scholarly journals Overlapped Music segmentation using a new Effective Feature and Random Forests

2019 ◽  
Vol 8 (2) ◽  
pp. 181
Author(s):  
Duraid Mohammed ◽  
Khamis A. Al-Karawi ◽  
Philip Duncan ◽  
Francis F. Li
Keyword(s):  
Content Analysis ◽  
Random Forests ◽  
Real World ◽  
The Other ◽  
Audio Classification ◽  
Audio Signals ◽  
Abrupt Changes ◽  
Audio Indexing ◽  
Changes Over Time ◽  
Over Time

<div><p>In the field of audio classification, audio signals may be broadly divided into three classes: speech, music and events. Most studies, however, neglect that real audio soundtracks can have any combination of these classes simultaneously. In this study, a novel feature, “Entrocy”, is proposed for the detection of music both in pure form and overlapping with the other audio classes. Entrocy is defined as the variation of the information (or entropy) in an audio segment over time. Segments which contain music were found to have lower Entrocy since there are fewer abrupt changes over time.</p></div><p class="Abstract">We have also compared Entrocy with existing music detection features and the entrocy showing a promising performance.</p><p class="IndexTerms"><a name="PointTmp"></a><em>Keywords</em>—Music detection, audio content analysis, audio indexing, Entropy, real world audio classification.</p>

Arguments used by proponents and opponents in Brazil’s regulatory discussions of e-cigarettes and heated tobacco products

2021 ◽  
pp. tobaccocontrol-2021-056628
Author(s):  
Mônica Nunes-Rubinstein ◽  
Teresa Leão
Keyword(s):  
Public Health ◽  
Content Analysis ◽  
Cigarette Smoking ◽  
Health Risks ◽  
Regulatory Agency ◽  
Economic Consequences ◽  
The Other ◽  
Tobacco Products ◽  
The Right ◽  
Over Time

ObjectivesTo identify proponents and opponents of the commercialisation and marketing of e-cigarettes and heated tobacco products (HTPs), identify the arguments used on both sides and compare how the arguments have changed over time, we analysed three policy discussions occurring in 2009, 2018 and 2019.MethodsWe conducted a content analysis of one document and six videos from these discussions, provided on the Brazilian Health Regulatory Agency website, or upon request.ResultsThe arguments most used by tobacco companies were related to claims that the use of e-cigarettes and HTPs is less harmful than conventional tobacco. Unions that support its commercialisation also argued that lifting the ban would prevent smuggling and guarantee their quality. On the other side, universities, medical and anti-tobacco institutions argued that such devices may have health risks, including the risk of inducing cigarette smoking. In 2009, most arguments belonged to the ‘health’ theme, while in 2018 and 2019 economic arguments and those related to morals and ethics were frequently used.ConclusionsThose that supported the commercialisation and marketing of e-cigarettes and HTPs first focused on arguments of harm reduction, while 10 years later the right to access and potential economic consequences also became common. Public health agents and academics must gather evidence to effectively respond to these arguments and discuss these policies, and must prepare themselves to use and respond to arguments related to moral and economic themes.

scholarly journals Anti-Memorials and the Art of Forgetting: Critical Reflections on a Memorial Design Practice

2008 ◽  
Vol 15 ◽  
Author(s):  
SueAnne Ware
Keyword(s):  
Human Activity ◽  
The Other ◽  
Complex Spectrum ◽  
Design Practice ◽  
Design Work ◽  
The Past ◽  
Heroin Overdose ◽  
The Future ◽  
Changes Over Time ◽  
Over Time

