536 research outputs found
hpDJ: An automated DJ with floorshow feedback
No full textMany radio stations and nightclubs employ Disk-Jockeys (DJs) to provide a continuous uninterrupted stream or “mix” of dance music, built from a sequence of individual song-tracks. In the last decade, commercial pre-recorded compilation CDs of DJ mixes have become a growth market. DJs exercise skill in deciding an appropriate sequence of tracks and in mixing 'seamlessly' from one track to the next. Online access to large-scale archives of digitized music via automated music information retrieval systems offers users the possibility of discovering many songs they like, but the majority of consumers are unlikely to want to learn the DJ skills of sequencing and mixing. This paper describes hpDJ, an automatic method by which compilations of dance-music can be sequenced and seamlessly mixed by computer, with minimal user involvement. The user may specify a selection of tracks, and may give a qualitative indication of the type of mix required. The resultant mix can be presented as a continuous single digital audio file, whether for burning to CD, or for play-out from a personal playback device such as an iPod, or for play-out to rooms full of dancers in a nightclub. Results from an early version of this system have been tested on an audience of patrons in a London nightclub, with very favourable results. Subsequent to that experiment, we designed technologies which allow the hpDJ system to monitor the responses of crowds of dancers/listeners, so that hpDJ can dynamically react to those responses from the crowd. The initial intention was that hpDJ would monitor the crowd’s reaction to the song-track currently being played, and use that response to guide its selection of subsequent song-tracks tracks in the mix. In that version, it’s assumed that all the song-tracks existed in some archive or library of pre-recorded files. However, once reliable crowd-monitoring technology is available, it becomes possible to use the crowd-response data to dynamically “remix” existing song-tracks (i.e, alter the track in some way, tailoring it to the response of the crowd) and even to dynamically “compose” new song-tracks suited to that crowd. Thus, the music played by hpDJ to any particular crowd of listeners on any particular night becomes a direct function of that particular crowd’s particular responses on that particular night. On a different night, the same crowd of people might react in a different way, leading hpDJ to create different music. Thus, the music composed and played by hpDJ could be viewed as an “emergent” property of the dynamic interaction between the computer system and the crowd, and the crowd could then be viewed as having collectively collaborated on composing the music that was played on that night. This en masse collective composition raises some interesting legal issues regarding the ownership of the composition (i.e.: who, exactly, is the author of the work?), but revenue-generating businesses can nevertheless plausibly be built from such technologies
Beach development, sediment budget and coastal erosion at Holderness.
No full textComplex relationships exist among offshore conditions, beach
sediment transport and morphology, and till cliff erosion. Modelled
and measured sediment transport rates established for the Holderness
coast are similar to those on comparable coasts elsewhere. The
direction of sediment drift depends on wave approach, and determining
sediment transport rates, cliff composition and cliff retreat
rates allows a sediment budget to be prepared. The beach response
predicted by the sediment budget was confirmed by field observations,
with budget surpluses and deficits coinciding with full and depleted
beach profiles respectively. The area of deficit in the north of the
study area was associated with the reduced sheltering effect of
Flamborough Head on sediment drift.
At most profiles, especially those with a sediment deficit, high
energy waves may remove the sand veneer completely, leaving the
till platform exposed. These bare till patches which elsewhere have
been called ords and have been regarded as unique, were thought, in
the present study,to represent a normal beach response to limited
sediment supply and prevailing offshore conditions.
Beach evolution was also modelled formally, the range of beach
profiles exhibited on the Holderness coast being grouped into a
number of distinct types, and evolution among them described and
predicted by a first-order Markov model. This can be refined to
provide different models for "winter" and "summer". Different modal
types occur at different locations, and certain types of transitions
between classes can be associated with particular ranges of wave
conditions.
Beach Development, Sediment Budget and Coastal Erosion at Holderness
Susan J. Mason.
Till cliff retreat at Holderness is extremely variable, both
spatially and temporally, being influenced by beach level, energy
conditions, cliff moisture content and the actions of man.
