Resistivity measured by direct and alternating current: why are they different?

medicinal plants and antioxidants: why they are not always beneficial?

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DABCO and DMAP--why are they different in organocatalysis?

Two Measures of Reserves: Why Are They Different?

Though these series have similardescriptions, their growth rates often differ substantially, especially over periods as short as a month (table 1). For instance, in the three years ending in December 1982, the difference between monthly growth rates of the two reserves series (absolute value) averaged 8.6 percentage points. Average differences in growth rates were much smaller over periods long...

Task Difficulty and Its Components: Are They Alike or Different across Different Macro-genres?

Task difficulty across different macro-genres continues to remain among less attended areas in second language development studies. This study examined the correlation between task difficulty across the descriptive, narrative, argumentative, and expository macro-genres. The three components of task difficulty (i.e., code complexity, cognitive complexity, and communicative stress) were also comp...

Tales of 34 iPhone Users: How they change and why they are different

We present results from a longitudinal study of 34 iPhone 3GS users, called LiveLab. LiveLab collected unprecedented usage data through an in-device, programmable logger and several structured interviews with the participants throughout the study. We have four objectives in writing this paper: (i) share the findings with the research community; (ii) provide insights guiding the design of smartp...