23,824 research outputs found
Glucocorticoids Inhibit Sodium Depletion-induced Salt Appetite in Rat
Glucocorticoids, produced in adrenal cortex, exert potent natriuretic and diuretic actions in the kidney. Recently, it has been found that glucocorticoids could upregulate the expression of natriuretic peptide receptor A (NPR-A), the primary receptor of atrial natriuretic peptide, in the hypothalamus of the rat. Consequently, systemic administration of glucocorticoid could block dehydration-induced water intake by activation hypothalamic NPR-A. We describe here glucocorticoids could inhibit sodium intake when administrated systemically in conscious, salt-depleted rats; an effect which was strong and long-lasting. The study provided further evidence for the actions of glucocorticoids on central nervous system, which together with their established renal actions coordinated to normalize extracellular fluid volume
Network synchronizability analysis: the theory of subgraphs and complementary graphs
In this paper, subgraphs and complementary graphs are used to analyze the
network synchronizability. Some sharp and attainable bounds are provided for
the eigenratio of the network structural matrix, which characterizes the
network synchronizability, especially when the network's corresponding graph
has cycles, chains, bipartite graphs or product graphs as its subgraphs.Comment: 13 pages, 7 figure
EASYFLOW: Keep Ethereum Away From Overflow
While Ethereum smart contracts enabled a wide range of blockchain
applications, they are extremely vulnerable to different forms of security
attacks. Due to the fact that transactions to smart contracts commonly involve
cryptocurrency transfer, any successful attacks can lead to money loss or even
financial disorder. In this paper, we focus on the overflow attacks in Ethereum
, mainly because they widely rooted in many smart contracts and comparatively
easy to exploit. We have developed EASYFLOW , an overflow detector at Ethereum
Virtual Machine level. The key insight behind EASYFLOW is a taint analysis
based tracking technique to analyze the propagation of involved taints.
Specifically, EASYFLOW can not only divide smart contracts into safe contracts,
manifested overflows, well-protected overflows and potential overflows, but
also automatically generate transactions to trigger potential overflows. In our
preliminary evaluation, EASYFLOW managed to find potentially vulnerable
Ethereum contracts with little runtime overhead.Comment: Proceedings of the 41st International Conference on Software
Engineering: Companion Proceedings. IEEE Press, 201
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