This technical note presents the Reverse Method, a novel indirect approach for estimating the global value-added tax (VAT) compliance gap. The Reverse Method leverages public datasets and a calibrated ...

2025年10月，一家位于波士顿的医疗科技公司遭遇一场“教科书式”的网络攻击。攻击者并未暴力破解密码，也没有利用零日漏洞，而是通过一封看似普通的会议邀请邮件，附带一个名为“Q3_Investor_Briefing.html”的附件。财务总监Sarah点击后，浏览器跳转至一个与Microsoft 365登录页几乎无法区分的页面。她输入账号密码，随后手机收到一条来自微软的验证码短信——她照常输入。 几 ...

Zoology is the scientific study of animals. This discipline can include animal anatomy, physiology, biochemistry, genetics, evolution, ecology, behaviour and conservation. A clade-wide study of ...

"It is exciting to think that Little Red Dots may represent the first direct observational evidence of the birth of the most massive black holes in the universe." "It's like watching a cosmic volcano ...