A massive pleural-based tumour: The challenge of diagnosis

AbstractLiposarcomas of the mediastinum and chest wall have been previously described; however, primary pleural liposarcoma is extremely rare.We report an exceedingly rare case of a well-differentiated sclerosing pleural liposarcoma in a 47-year-old male that was resected. We emphasise the importance of careful inspection of the origin of these tumours to allow accurate diagnosis

Surface Debye Temperature Measurement with Reflection High-Energy Electron Diffraction

Measurement of the surface mean-square atomic vibrational amplitude, or equivalently the surface Debye temperature, with reflection high-energy electron diffraction is discussed. Low-index surfaces of lead are used as examples. Particular details are given about the temperature-dependent diffraction pattern of Pb(100) in the Debye-Waller region. The use of reflection high-energy electron diffraction for measurement of the substrate surface temperature in thin-film deposition chambers is suggested. © 1996 American Institute of Physics

Solutions of Some Difference Equations Systems and Periodicity

In this article, analysis and investigation have been conducted on the periodic nature as well as the type of the solutions of the subsequent schemes of rational difference equations with a nonzero real numbers initial conditions

Temperature Dependence of Step Density on Vicinal Pb(111)

The temperature dependence of step density on the vicinal Pb(111) surface is investigated using reflection high-energy electron diffraction. When the temperature is increased from 323 to 590 K. the average terrace width and the average string length at the step edge decrease from 85±25 to 37±16 Å and from 220±33 to 25±8 Å, respectively. Thermal step collapse on the Pb(111) surface near its bulk melting temperature is not observed. Above 530±7 K, the change in the string length at the step edge with temperature becomes small, and the intensity of the (00) beam is significantly decreased. We conclude that partial step melting at the step edge occurs at the surface above 530±7 K

Reflection High-Energy Electron-Diffraction Study of Surface Disorder and Anomalous Expansion of Pb(100)

The temperature-dependent surface structural behavior of Pb(100) is studied using reflection high-energy electron diffraction. Anomalous surface expansion for temperatures between room temperature to about 500 K is observed. A high density of surface vacancies appears at temperatures above ~ 500 K. © 1994 The American Physical Society

Connexin 26 (GJB2) mutation in KID syndrome: An Egyptian patient

Keratitis ± ichthyosis ± deafness (KID) syndrome is a rare disorder characterized by the occurrence of localized erythematous scaly skin lesions, severe bilateral keratitis, and sensorineural deafness. Other ocular manifestations include corneal epithelial defects and scarring, whichcause progressive decline of visual acuity and may eventually lead to blindness. To our knowledge, few cases have been reported worldwide and none were reported from the Middle East Arab countries. Here we report the first Egyptian patient with this syndrome

The Nile Water Food and Energy Nexus Model

This is the author accepted manuscript.The Water, Food and Energy (WFE) Nexus is a useful concept to address the interlinkages among these resources on which we depend to achieve socio-economic and environmental goals in a sustainable way. WFE are interconnected in different ways and an action in one sector would not only affect that but could have significant impacts on the other sectors. The Nile basin is a transboundary river which is currently challenged by rapid population and economic growth that sparked development plans aimed at meeting growing demands for WFE. Currently, water, food and energy are still managed separately and there is a little attention given to the interactions between the WFE and socio-economic drivers and the potential for a transboundary cooperation on WFE matters in the Nile basin. A System Dynamics Modelling (SDM) approach is proposed for this study as it: (a) provides a unique framework to address the interlinkages among subsystems in a complex dynamic system, and (b) has the ability to capture the dynamic feedback between system components. A water balance for the entire Nile basin is integrated with the food, energy, population and economic sectors in Egypt. The underlying structure of each submodel was presented. The calibration and the model simulations results were presented, and the model showed a satisfactory performance

Time-Resolved Structural Study of Low-Index Surfaces of Germanium Near Its Bulk Melting Temperature

The structure of the low-index surfaces of germanium near its bulk melting temperature is investigated using 100-ps time-resolved reflection high-energy electron diffraction. The surface is heated by 100-ps laser pulses while a synchronized electron beam probes the structure. Ge(111)was observed to remain in its incomplete melting structure up to at least Tm + 134 ± 40 K when heated by a 100-ps laser pulse. Both the Ge(100) and Ge(110) surfaces are observed to melt near the bulk melting temperature when heated with 100-ps laser pulses. Because of the low-diffraction intensity-to-background ratio at high temperatures and because of the temperature uncertainty in the time-resolved experiments, we are unable to accurately identify the melting point of Ge(100) and Ge(110) when heated with a 100-ps laser pulse. The results, however, favor the lack of surface superheating of Ge(100) and, to some extent, Ge(110). The superheating of the incomplete melting state of Ge(111) could be due to the metallization of the top germanium bilayer and its interaction with the solid underneath causing an energy barrier sufficient to allow for transient surface superheating