Unconcealed Questions

Concealed cyclotrimeric polymorph of lithium 2,2,6,6-tetramethylpiperidide unconcealed: X-ray crystallographic and NMR spectroscopic studies.

Lithium 2,2,6,6-tetramethylpiperidide (LiTMP), one of the most important polar organometallic reagents both in its own right and as a key component of ate compositions, has long been known for its classic cyclotetrameric (LiTMP)4 solid-state structure. Made by a new approach through transmetalation of Zn(TMP)2 with tBuLi in n-hexane solution, a crystalline polymorph of LiTMP has been uncovered....

E-Learning: some unanswered questions

Asthma: Achievements and Questions in Front

       Asthma, which is mainly distinguished by airway inflammation and bronchial hyper responsiveness, is known as one of the most common chronic diseases worldwide. It also is the most frequent chronic respiratory disorder amongst all age groups. On one side of the asthma story, there are massive investment of time, effort and money, a large number of pharmaceutical and academic research stud...

Answering Questions about Questions: A Persuasion Knowledge Perspective for Understanding the Effects of Rhetorical Questions

Past research is not clear on the process by which rhetorical questions influence persuasion (i.e., increased focus on message arguments vs. on the persuasion agent). Based on recent theories of persuasion knowledge and rhetorical figures in advertising, our model delineates conditions under which rhetoricals are likely to enhance argument elaboration (low salience of the rhetorical) and those ...

Questions Pool

1. In class we defined the statistical (also known as variational) distance between two distributions A and B taking values in U to be |A− B| = maxT⊆U |Pr[A ∈ T ]− Pr[B ∈ T ]|. A× B denotes the distribution on (a, b) obtained by independently picking a according to A and b according to B. (A,B) denotes some random variable on U × U with marginal distributions A and B. For f : U → U ′ and A that...