Three cases of transient proximal small bowel angioedema induced by intravenous administration of nonionic iodinated contrast media (CM) are presented.Computed tomography (CT) images in the venous phase displayed the ...Three cases of transient proximal small bowel angioedema induced by intravenous administration of nonionic iodinated contrast media (CM) are presented.Computed tomography (CT) images in the venous phase displayed the proximal small bowel with circumferential thickening of the wall including the duodenum and proximal segment of the jejunum.The bowel wall was normal in non-enhanced images,and normal or inconspicuous in arterial phase enhanced images.In one of the three cases,the bowel wall was thickened in venous phase but disappeared in the 40 s delayed phase images.No filling defect was seen in the lumen of the superior mesenteric artery and vein.No peritoneal effusion or mesentery abnormality was found.Each of these patients reported only mild abdominal discomfort and recovered without specific treatment within a short time.Only one patient suffered mild diarrhea after scanning which had resolved by the following day.The transient anaphylactic small bowel angioedema due to intravenous iodinated contrast media was easily diagnosed based on its characteristic CT findings and clinical symptoms.Differential diagnosis may include inflammatory and ischemic bowel disease,as well as neoplasms.A three-phase CT protocol and good under-standing of this disorder are fundamentally important in the diagnosis of this condition.The supposed etiology behind the transient anaphylactic reaction to intravenous administration of iodinated CM in small bowel is similar to other CM-induced hypersensitive immediate reactions.The predilection location of transient anaphylactic bowel angioedema is the small intestine,particularly the proximal segment.A speculated cause may be the richer supply of vessels in the small intestine,ample mucous folds and loose connective tissue in the duodenum and the jejunum.展开更多
In this 21 st century, whether we like it or not, it is very clear that the Intemet, social media, and all ad of the related technology have come to stay. This new technological discovery has brought great and wonderf...In this 21 st century, whether we like it or not, it is very clear that the Intemet, social media, and all ad of the related technology have come to stay. This new technological discovery has brought great and wonderful benefits to our family＇s lives and relationships. However as it is always the case with any new innovations, it has its own negative side. This paper aims at investigating what actually social media is and how it translates to children, especially African children, as it relates to family and social living. Actually Internet provide benefits in areas such as cognitive and social development, it also presents risks together with opportunities for children＇s growth and development. It is common today to see children spending great quality of their time using other social websites. It is also evidenced that Interact provide benefits in the area of emotional and intellectual development and at the same time present risk as well as opportunities to children＇s development in functional and societal challenges. Therefore social media gives the children of the present age the opportunity to enter into global entertainment and communication. As a result of this development, there is now Internet addiction of children. Hence, there is serious need for parents to be aware of the nature of social media sites, their children are using. This is because not all of them are healthy environments for children. Experts such as childhood educators and psychologist even Paediatricians are equipped and so are better hands to assist parents not only to know and understand these websites but to encourage proper use and make them to monitor for potential problems such as cyber-bullying, facebook depression, exposure to inappropriate content and sexting. This paper proffers some recommendation that certainly will assist parents to bring up their children up to be vibrant adult even in this technological era.展开更多
To improve the quality of multimedia services and stimulate secure sensing in Internet of Things applications, such as healthcare and traffic monitoring, mobile crowdsensing(MCS) systems must address security threats ...To improve the quality of multimedia services and stimulate secure sensing in Internet of Things applications, such as healthcare and traffic monitoring, mobile crowdsensing(MCS) systems must address security threats such as jamming, spoofing and faked sensing attacks during both sensing and information exchange processes in large-scale dynamic and heterogeneous networks. In this article, we investigate secure mobile crowdsensing and present ways to use deep learning(DL) methods, such as stacked autoencoder, deep neural networks, convolutional neural networks, and deep reinforcement learning, to improve approaches to MCS security, including authentication, privacy protection, faked sensing countermeasures, intrusion detection and anti-jamming transmissions in MCS. We discuss the performance gain of these DLbased approaches compared to traditional security schemes and identify the challenges that must be addressed to implement these approaches in practical MCS systems.展开更多
