Electrocardiographic changes in Emphysema

Chronic obstructive lung disease(COPD),predominantly emphysema,causes several thoracic anatomical and hemodynamic changes which may cause changes in various electrocardiographic parameters.A 12-lead electrocardiogram(ECG),which is often a part of routine evaluation in most clinical settings,may serve as a useful screening modality for diagnosis of COPD or emphysema.Our current article aims to provide a comprehensive review of the electrocardiographic changes encountered in COPD/emphysema utilizing published PubMed and Medline literature database.Several important ECG changes are present in COPD/emphysema and may serve as a good diagnostic tool.Verticalization of Pvector,changes in QRS duration,pattern recognition of precordial R-wave progression and axial shifts can be considered some of the most valuable markers among other changes.In conclusion,12-lead surface electrocardiogram can serve as a valuable tool for the diagnosis of COPD and/or emphysema.An appropriate knowledge of these ECG changes can not only help in the diagnosis but can also immensely help in an appropriate clinical management of these patients.

Simultaneous breast and ovarian metastasis from gallbladder carcinoma

BACKGROUND:Gallbladder carcinoma is a common malignancy in the Indian subcontinent.It commonly metastasizes through lymphatics,direct invasion,and hematogenous spread.A common extra-abdominal site of metastasis is the lungs.Simultaneous metastasis to breast and ovary is extremely rare.METHOD:This report describes an unusual case of carcinoma gallbladder metastasizing to the breast and ovary at the same time.RESULTS:A 45-year-old woman came to us with complaints of flatulent dyspepsia associated with weight loss and anorexia.Ultrasound of the abdomen revealed hepatomegaly with thick-walled gallbladder with multiple stones and a mass at the fundus,but normal uterus and ovary.Contrast-enhanced computer tomography of the abdomen showed a gallbladder mass infiltrating the liver parenchyma.The patient underwent radical cholecystectomy.Histopathological examination revealed a poorly-differentiated adenocarcinoma with margins free from tumor infiltration.One month after surgery she developed a breast lump.Ultrasound of the abdomen for metastatic workup revealed an ovary mass.Simple mastectomy and salphingo-opherectomy were performed,and histopathological examination revealed a metastatic adenocarcinoma.The patient is now on chemotherapy with gemcitabin.CONCLUSION:This is an unusual case of carcinoma of the gallbladder with metastasis to the breast and ovary,which has not been documented before.

End-to-end differentiability and tensor processing unit computing to accelerate materials’ inverse design

Numerical simulations have revolutionized material design.However,although simulations excel at mapping an input material to its output property,their direct application to inverse design has traditionally been limited by their high computing cost and lack of differentiability.Here,taking the example of the inverse design of a porous matrix featuring targeted sorption isotherm,we introduce a computational inverse design framework that addresses these challenges,by programming differentiable simulation on TensorFlow platform that leverages automated end-to-end differentiation.Thanks to its differentiability,the simulation is used to directly train a deep generative model,which outputs an optimal porous matrix based on an arbitrary input sorption isotherm curve.Importantly,this inverse design pipeline leverages the power of tensor processing units(TPU)—an emerging family of dedicated chips,which,although they are specialized in deep learning,are flexible enough for intensive scientific simulations.This approach holds promise to accelerate inverse materials design.

再见,主板!你好,硅直连结构!

长期以来,人们对硬件系统小型化和其他系统大型化的要求越来越高,成为电子产品创新的驱动力。从笔记本电脑到智能手机,再到智能手表、耳戴式设备和其他“看不见的”电子产品的演变过程中,我们即可以看到一些硬件系统小型化的发展。而其他系统大型化的要求则定义了如今商业数据中心,这些兆瓦级的能耗大户塞满了世界各地那些为特定目的而建造的仓库。