Search

In engineering and transportation, beams are frequently utilized as structural elements for both static and dynamic loads. This paper focuses on a smart structure method that incorporates ANSYS software for modeling and simulation. Piezoelectric transducers are employed for actuation and sensing throughout the structure. The governing equation of a finite element that converts the mechanical energy of the structure into the electric energy of the piezoelectric material is derived using Hamilton's principle. Debonding of piezoelectric sensors/actuators is caused by structural alterations in sandwich beams, and this leads to a notable fluctuation in both static and dynamic responses. It has been shown that Finite Element Modeling with ANSYS software yields accurate numerical solutions over a broad range of related parameters. The results are displayed and vibration modes are animated by utilizing the graphical post processing capabilities. It has been observed that the material and structural alterations are what cause the increase in natural frequencies. With an input of 1 V, the load is adjusted between 0 and 5000 Hz for every material configuration.

The RADARSAT Constellation Mission (RCM) is a Canadian Synthetic Aperture Radar (SAR) mission, providing C-band SAR data continuity of the RADARSAT-1 and RADARSAT-2 satellite missions. The RCM which was recently launched (June 2019) will provide compact polarimetry (CP) as a polarization option for all non-quad-polarization imaging modes. Maritime pollution monitoring is one of the RCM core applications. Thus, the purpose of this study is to provide an initial evaluation of the expected potential of the RCM mission for maritime pollution monitoring. Herein, we investigate simulated CP SAR data of three RCM Medium Resolution (MR) SAR modes for oil slick detection and discrimination from lookalike (LA) features. Results of our study indicated that the steeper radar incidence angle seems to be preferable for oil slick detection in all examined modes. The ScanSAR 50 m resolution (SC50M) mode showed the highest overall performance in terms of LA and Emulsion (EM) classification (95.4%). This was also valid for LA and Crude Oil (CO) classification (96.7%). The performance of the SC50M mode was slightly higher than that of the ScanSAR 30 m resolution (SC30M) mode.

Documentation is a significant mechanism to prove one’s identity. Palestinians, being robbed of this privilege to document their history, have taken upon other creative means to prove their existence. Being instruments of resistance, graphics and comics have a historical prominence in the Palestinian community. Building on this rich history of resistance through art, the paper contends that the modern graphic novel is used as a tool by the author to reclaim the Palestinian identity by drawing their rootedness in the region, thus resisting their effacement from public memory.

Aim of this study to investigate the thermal and morphological behaviour of different types of biomass feedstock. For investigation of thermal behaviour we used thermo-gravimetric (TG) analysis and derivative thermo-gravimetric (DTG) analysis. The biomass feedstocks were conceded out under vigorous conditions using nitrogen gas at specific heating rates to gradient the temperature from 25°C to 1000°C. The derivative thermo-gravimetric (DTG) results show that thermal decomposition on these feedstocks. First-order reaction model were used to determine the kinetics parameters for the pyrolysis of biomass wastes. This study used Field Emission Scanning Electron Microscopy (FE-SEM) to observe surface morphology properties of the different biomass wastes. The FE-SEM images showed that clearly retained the fibrous structures in the biomass wastes and were rich in macro-pores.

We read with interest the report by Yadav and Gupta describing a case of bilateral synchronous presentation of spermatocytic seminoma in a middle aged Indian male. Considering the malignant tumor as a rare entity, we highlight the inaccuracies in the report, and the need for adequate radiographic imaging and intra/post-operative histopathological findings to ascertain this case as a bilateral synchronous presentation of spermatocytic seminoma.

In response to the article published by Koppad and colleagues in the Pan African Medical Journal on bilateral synchronous presentation of spermatocytic seminoma, the authors present their data following a comprehensive literature review to unveil the magnitude of bilateral presentation (synchronous and sequential) of this unique variant of testicular tumor.

Nevoid acanthosis nigricans is a rare variant usually presents as a localized hyperpigmented velvety plaque at birth or before puberty. However, unlike other variants, it is neither localized to the neck or flexures nor associated with metabolic disturbances, syndromes, drug toxicity, endocrinopathy or malignancy. Only a few cases of nevoid acanthosis nigricans have been reported in the literature. This 17-year-old male presented with a gradually progressive hyperpigmented, velvety plaque of nevoid acanthosis nigricans over the midline of the abdomen having a late onset.