title: Wave mixed, wind-generated near-surface shear observed over a tidal flat

authors: Henderson, Stephen M.

subjects: waves

abstract: Around high tide over a ﬂooded tidal ﬂat, vertical shear measured 0.13–0.4 m beneath the sea surface by upward-looking Acoustic Doppler Proﬁlers (ADPs) was usually aligned with the wind. However, shear did not increase with increasing windspeed, likely owing to an increase in wave heights and wave-generated mixing with increasing windspeed. The associated increase in water-side drag coefﬁcient with windspeed was predicted, with substantial scatter, by a model for near-surface mixing by breaking waves. A depth-independent eddy-viscosity model yielded only slightly less skill than a ﬁtted depth-dependent model. Farther (0.3–0.6 m) from the surface, model skill was low, suggesting that shear at depth was often determined by factors other than wind. Wave heights tended to increase with increasing water depth. Consequently, the simulated wave-generated surface eddy viscosity tended to increase with increasing depth.

text: Wave mixed, wind-generated near-surface shear observed over a tidal flat Around high tide over a ﬂooded tidal ﬂat, vertical shear measured 0.13–0.4 m beneath the sea surface by upward-looking Acoustic Doppler Proﬁlers (ADPs) was usually aligned with the wind. However, shear did not increase with increasing windspeed, likely owing to an increase in wave heights and wave-generated mixing with increasing windspeed. The associated increase in water-side drag coefﬁcient with windspeed was predicted, with substantial scatter, by a model for near-surface mixing by breaking waves. A depth-independent eddy-viscosity model yielded only slightly less skill than a ﬁtted depth-dependent model. Farther (0.3–0.6 m) from the surface, model skill was low, suggesting that shear at depth was often determined by factors other than wind. Wave heights tended to increase with increasing water depth. Consequently, the simulated wave-generated surface eddy viscosity tended to increase with increasing depth.

year: 2012

title: Maximum Common Subgraph based locally weighted regression

authors: Seeland, Madeleine

subjects: Machine learning

abstract: This paper investigates a simple, yet effective method for regression on graphs, in particular for applications in chem-informatics and for quantitative structure-activity relationships (QSARs). The method combines Locally Weighted Learning (LWL) with Maximum Common Subgraph (MCS) based graph distances. More specifically, we investigate a variant of locally weighted regression on graphs (structures) that uses the maximum common subgraph for determining and weighting the neighborhood of a graph and feature vectors for the actual regression model. We show that this combination, LWL-MCS, outperforms other methods that use the local neighborhood of graphs for regression. The performance of this method on graphs suggests it might be useful for other types of structured data as well.

text: Maximum Common Subgraph based locally weighted regression This paper investigates a simple, yet effective method for regression on graphs, in particular for applications in chem-informatics and for quantitative structure-activity relationships (QSARs). The method combines Locally Weighted Learning (LWL) with Maximum Common Subgraph (MCS) based graph distances. More specifically, we investigate a variant of locally weighted regression on graphs (structures) that uses the maximum common subgraph for determining and weighting the neighborhood of a graph and feature vectors for the actual regression model. We show that this combination, LWL-MCS, outperforms other methods that use the local neighborhood of graphs for regression. The performance of this method on graphs suggests it might be useful for other types of structured data as well.

year: 2012

title: Serendipity, shot-gun, strategic: Does it make a difference?

authors: Glover, Marewa

subjects: Maori

abstract: Kaupapa Māori research methodology
demands practical outcomes of tangible
benefit to Māori. This paper reflects on the
steps taken to ensure benefit resulted from
my PhD research on the
cessation of Māori smoking behaviour, and I ask where is that
benefit now?
Ensuring benefit starts before the
project begins when the idea is conceived.
Thus, I first reflect back to the birth of the
idea. Then the consultation undertaken,
and the conduct of the research, is reviewed
with a utilisation focus. The personal costs
undertaking research are then considered
the sections looking at contribution and
career. Finally, the question from the title
this paper is posed. Examples of the
barriers to strategic action, such as,
competition and the difficulty of achieving
consensus are presented. Finally, the
consequences of the research are outlined.

text: Serendipity, shot-gun, strategic: Does it make a difference? Kaupapa Māori research methodology
demands practical outcomes of tangible
benefit to Māori. This paper reflects on the
steps taken to ensure benefit resulted from
my PhD research on the
cessation of Māori smoking behaviour, and I ask where is that
benefit now?
Ensuring benefit starts before the
project begins when the idea is conceived.
Thus, I first reflect back to the birth of the
idea. Then the consultation undertaken,
and the conduct of the research, is reviewed
with a utilisation focus. The personal costs
undertaking research are then considered
the sections looking at contribution and
career. Finally, the question from the title
this paper is posed. Examples of the
barriers to strategic action, such as,
competition and the difficulty of achieving
consensus are presented. Finally, the
consequences of the research are outlined.

year: 2003