Influence of cenosphere on CAI strength of glass epoxy laminate

Under controlled lab settings, two distinct laminates, one containing cenosphere and the other with neat resin, were evaluated for impact using a Fractovis impact machine, compression testing, and compression after impact tests (CAI) with a Tinus Olsen UTM. The GFRP laminates were made by hand lay-up method with 16 layers of glass fiber in 4.7±0.2 mm thickness and combined with epoxy resin reinforced Cenospheres at concentrations of 1, 3 and 5 wt. %, according to ASTM specifications. The dominant failure mode controlling the specimen's compression ultimate load resistance, and other failure modes of impacted specimens such like fiber pull-out and debonding, were found to be the effects of delamination using coupled acoustic emission (AE) monitoring and compression tests. On specimens with a 3 wt. % filler additive, there was a noticeable increase in strength. Both impacted and non-impacted samples exhibited significant compression ultimate load resistances, with the 3 wt. % filler impregnated specimen having the maximum.

Primary Extraskeletal Osteosarcoma of Liver: Case of Report

BackgroundExtraskeletal osteosarcoma (ESOS) is a highly malignant osteosarcoma that occurs in extraskeletal tissues. It often affects the soft tissues of the limbs. ESOS is classified as primary or secondary ESOS. Case presentationwe report a case of primary hepatic osteosarcoma in a 76-year-old male patient. The patient had a giant cystic-solid mass in the right liver that was evident on ultrasound and computed tomography. Postoperative pathology and immunohistochemistry of the mass, which was surgically removed, suggested fibroblastic osteosarcoma. No other abnormal lesions were found. Therefore, the patient was diagnosed with primary hepatic osteosarcoma. The hepatic osteosarcoma reoccurred 48 days after surgery, resulting in significant compression and narrowing of the hepatic segment of the inferior vena cava. Consequently, the patient underwent stent implantation in the inferior vena cava and transcatheter arterial chemoembolization. Unfortunately, the patient died of postoperative multiple organ failure.ConclusionsHepatic osteosarcoma is a rare mesenchymal tumor with a short course and a high likelihood of metastasis and recurrence. If a biopsy were to return osteoid in a large liver tumor, ESOS would be suspected. However, there is no evidence-based treatment plan to date. Surgical resection combined with adjuvant chemoradiotherapy seems to be the best treatment option.

Laryngeal schwannoma with extralaryngeal extension mimicking a thyroid tumour

Objective: A schwannoma is a common benign tumour that can arise anywhere in the body. When it occurs in an unusual location such as the larynx, its differentiation from other tumours can be challenging. Herein, we report a case of a laryngeal schwannoma with extralaryngeal extension that mimicked a thyroid tumour, focusing on its characteristic features on MRI. Methods: A 19-year-old male presented with a mass in the left side of the neck and hoarseness for 2 years. Endoscopy showed a submucosal mass in the laryngeal region. MRI found a well-defined solid mass in the thyroid gland, extending to the larynx through the lower edge of the thyroid cartilage. T2 weighted MRI showed slightly low signal intensity at the central part of the tumour and high signal intensity at the peripheral part of the tumour. Pre-operative imaging suggested that the tumour originated in the thyroid gland. Left thyroidectomy with tumour excision was performed; the tumour was diagnosed as a laryngeal schwannoma with extralaryngeal extension, compressing the thyroid gland. In retrospect, features such as the dumbbell-shape and known as ‘target sign’ on T2 weighted MRI were typical features of schwannoma. Additionally, the tumour’s extension pattern was similar to previous reports of laryngeal schwannomas with extralaryngeal extension. Conclusion: A large laryngeal schwannoma may extend outside the larynx with significant compression of the thyroid gland. Understanding the pattern of extension and familiarity with the features on MRI can improve the preoperative diagnosis accuracy.

Novel hybrid framework for image compression for supportive hardware design of boosting compression

Performing the image compression over the resource constrained hardware is quite a challenging task. Although, there has been various approaches being carried out towards image compression considering the hardware aspect of it, but still there are problems associated with the memory acceleration associated with the entire operation that downgrade the performance of the hardware device. Therefore, the proposed approach presents a cost effective image compression mechanism which offers lossless compression using a unique combination of the non-linear filtering, segmentation, contour detection, followed by the optimization. The compression mechanism adapts analytical approach for significant image compression. The execution of the compression mechanism yields faster response time, reduced mean square error, improved signal quality and significant compression ratio performance.

Implementation of Lightweight Convolutional Neural Networks via Layer-Wise Differentiable Compression

Convolutional neural networks (CNNs) have achieved significant breakthroughs in various domains, such as natural language processing (NLP), and computer vision. However, performance improvement is often accompanied by large model size and computation costs, which make it not suitable for resource-constrained devices. Consequently, there is an urgent need to compress CNNs, so as to reduce model size and computation costs. This paper proposes a layer-wise differentiable compression (LWDC) algorithm for compressing CNNs structurally. A differentiable selection operator OS is embedded in the model to compress and train the model simultaneously by gradient descent in one go. Instead of pruning parameters from redundant operators by contrast to most of the existing methods, our method replaces the original bulky operators with more lightweight ones directly, which only needs to specify the set of lightweight operators and the regularization factor in advance, rather than the compression rate for each layer. The compressed model produced by our method is generic and does not need any special hardware/software support. Experimental results on CIFAR-10, CIFAR-100 and ImageNet have demonstrated the effectiveness of our method. LWDC obtains more significant compression than state-of-the-art methods in most cases, while having lower performance degradation. The impact of lightweight operators and regularization factor on the compression rate and accuracy also is evaluated.

