Harvard economist Raj Chetty has pointed to economic and racial segregation, community density, the size of a community's middle class, the quality of schools, community religiosity, and family structure, which he calls the single strongest correlate of upward mobility. 出自-2015年12月阅读原文 ...
static void ExplainMemberNodes(PlanState **planstates, int nplans, List *ancestors, ExplainState *es);static void ExplainMissingMembers(int nplans, int nchildren, ExplainState *es);static void ExplainSubPlans(List *plans, List *ancestors, const char *relationship, ExplainState *es);static void...
Across the stable density stratification of the abyssal ocean, deep dense water is slowly propelled upward by sustained, though irregular, turbulent mixing. The resulting mean upwelling determines large-scale oceanic circulation properties like heat and carbon transport. In the ocean interior, this turbu...
In comparison to partially reopening by uniformly reducing visits, the reduced maximum occupancy strategy—which disproportionately targets POIs during their most risky high-density periods—always results in a smaller predicted increase in infections for the same number of visits. The y axis plots the...
(2022) and report results using the “language of evidence” for results of frequentist statistics and evaluate Bayesian results in terms of the entire posterior distributions and references to the 89% highest posterior density intervals (HPDIs; McElreath, 2018)....
The contact resistivity c2 is caused by the barrier height (桅2) of the high-low junction between the heavily doped contact region and the bulk material. There are two aspects: (1) If bulk material is degenerated, i.e. ND >NC (NC: effective density of states in conduction band) or ...
Which of the following statements is not correct about the three states of matter, i.e., solid, liquids and gas? AMolecules of a solid possess least kinetic energy whereas those of a gases possess highest kinetic energy BThe density of solid is highest whereas theat of gases is lowest C...
(lowest) frequency and the speed of the waves propagating along the string is 300 m s-1.Show that the string is vibrating at a frequency of 230 Hz.[2](c) Assume that the magnet (seen in Fig. 5.1)produces a uniform magnetic flux density of 4.50 mT over a 2.00 cm segment of the ...
View Solution density of d-block elements(only trend) View Solution The correct statement for d-block element is View Solution The d−block elements easily form alloys because- View Solution The correct statement about d-block elements is View Solution ...
1.2041 kg/m³ is the density of air at sea level A (in m/s) is the calculated throw speed regardless of direction, if you assume constant throw power over time in Watts and the body length as acceleration distance (arm has half the body length and goes from back to front) from 0...