A well-known experiment demonstrates the preservation of the integrity of a certain structure in the absence of visible binding forces. Such an experiment was first described in 1842 but it still has not found a scientific explanation. However, an interest in it continues unabated that is reflected in Internet publications. Based on the solution of Maxwell\'s equations, this theoretical work shows that the experiment is explained by the conservation of electromagnetic energy inside the structure and the appearance of a standing electromagnetic wave. Based on this solution, it is shown that the structure can be made not only on the basis of ferromagnetics (known fact) but also in the form of a capacitor. It is also shown that the keeper may have a different shape. It is shown further that such designs can save not only energy but also information. This fact provides a basis for explaining such phenomena as the mirages of the past. These phenomena are astounding and await their rigorous scientific explanation. The article notes that mirages do not change their position on the ground. It is further shown that the stability of the position of the mirage can be explained by the fact that in the mirage area there are a standing electromagnetic wave, pulsating flow of electromagnetic energy, and pulsating electromagnetic mass. The center of mass does not change position. Therefore, the volume of the keeper can be considered as the volume of the pulsating mass with a constant center of gravity. This mass is held in place by gravity and does not interact with the material mass, i.e. cannot be shifted by air flow. This ensures a stable position of the keeper on the ground.

Implementing computational boundary conditions such as perfectly matched layers (PML) does have advantages for forwarding modeling of the Earth’s crust. The mathematical modeling of many physical problems encountered in industrial applications often leads to a set of linear partial differential equations, PDEs. It considerably improves the visualization of seismic events relevant to oil and gas exploration. In this work, we present an efficient numerical scheme for hyperbolic PDEs, where a computational technique takes care of reflections at the borders domain using a linear twodimensional (2-D) elastic-wave system of decoupled equations with PML-type boundary conditions. The key idea is to introduce a layer that absorbs the reflections from the borders improving images’ visualization. Anisotropy has been reported to occur in the Earth’s three main layers: the crust, mantle, and core. However, this implementation refers to the case of a vertical transversal anisotropic medium (VTI) in the crust-layer. Images and screen-shots of the longitudinal (P) impulse-response and the transverse (SV) impulse-response are obtained at deferent times. This computational method enables us to achieve images for the P and SV response-impulses, and to obtain high quality synthetic seismograms for the PP and PS reflection events in a 2-D VTI two-layer model.

This study examined histopathological alterations in the gills, fillet and liver of Hemichromis fasciatus in Igun reservoir (located in an abandoned goldmine area) compared to those of Opa reservoir. Life fish species were collected from Opa and Igun reservoirs and identified in the laboratory. Techniques based on histological analyses were done on the organs and photomicrographs taken using digital binocular compound LED microscope. Epithelial lifting and hypertrophy of lamellae were observed in the gills of H. fasciatus in Opa reservoir compared to rupture of gill epithelium, rupture of chloride cell, fusion, hyperplasia, curling of lamellae in H. fasciatus of Igun reservoir. The fillet of H. fasciatus in Opa and Igun reservoirs revealed splitting and atrophy of muscle bundles. Also, parasite cyst and necrosis was observed in the fillet of H. fasciatus of Igun reservoir compared to degeneration in muscle bundles in the fish of Opa reservoir. Similarly, the liver of H. fasciatus in Igun and Opa reservoirs showed splitting at the wall of central vein, hepatopancreas and liver cells degeneration. Moreover, nucleus hypertrophy were also identified in the liver of H. fasciatus in Opa reservoir compared to vascular congestion in the central vein, bile duct, portal vein and portal artery of H. fasciatus in Igun reservoir. The study therefore concluded that H. fasciatus specimens in Igun reservoir are histopathologically unhealthy compared to those of Opa reservoir.

Checklists about parasites of economically important fishery species at either one and/or many parts of the globe are available in (relevant) scientific literature. However, recent/up-to-date checklist about parasite of mullidsspecific to Mediterranean Sea seems not available. Thus, thespecific objective of present study was to produce a checklist from published records about (macro) parasites of two Mullus spp. fish species, namely: Mullus barbatus (Red Mullet) and Mullus surmuletus (Striped Red Mullet) of Mediterranean Sea. Google Scholar served as the primary search engine to acquire all relevant literature. Scientific name(s) of fish parasites were checked (and crosschecked) via World Register of Marine Species (WoRMS). Results showed four different parasite phyla namely: Platyhelminthes, Nematoda, Acanthocephala and Crustacea, within the Mediterranean Sea. Platyhelminthes was represented by 35 species, Nematoda by 16 species, Acanthocephala by 6 species and Crustacea by 5 species. Composition of parasite fauna demonstrated the importance of these two mullids species as final host of parasites of piscivorus fish. Overall, this checklist provides an update of parasites phyla/species richness - feasibly the first research step into studying the phyla of such parasite(s).

The very long-standing problem of sound waves propagation in fluids is reexamined. In particular, from the analysis of the wave damping in reacting gases following the work by Einstein (1929), it is found that the damping due to the chemical reactions occurs nonetheless the second (bulk) viscosity introduced by Landau and Lifshitz (1987) is zero. The simple but important case of a recombining Hydrogen plasma is examined.

This research investigated the MHD Convective Flow of Jeffrey Fluid in a Parallel Permeable Moving Plate. The formulated partial differential equations were solved using perturbation technique and velocity and temperature profiles are obtained. Numerical simulation was done out using Mathematica 10.3 and the study of the flow with some physical parameters such as Gr, Pr,M,Da and other pertinent parameters Q, A,?,?,? influence on the velocity and temperature profiles. It was observed that the variation of the pertinent parameters influences the flow profiles, as it leads to increasing velocity profile with parametersDa,Gr,up,e.

Ruddy Breasted Crake (Porzana fusca) is a widely distributed Species reported from Punjab and KPK already, but it was not recorded form Sindh. The current study reported its occurrence in Sindh at Lungh Lake which is a Wildlife Sanctuary supporting the largest number of waterbirds in Sindh during the migratory season. During the present survey March and April, 2019, 51 avian species were recorded in this area along with Ruddy Breasted Crake which has not been reported previously from Sindh