSAR systems are also not ideal and subjected to distortions. The most important of these distortions are the polarimetric distortions caused due to the channel imbalance, phase bias, and crosstalk between the different polarization channels. For the spaceborne PolSAR systems, the Earth's ionosphere also contributes to an additional polarimetric distortion known as the Faraday rotation. An effort was made in this study to perform the polarimetric calibration of the Quad-pol and Compact-pol PolSAR datasets acquired using different airborne and spaceborne PolSAR systems to estimate and minimize these polarimetric distortions. The investigation was also done to analyze the impact of these polarimetric distortions on the scattering mechanisms from ground targets and on its dependency on the radar wavelength. The study was done using the UAVSAR L-band Quad-pol dataset, RADARSAT-2 Quad-pol dataset, ALOS-2 PALSAR-2, ISRO's L&S- Band Airborne SAR (LS-ASAR) Quad-pol and Compact-pol datasets, and the RISAT-1 Compact-pol dataset. Calibration of the airborne PolSAR data was carried to understand the level of polarimetric distortions in the LS-ASAR product that is a precursor mission to the spaceborne Dual-Frequency L&S Band NASA-ISRO Synthetic Aperture Radar (NISAR) mission. It is understood that the crosstalk is the dominant polarimetric distortion, which severely affects the PolSAR datasets compared to the other polarimetric distortions, and it is more for the higher wavelength PolSAR systems. The Quegan, Improved Quegan, and Ainsworth algorithms for crosstalk estimation and minimization was performed for the different Quad-pol datasets and it was found that the Improved Quegan algorithm is suitable for removing crosstalk from datasets having high crosstalk and the Ainsworth algorithm is suitable for removing crosstalk from datasets having low crosstalk. The Freeman method of the polarimetric calibration was implemented for the compact-pol datasets and it was able to considerably minimize the polarimetric distortions. The coherency matrix, scattering matrix, model-based decomposition, polarimetric signatures, and roll invariant parameter-based analysis revealed that all the datasets after polarimetric calibration were showing the correct scattering responses expected from the ground targets.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Mathematical Geodesy and PositioningPhysical and Space Geodes
Hydraulic simulations to evaluate and predict design and operation of the Chashma Right Bank Canal
No full textIrrigation systems / Irrigation canals / Flow control / Velocity / Canal regulation techniques / Hydraulics / Simulation models / Design / Operations / Crop-based irrigation / Distributary canals / Water delivery / Policy / Protective irrigation / Water allocation / Water requirements / Sedimentation / Water distribution / Equity / Water conveyance / Pakistan / Chashma Right Bank Canal
TINJAUAN YURIDIS PUTUSAN GUGATAN PERKARA NOMOR 1746/PDT.G/2023/PA.MLG
No full textThe background for writing the final assignment is to fulfill the requirements for passing the CoE internship. And also this writing was written as material to meet the graduation standards for obtaining a Bachelor of Laws degree. The purpose of writing is to find out the implementation of what has been mandated by the constitution, namely that Indonesia is a country of laws, the law must touch all aspects and lines of human life and livelihood, even into the family room. This is reinforced by a legal adage which states thatthere is a company right there, which means where there is law, there is society.
The type of research used in writing this final assignment is Empirical Juridical Legal Research with an approach methodlegal partnerwhich is in the nature of legal research regarding the application or implementation of normative legal provisionsin action on each specific legal event that occurs in society to obtain research data.
The results of the research conducted by the author show how the author here plays a role in following the entire settlement process and analyzing the process in trials in the realm of civil law, namely divorce lawsuits while the author was an intern. And it can be concluded that finally the case studied by the author was decided by a panel of judges with legal considerations in accordance with the plaintiff's arguments and the evidence submitted as well as the existing legal facts so that the judge decided in verstek because the Defendant did not heed the official and proper summons during 2 (two) trials
Augmenting the Transit Capacity of Delhi by Renewal of the Sub-Urban Railway
No full textThis paper discusses the specific case of the untapped potential of the Sub-Urban Railway in Delhi. The Sub-Urban Railway, used as a passenger service during ASIAD Games of 1982, lost its relevance in due course of time. Delhi commutes primarily through various public and private modes of road-based transportation, with the Delhi Metro emerging as an lternative. Urban transportation in Delhi is facing a crisis due to long traffic jams, rising numbers of vehicles on roads, environmental pollution, waste of energy, among others. Ironically, the existing infrastructure of the Sub-Urban Railway is left unutilized, though this may well provide increased passenger capacity to the Mega-City while simultaneously addressing the concerns of environment and energy as well. The paper is based on 3-year long study by the author of the salient aspects of the Sub-Urban Railway in Delhi and also the resultant detailed proposals for the augmentation of the city’s Transport scenario
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