Williams College

About: Williams College is a education organization based out in Williamstown, Massachusetts, United States. It is known for research contribution in the topics: Population & Politics. The organization has 2257 authors who have published 5015 publications receiving 213160 citations. The organization is also known as: Williams.

Isoperimetric regions in cones

Abstract: We consider cones C = 0? M n and prove that if the Ricci curvature of C is nonnegative, then geodesic balls about the vertex minimize perimeter for given volume. If strict inequality holds, then they are the only stable regions.

Retrieval attempts enhance learning, but retrieval success (versus failure) does not matter.

Abstract: Retrieving information from memory enhances learning. We propose a 2-stage framework to explain the benefits of retrieval. Stage 1 takes place as one attempts to retrieve an answer, which activates knowledge related to the retrieval cue. Stage 2 begins when the answer becomes available, at which point appropriate connections are strengthened and inappropriate connections may be weakened. This framework raises a basic question: Does it matter whether Stage 2 is initiated via successful retrieval or via an external presentation of the answer? To test this question, we asked participants to attempt retrieval and then randomly assigned items (which were equivalent otherwise) to be retrieved successfully or to be copied (i.e., not retrieved). Experiments 1, 2, 4, and 5 tested assumptions necessary for interpreting Experiments 3a, 3b, and 6. Experiments 3a, 3b, and 6 did not support the hypothesis that retrieval success produces more learning than does retrieval failure followed by feedback. It appears that retrieval attempts promote learning but retrieval success per se does not.

Conflict and Commensuration: Contested Market Making in India's Private Real Estate Development Sector

Abstract: Newly constructed high-rise housing and malls, soaring land prices and violent confrontations over land testify to the massive urban transformations underway in India today. Having secured an expanded role in urban development from the state, the private sector helps to shape urban restructuring; however, few scholars have studied private real estate development in India or revealed the factions that underlie an analytically unitary ‘private sector’. This article sheds light on private sector real estate industry members' efforts to develop an internationally familiar real estate market in India. Foreign investors and consultants have been collaborating with Indian real estate developers, who are now active intermediaries in the flow of capital into India. Drawing on participant observation and data from interviews, this article finds, however, that foreign financiers and Indian developers struggle to form partnerships on account of differences on issues like land valuation. The outcome of such conflicts will define the contours of Indian real estate development and its integration with international markets in the future.

Voting experts: An unsupervised algorithm for segmenting sequences

Abstract: We describe a statistical signature of chunks and an algorithm for finding chunks. While there is no formal definition of chunks, they may be reliably identified as configurations with low internal entropy or unpredictability and high entropy at their boundaries. We show that the log frequency of a chunk is a measure of its internal entropy. The Voting-Experts exploits the signature of chunks to find word boundaries in text from four languages and episode boundaries in the activities of a mobile robot.

Direct versus indirect tests of memory for source: judgments of modality.

Abstract: We studied the relation between performance on direct versus indirect tests of memory for modality. Subjects read or heard words in a mixed list and then were tested by visual perceptual identification (the indirect test) and direct report of items as read, heard, or new. There was a dependent relation between perceptual identification performance and modality judgments, in accord with the hypothesis that subjects base their judgments of modality on relative perceptual fluency. In Experiment 2, we attempted to change the degree of dependence by providing subjects with an alternative basis for modality judgments. Subjects given a mnemonic to encode modality exhibited less dependence between perceptual identification performance and modality judgments than did subjects who encoded modality incidentally. The relation between direct and indirect tests of memory for source characteristics depends on the basis used for each. Language: en