9,013 research outputs found
Are There Philosophical Answers to Psychiatric Questions?
Contemporary psychiatry has only one generally
accepted model, that of biological – materialist explanation
and treatment. But clinicians recognize that this model
omits much that is important and they therefore confront a
dilemma: either limit their practice to an incomplete model,
or use other models which seem unfounded and
speculative. Philosophical considerations may help
clinicians find a way out 1) by showing the inherent
limitations of biological – materialist explanations, and 2)
by grounding other (psychotherapeutic) approaches on
general considerations of how the mind, and in particular
language, works. These general considerations include:
the dependence of meaning upon environmental context,
the attribution of meaning as involving sets of skills,
capacities and reactions, the multiplicity of language
games and therefore their individual limitations, the
dependence of meaning upon our shared interests, the
largely unconscious nature of mind and our necessary
limitations to public criteria for mental events and
processes
Refined Inference on Long Memory in Realized Volatility
There is an emerging consensus in empirical finance that realized volatility series typically display long range dependence with a memory parameter (d) around 0.4 (Andersen et. al. (2001), Martens et al. (2004)). The present paper provides some analytical explanations for this evidence and shows how recent results in Lieberman and Phillips (2004a, 2004b) can be used to refine statistical inference about d with little computational effort. In contrast to standard asymptotic normal theory now used in the literature which has an O(n-1/2) error rate on error rejection probabilities, the asymptotic approximation used here has an error rate of o(n-1/2). The new formula is independent of unknown parameters, is simple to calculate and highly user-friendly. The method is applied to test whether the reported long memory parameter estimates of Andersen et. al. (2001) and Martens et. al. (2004) differ significantly from the lower boundary (d = 0.5) of nonstationary long memory.ARFIMA; Edgeworth expansion; Fourier integral expansion; Fractional differencing; Improved inference; Long memory; Pivotal statistic; Realized volatility; Singularity
Semi-Automated SVG Programming via Direct Manipulation
Direct manipulation interfaces provide intuitive and interactive features to
a broad range of users, but they often exhibit two limitations: the built-in
features cannot possibly cover all use cases, and the internal representation
of the content is not readily exposed. We believe that if direct manipulation
interfaces were to (a) use general-purpose programs as the representation
format, and (b) expose those programs to the user, then experts could customize
these systems in powerful new ways and non-experts could enjoy some of the
benefits of programmable systems.
In recent work, we presented a prototype SVG editor called Sketch-n-Sketch
that offered a step towards this vision. In that system, the user wrote a
program in a general-purpose lambda-calculus to generate a graphic design and
could then directly manipulate the output to indirectly change design
parameters (i.e. constant literals) in the program in real-time during the
manipulation. Unfortunately, the burden of programming the desired
relationships rested entirely on the user.
In this paper, we design and implement new features for Sketch-n-Sketch that
assist in the programming process itself. Like typical direct manipulation
systems, our extended Sketch-n-Sketch now provides GUI-based tools for drawing
shapes, relating shapes to each other, and grouping shapes together. Unlike
typical systems, however, each tool carries out the user's intention by
transforming their general-purpose program. This novel, semi-automated
programming workflow allows the user to rapidly create high-level, reusable
abstractions in the program while at the same time retaining direct
manipulation capabilities. In future work, our approach may be extended with
more graphic design features or realized for other application domains.Comment: In 29th ACM User Interface Software and Technology Symposium (UIST
2016
First occurrence of the problematic vetulicolian Skeemella clavula in the Cambrian Marjum Formation of Utah, USA
The Cambrian Marjum Formation of western Utah (USA) preserves a diverse soft-bodied fauna from the upper Drumian that is slightly younger than the well-known Burgess Shale. While the Marjum is dominated by arthropods, animals belonging to a variety of phyla have been found. Here, we document the second occurrence of the rare, enigmatic taxon Skeemella clavula, which was previously thought to be restricted to the Pierson Cove Formation of the Drum Mountains. The occurrence in the Marjum represents a new preservational setting, as well as a slightly younger deposit. The new specimens also expand the number of known specimens to three. In addition, they improve understanding of the morphology of this representative of the problematic phylum Vetulicolia
Constitutional Law - Search and Seizure - Evidence Obtained by Unreasonable Search and Seizure Is Constitutionally Inadmissible in State Criminal Prosecutions
Corporations - Stockholders\u27 Suit - State Security for Expenses Statute Is Inapplicable in Stockholders\u27 Derivative Suit in Federal Court for Violation of Securities Exchange Act Provision and Regulation Thereunder
Constitutional Law - Search and Seizure - Evidence Obtained by Unreasonable Search and Seizure Is Constitutionally Inadmissible in State Criminal Prosecutions
Inventory Reduction and Productivity Growth: A Comparison of Japanese and US Automotive Sectors
This study asseses the inventory and productivity performance of the Japanese and US
automotive industries in recent decades. Within each country we distinguish between
vehicle assemblers and parts suppliers. In Japan, assemblers and suppliers made dramatic
inventory reductions and productivity gains, particularly during the 1970s. By
comparison, we find an unbalanced pattern for the United States: American assembly
plants have been streamlined but parts suppliers have stagnated. In both countries our
findings suggest a strong association between inventory reduction and productivity growth
Inventory Reduction and Productivity Growth: Evidence from the Japanese Automotive Sector
The literature on JIT production suggests a causal link between work-in-process
inventory and manufacturing productivity. Such a connection has been described in
numerous case studies but never tested statistically. This paper uses historical data for
52 Japanese automotive companies to evaluate the inventory-productivity relationship.
We find that inventory reductions stimulated gains in productivity, rather than vice versa.
On average, each 10% reduction in inventory led to about a 1% gain in labor productivity,
with a lag of about one year. Significant differences are found among company groups:
Toyota affiliates had a shorter lag; while Nissan affiliates demonstrated no productivity
effect. Firms that made inventory reductions typically saw an increase in their
productivity rank
Inventory Reduction and Productivity Growth: Linkages in the Japanese Automotive Industry
The literature on JIT production suggests a causal link between work-in-process
inventory and manufacturing productivity. Such a connection has been described in
numerous case studies but never tested statistically. This paper uses historical data for 52
Japanese automotive companies to evaluate the inventory-productivity relationship. We
find that firms increased their productivity rank during periods of substantial inventory
reduction. More detailed tests suggest that inventory reductions stimulated gains in
productivity: on average, each 10% reduction in inventory led to about a 10% gain in
labor productivity, with a lag of about one year. Such effects were more immediate for
Toyota affiliates but undetectable for close suppliers of Nissan. These findings imply
that inventory reduction served as an important driver of process improvement for many
Japanese automotive companies, although some firms emphasized other methods
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