969 research outputs found
Reading Globalization from the Margin: The Case of Abdullah Munshi
In this essay I argue that the global perspective, established in the era of modernEuropean imperialism, is given institutional expression as a way of seeing that is engaged—both by ruler and ruled— as the frame of adequate representation. Briefly outlining how this frame operates in historical and cultural studies today, I examine its deployment in mid-nineteenth-century Melaka and Singapore through a reading of the Hikayat Abdullah, a seminal Malay-language text composed by Abdullah bin Abdul Kadir. Although Abdullah self-consciously sets about reproducing the global perspective, I show how this mode of thematization is interrupted and displaced as it brings about an encounter between the diverse and uneven contexts of the native and European worlds
SPRK: A Low-Cost Stewart Platform For Motion Study In Surgical Robotics
To simulate body organ motion due to breathing, heart beats, or peristaltic
movements, we designed a low-cost, miniaturized SPRK (Stewart Platform Research
Kit) to translate and rotate phantom tissue. This platform is 20cm x 20cm x
10cm to fit in the workspace of a da Vinci Research Kit (DVRK) surgical robot
and costs $250, two orders of magnitude less than a commercial Stewart
platform. The platform has a range of motion of +/- 1.27 cm in translation
along x, y, and z directions and has motion modes for sinusoidal motion and
breathing-inspired motion. Modular platform mounts were also designed for
pattern cutting and debridement experiments. The platform's positional
controller has a time-constant of 0.2 seconds and the root-mean-square error is
1.22 mm, 1.07 mm, and 0.20 mm in x, y, and z directions respectively. All the
details, CAD models, and control software for the platform is available at
github.com/BerkeleyAutomation/sprk
EdgeServe: An Execution Layer for Decentralized Prediction
The relevant features for a machine learning task may be aggregated from data
sources collected on different nodes in a network. This problem, which we call
decentralized prediction, creates a number of interesting systems challenges in
managing data routing, placing computation, and time-synchronization. This
paper presents EdgeServe, a machine learning system that can serve
decentralized predictions. EdgeServe relies on a low-latency message broker to
route data through a network to nodes that can serve predictions. EdgeServe
relies on a series of novel optimizations that can tradeoff computation,
communication, and accuracy. We evaluate EdgeServe on three decentralized
prediction tasks: (1) multi-camera object tracking, (2) network intrusion
detection, and (3) human activity recognition.Comment: 13 pages, 8 figure
Quantifying Uncertainty in Aggregate Queries over Integrated Datasets
Data integration is a notoriously difficult and heuristic-driven process,
especially when ground-truth data are not readily available. This paper
presents a measure of uncertainty by providing maximal and minimal ranges of a
query outcome in two-table, one-to-many data integration workflows. Users can
use these query results to guide a search through different matching
parameters, similarity metrics, and constraints. Even though there are
exponentially many such matchings, we show that in appropriately constrained
circumstances that this result range can be calculated in polynomial time with
bipartite graph matching. We evaluate this on real-world datasets and synthetic
datasets, and find that uncertainty estimates are more robust when a
graph-matching based approach is used for data integration
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