Left renal vein stenting: indications, disputable points, immediate and long-term results

The article presents the results of stenting of the left renal vein in 35 patients with proven hemodynamically significant compression of the vein in “aorto-mesenteric tweezers”. Clinical manifestations of lesions of the left renal vein are very diverse, and pathogenetic mechanisms remain not fully understood. Therefore, the determination of indications for stenting and perfect technical performance are predictors of success in the near and long-term periods of postoperative follow-up. Our experience in stenting the left renal vein demonstrates the possibility of achieving intraoperative technical success in 100 % of cases, as well as a significant improvement in the quality of life in most patients after endovascular intervention, due to a significant reduction in the clinical manifestations of the pathological phenomenon.

Giant chondrosarcoma of the falx in an adolescent: A case report

Background: Intracranial chondrosarcomas are slowly growing malignant cartilaginous tumors that are especially rare in adolescents. Case Description: A 19-year-old woman with no medical history presented with symptoms of intermittent facial twitching and progressive generalized weakness for 6 months. The patient’s physical examination was unremarkable. Imaging revealed a large bifrontal mass arising from the falx cerebri, with significant compression of both cerebral hemispheres and downward displacement of the corpus callosum. The patient underwent a bifrontal craniotomy for gross total resection of tumor. Neuropathologic examination revealed a bland cartilaginous lesion most consistent with low-grade chondrosarcoma. Her postoperative course was uneventful, and she was discharged to home on postoperative day 3. Conclusion: This is an unusual case of an extra-axial, non-skull base, low-grade chondrosarcoma presenting as facial spasm in an adolescent patient.

An approach using Trust Management with Next-Generation IoT Networks for Healthcare, Agriculture and Sustainable Development Goals

The Internet of Things (IoT) is one of the most promising scientific fields of the last decade. The number of devices developed that support Internet things makes the application of internet things more interesting. The field of use includes the insurance sector, intelligent monitoring Environment, Smart City, sector-health care, Intelligent City, and also many other applications enabled for smart devices.The vision of the introduction of the internet, forming a network called IoT, where various information technology devices are connected, security and trust are most important for the user, because this network presumably used a large amount of data.However, trust is a significant obstacle that can hinder the growth of the IoT and even slow down the significant compression of many applications.This paper presents an approach using trust management (TM) with next-generation IoT networks for healthcare, agriculture, and sustainable development goals. Implementation of IoT conveys various problems of security and confidentiality. The use of IoT to ensure confidentiality, integrity, authentication, authorization, trust, secrecy, and management challenges are addressed. The paper uses decentralized blockchain technology to solve security and privacy issues in applications with the support of the IoT.Ethereum virtual machine is used to implement theBlockchain distributed networkand healthcare insurance claims are taken as anexample to test the proposed solution. Also, it is provided that the lessons and opinions discussed are primarily about the purpose of the trust, which can be reproduced in the future on the internet.The results show that distributed blockchain technology provides trust management and can improve the existing security and privacy of the IoT in the health and agriculture sectors, which is helpful for next-generation IoT networks.

Mathematical analysis of work aorto-mesenteric "forceps"

It is generally accepted that the diagnostic criteria for hemodynamically significant compression of the left renal vein are the anteroposterior size of the renal vein determined by ultrasound examination in the narrowed area of 1.5–2.5 mm or less. Purpose of the study: determine the features of the work of the aorto-mesenteric "forceps" on the basis of mathematical analysis. A polypositional ultrasound examination of the kidneys, renal arteries and veins was carried out in 6 positions (standing, sitting, on the back, on the stomach, on the right and left sides). The parameters of the aorto-mesenteric "forceps" (AMP) were determined on the basis of ultrasound and mathematical analysis. Research results: In different positions of the body, the velocity indicators of arterial and venous blood flow, the diameter of the renal (PV) vein in the main part, at the gate and in the AMP change. Pressure fluctuations in the left renal vein are position-dependent and are a factor influencing the work of the aorto-mesenteric forceps.

Active surgery (collapse therapy) in the treatment of pulmonary tuberculosis

Of all the currently used types of surgical intervention in the treatment of pulmonary tbc, as you know, the most common and justified are actually 3 operations: a) virtually bloodless intervention - artificial pneumothorax (pneum.), B) almost bloodless and technically easy operation - frenico -exeresis and, finally, c) bloody, serious and technically difficult operation - extensive thoraco-plasty. Despite the significant difference in the technique of these operations, they are all based on one general idea collapse therapy, that is, the desire to obtain a therapeutic effect by more or less significant compression and immobilization of the affected lung. I will not touch upon the technique and clinic of these operations here, but I will dwell briefly on the fundamental side of this method of treatment, on the essence of the action of collapse therapy (col. Ter.).