Hepatocellular carcinoma is a highly malignant neoplasm and frequently involves extrahepatic organs but decidedly rarely occurs in brain. We describe 3 cases of brain metastases in patients suffering from post-HBV hep...Hepatocellular carcinoma is a highly malignant neoplasm and frequently involves extrahepatic organs but decidedly rarely occurs in brain. We describe 3 cases of brain metastases in patients suffering from post-HBV hepatocarcinoma. The ＂stroke-like＂ presentation of the cerebral localization of the disease can be explained by both the important vascularization of the tumor and the frequent hemocoagulative alterations caused by the cirrhosis. The importance of diagnostic neuroradiology is briefly addressed, with reference to the fundamental role played by MRI. Surgery of these lesions does not present any particular technical problems as long as they are located in accessible areas and the patient＇s general and neurological conditions allow it. Postoperative radiotherapy seems to improve the quality and quantity of residual life, although the number of patients described in the literature was too small to draw any definite conclusion in this regard.展开更多
In power systems, a large number of OPLs （overhead power lines） are more than 40 years old and some even exceed 50 years old. The key issue for power systems managers, public utilities companies and electrical engin...In power systems, a large number of OPLs （overhead power lines） are more than 40 years old and some even exceed 50 years old. The key issue for power systems managers, public utilities companies and electrical engineers today concerns the manner in which available financial resources should be invested in these OPLs to provide the greatest impact on the power system as a whole and to address the OPLs that require urgent revitalization. This paper presents the application of the software tool RevOPL, developed using Microsoft Access utilizing the ＂methodology for revitalization of high-voltage OPLs＂. The aim is to present both the methodology and software to objectively evaluate the condition of an OPL and determine its remaining service life. The application of this software tool provides a proposal for the scheduling and scope of planned revitalization activities, which are obtained through the optimization of the technical characteristics while remaining within the available budget.展开更多
文摘Hepatocellular carcinoma is a highly malignant neoplasm and frequently involves extrahepatic organs but decidedly rarely occurs in brain. We describe 3 cases of brain metastases in patients suffering from post-HBV hepatocarcinoma. The ＂stroke-like＂ presentation of the cerebral localization of the disease can be explained by both the important vascularization of the tumor and the frequent hemocoagulative alterations caused by the cirrhosis. The importance of diagnostic neuroradiology is briefly addressed, with reference to the fundamental role played by MRI. Surgery of these lesions does not present any particular technical problems as long as they are located in accessible areas and the patient＇s general and neurological conditions allow it. Postoperative radiotherapy seems to improve the quality and quantity of residual life, although the number of patients described in the literature was too small to draw any definite conclusion in this regard.
文摘In power systems, a large number of OPLs （overhead power lines） are more than 40 years old and some even exceed 50 years old. The key issue for power systems managers, public utilities companies and electrical engineers today concerns the manner in which available financial resources should be invested in these OPLs to provide the greatest impact on the power system as a whole and to address the OPLs that require urgent revitalization. This paper presents the application of the software tool RevOPL, developed using Microsoft Access utilizing the ＂methodology for revitalization of high-voltage OPLs＂. The aim is to present both the methodology and software to objectively evaluate the condition of an OPL and determine its remaining service life. The application of this software tool provides a proposal for the scheduling and scope of planned revitalization activities, which are obtained through the optimization of the technical characteristics while remaining within the available budget.