文摘Three cases of transient proximal small bowel angioedema induced by intravenous administration of nonionic iodinated contrast media (CM) are presented.Computed tomography (CT) images in the venous phase displayed the proximal small bowel with circumferential thickening of the wall including the duodenum and proximal segment of the jejunum.The bowel wall was normal in non-enhanced images,and normal or inconspicuous in arterial phase enhanced images.In one of the three cases,the bowel wall was thickened in venous phase but disappeared in the 40 s delayed phase images.No filling defect was seen in the lumen of the superior mesenteric artery and vein.No peritoneal effusion or mesentery abnormality was found.Each of these patients reported only mild abdominal discomfort and recovered without specific treatment within a short time.Only one patient suffered mild diarrhea after scanning which had resolved by the following day.The transient anaphylactic small bowel angioedema due to intravenous iodinated contrast media was easily diagnosed based on its characteristic CT findings and clinical symptoms.Differential diagnosis may include inflammatory and ischemic bowel disease,as well as neoplasms.A three-phase CT protocol and good under-standing of this disorder are fundamentally important in the diagnosis of this condition.The supposed etiology behind the transient anaphylactic reaction to intravenous administration of iodinated CM in small bowel is similar to other CM-induced hypersensitive immediate reactions.The predilection location of transient anaphylactic bowel angioedema is the small intestine,particularly the proximal segment.A speculated cause may be the richer supply of vessels in the small intestine,ample mucous folds and loose connective tissue in the duodenum and the jejunum.
文摘In this 21 st century, whether we like it or not, it is very clear that the Intemet, social media, and all ad of the related technology have come to stay. This new technological discovery has brought great and wonderful benefits to our family＇s lives and relationships. However as it is always the case with any new innovations, it has its own negative side. This paper aims at investigating what actually social media is and how it translates to children, especially African children, as it relates to family and social living. Actually Internet provide benefits in areas such as cognitive and social development, it also presents risks together with opportunities for children＇s growth and development. It is common today to see children spending great quality of their time using other social websites. It is also evidenced that Interact provide benefits in the area of emotional and intellectual development and at the same time present risk as well as opportunities to children＇s development in functional and societal challenges. Therefore social media gives the children of the present age the opportunity to enter into global entertainment and communication. As a result of this development, there is now Internet addiction of children. Hence, there is serious need for parents to be aware of the nature of social media sites, their children are using. This is because not all of them are healthy environments for children. Experts such as childhood educators and psychologist even Paediatricians are equipped and so are better hands to assist parents not only to know and understand these websites but to encourage proper use and make them to monitor for potential problems such as cyber-bullying, facebook depression, exposure to inappropriate content and sexting. This paper proffers some recommendation that certainly will assist parents to bring up their children up to be vibrant adult even in this technological era.
基金supported in part by the National Natural Science Foundation of China under Grant 61671396 and 91638204in part by the open research fund of National Mobile Communications Research Laboratory,Southeast University(No.2018D08)in part by Science and Technology Innovation Project of Foshan City,China(Grant No.2015IT100095)
文摘To improve the quality of multimedia services and stimulate secure sensing in Internet of Things applications, such as healthcare and traffic monitoring, mobile crowdsensing(MCS) systems must address security threats such as jamming, spoofing and faked sensing attacks during both sensing and information exchange processes in large-scale dynamic and heterogeneous networks. In this article, we investigate secure mobile crowdsensing and present ways to use deep learning(DL) methods, such as stacked autoencoder, deep neural networks, convolutional neural networks, and deep reinforcement learning, to improve approaches to MCS security, including authentication, privacy protection, faked sensing countermeasures, intrusion detection and anti-jamming transmissions in MCS. We discuss the performance gain of these DLbased approaches compared to traditional security schemes and identify the challenges that must be addressed to implement these approaches in practical MCS systems.