The sediment transport rates, cliff retreat data, sediment
budget and beach behaviour model are all essential elements of a
research programme currently being undertaken to find a cheap
method of protecting this coast
Clarification of Cliff and Caruso (1998)
No full textIn response to N. Cliff and J. C. Caruso (1998), the author clarifies that it is the sum of the reliabilities of the components that remains invariant under rotation in reliable component analysis
Evidencing the "robot phase transition" in experimental human-algorithmic markets
No full textJohnson, Zhao, Hunsader, Meng, Ravindar, Carran, and Tivnan (2012) recently suggested the existence of a phase transition in the dynamics of financial markets in which there is free interaction between human traders and algorithmic trading systems ("robots"). Above a particular time-threshold, humans and robots trade with one another; below the threshold all transactions are robot-to-robot. We refer to this abrupt system transition as the "robot phase transition". Here, we conduct controlled experiments where human traders interact with 'robot' trading agents in minimal models of electronic financial markets to see if correlates of the two regimes suggested by Johnson et al. (2012) occur in such laboratory conditions. Our results indicate that when trading robots act on a super-human timescale, the market starts to fragment, with statistically lower human-robot interactions than we would expect from a fully mixed market. We tentatively conclude that this is the first empirical evidence for the robot phase transition occurring under controlled experimental conditions
Measurement of the effective B0s→K+K− lifetime
No full textA measurement of the effective lifetime is presented using approximately 37 pb−1 of data collected by LHCb during 2010. This quantity can be used to put constraints on contributions from processes beyond the Standard Model in the meson system and is determined by two complementary approaches as
τKK=1.440±0.096 (stat)±0.008 (syst)±0.003 (model) ps
Getting on top of the glass cliff: Reviewing a decade of evidence, explanations, and impact
No full textThis is the author accepted manuscript. The final version is available from Elsevier via the DOI in this recordThe glass cliff refers to the tendency for women to be more likely than men to be appointed to leadership positions that are risky and precarious. This paper reviews the first decade of research into the phenomenon and has three key aims: (a) to summarize and integrate evidence of the glass cliff, (b) to clarify the processes that have been shown to underlie the glass cliff, and (c) to explore the factors that may moderate the glass cliff phenomenon. We show that the glass cliff has had a significant impact on public discourse around women and leadership but is a complex, contextual, and multiply determined phenomenon.European Social FundEconomic and Social Research Council (ESRC)RCU
Distant view of The Cliff Palace taken at the top of the cliff, at Mesa Verde (now a national park), Colorado, ca.1900
No full textPhotograph of a distant view of The Cliff Palace taken at the top of the cliff, at Mesa Verde (now a national park), Colorado, ca.1900. A complex of primitive square houses, made of stones (or adobe), is situated in a large overhanging cave-like recess in the canyon wall. Many of the houses have square windows and several of the houses have holes punctured through their walls. Within the recess and on the canyon walls are carved openings or windows (possibly dwellings?). Shrubs and trees cover the area at the base of the cliff (foreground). Trees cover a majority of the land at the top of the cliff.; "What is in the present day called Mesa Verde ('Green Table') National Park is an area containing many ruins of rock dwellings built into cliffs as well as on the flat surfaces of the upper mesa area. Within the park area itself, which occupies the northeast corner of the mesa (the majority of the mesa is on the Ute Mountain Ute Indian Reservation), almost 4,000 sites have been identified, including over 600 cliff dwellings. People had lived in this area for a long time previously, but the remarkable cliff dwellings themselves were constructed and inhabited at the end of this age between 1200 and 1300, after which the people left the area. Mesa Verde had a strange feel to it. From what was gathered during the visit, the people built the cliff dwellings--the most 'famous' and frequently photographed locations in the area--apparently as a 'retreat' from possibly an increasingly hostile setting and vulnerability that, living down in the valleys or up on the upper mesa, they became evermore subjected to. How else can one explain the move into cliffs where the majority of the living space was in shadow and where winter time would be much darker and damper, and hence, colder and less comfortable. It seems the more preferable spots would not be in such dark places. Something happened to make it necessary to move to higher, more defensible, ground. This seems to be substantiated by the fact that after 1300 the area was not lived in at all by these people." -- unknown author
Cliff dwellings near the Montezuma's Well, Arizona, ca.1900
No full textPhotograph of the cliff dwellings near a lake named "Montezuma's Well", Arizona, ca.1900. Caves and holes are carved into the rocky cliff, while shrubs and dry bushes cover the hillside leading up to the caves. A man is visible walking up the rocky hill at right.; Compares to CHS-2586.; "Montezuma's Castle is well known among tourists who exit Interstate 17 on their way north to the Grand Canyon. But few Montezuma Castle tourists are familiar with the park's counterpart-- Montezuma's Well. The "well" was first brought to the general public's attention by Richard J. Hinton in his Handbook to Arizona, published in 1878. It is believed that the first white visitor to the area was the Spaniard Antonio de Espejo on his 1583 expedition. In his journal he describes an abandoned pueblo with a ditch running from a nearby pond. It is thought this was Montezuma's Castle and Well. Early settlers to the area concluded that the stately cliff dwelling belonged to the Aztec emperor Montezuma. Actually, the "castle" was home to the Sinagua -- not the Aztecs -- and was deserted nearly a century before Montezuma was born. Montezuma never lived in the castle named after him nor did he drink from the well's waters." -- unknown author
Eastland seated at the 1978 Symposium of Deposit Guaranty National Bank.
No full textPictured: Mississippi Governor Cliff Finch and John C. White.https://egrove.olemiss.edu/joephoto_e/1294/thumbnail.jp
The who, when, and why of the glass cliff phenomenon: A meta-analysis of appointments to precarious leadership positions
No full textThis is the author accepted manuscript. The final version is available from the American Psychological Association via the DOI in this recordData availability: The data sets, analysis code, and codebook for analyses are available at
https://osf.io/b8tzq/?view_only=6aad2cc8f1ba4041bcd2cc48e44cb4aaWomen and members of other underrepresented groups who break through the glass ceiling often find themselves in precarious leadership positions, a phenomenon that has been termed the glass cliff. The glass cliff has been investigated in a range of domains using various methodologies, but evidence is mixed. In three meta analyses, we examined (a) archival field studies testing whether members of underrepresented groups, compared to members of majority groups, are more likely to be appointed to leadership positions in times of crisis; (b) experimental studies testing whether members of underrepresented groups, compared to members of majority
groups, are evaluated as more suitable for, as well as (c) more likely to be selected for, leadership positions in times of crisis. All three analyses provided some evidence in line with the glass cliff for women. Specifically, the meta-analysis of archival studies revealed a small glass cliff effect that was dependent on organizational domain. The leadership suitability meta-analysis also showed a small glass cliff effect in between-participants studies, but not in within-participants studies. The analysis of leadership selection revealed that women are more likely to be selected over men in times of crisis, and that this effect is larger in countries with higher gender inequality. The glass cliff also extended to members of underrepresented racial and ethnic groups. We explore several moderating factors and report analyses shedding light on the underlying causes of the glass cliff. We discuss implications of our findings as well as open questions.Economic and Social Research Council (ESRC)European Commissio
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