Andreas Huyssen writes, ‘Remembrance as a vital human activity shapes our links to the past, and the ways we remember define us in the present. As individuals and societies, we need the past to construct and to anchor our identities and to nurture a vision of the future.’ Memory is continually affected by a complex spectrum of states such as forgetting, denial, repression, trauma, recounting and reconsidering, stimulated by equally complex changes in context and changes over time. The apprehension and reflective comprehension of landscape is similarly beset by such complexities. Just as the nature and qualities of memory comprise inherently fading, shifting and fleeting impressions of things which are themselves ever-changing, an understanding of a landscape, as well as the landscape itself, is a constantly evolving, emerging response to both immense and intimate influences. There is an incongruity between the inherent changeability of both landscapes and memories, and the conventional, formal strategies of commemoration that typify the constructed landscape memorial. The design work presented in this paper brings together such explorations of memory and landscape by examining the ‘memorial’. This article examines two projects. One concerns the fate of illegal refugees travelling to Australia: The SIEVX Memorial Project. The other, An Anti-Memorial to Heroin Overdose Victims, was designed by the author as part of the 2001 Melbourne Festival.

scholarly journals Lifelong Learning with a Changing Action Set

2020 ◽  
Vol 34 (04) ◽  
pp. 3373-3380
Author(s):  
Yash Chandak ◽  
Georgios Theocharous ◽  
Chris Nota ◽  
Philip Thomas
Keyword(s):  
Lifelong Learning ◽  
Real World ◽  
Large Scale ◽  
Learning Problems ◽  
Sequential Decision Making ◽  
Sequential Decision ◽  
Transition Dynamics ◽  
Unknown Structure ◽  
Changes Over Time ◽  
Over Time

In many real-world sequential decision making problems, the number of available actions (decisions) can vary over time. While problems like catastrophic forgetting, changing transition dynamics, changing rewards functions, etc. have been well-studied in the lifelong learning literature, the setting where the size of the action set changes remains unaddressed. In this paper, we present first steps towards developing an algorithm that autonomously adapts to an action set whose size changes over time. To tackle this open problem, we break it into two problems that can be solved iteratively: inferring the underlying, unknown, structure in the space of actions and optimizing a policy that leverages this structure. We demonstrate the efficiency of this approach on large-scale real-world lifelong learning problems.

Monuments of the Hittite and Neo-Assyrian Empires During the Late Bronze and Iron Ages

2017 ◽  
Author(s):  
James F. Osborne
Keyword(s):  
Recent Work ◽  
Signaling Theory ◽  
The Other ◽  
Costly Signaling ◽  
Evolutionary Anthropology ◽  
Costly Signaling Theory ◽  
Changes Over Time ◽  
Over Time

Chapter 5 engages with the Hittite and Assyrian monuments that are some of our oldest as well as most spectacular evidence for communications. For his discussion, Osborne exploits two interpretative concepts, one that he terms “relationality,” and the other, known as “costly signaling theory,” imported from recent work in evolutionary anthropology. Relationality calls for reckoning with changes over time in how a monument communicates messages and how it is perceived; costly signaling theory serves to explain why some monuments communicate more effectively if they are large and expensive. Both concepts assist in analyzing the ideological content of the monumental royal sculptures that form Osborne’s focus.

scholarly journals Responses of pregnant ewes and young lambs to ovalbumin immunization, antiovalbumin antibody transfer to lambs, and temporal changes in antiovalbumin antibody1,2

2017 ◽  
Vol 1 (4) ◽  
pp. 585-591
Author(s):  
G. S. Lewis ◽  
S. Wang ◽  
J. B. Taylor
Keyword(s):  
Immune Response ◽  
Late Pregnancy ◽  
The Other ◽  
Factors Affecting ◽  
Time Interaction ◽  
Injection Type ◽  
Neonatal Lambs ◽  
Changes Over Time ◽  
Over Time ◽  
Original Type

Abstract Factors affecting the decay of maternally derived IgG and ability of neonatal lambs to produce protective amounts of their own IgG are not well understood. Thus, we conducted 3 experiments to quantify the 1) response of pregnant ewes to ovalbumin immunization, 2) antiovalbumin antibody (OV-IgG) transfer to lambs, 3) changes over time in OV-IgG in lambs, and 4) response of young lambs to ovalbumin immunization. In Exp. 1, ewes (n = 10/group) either received control (adjuvant + saline) or ovalbumin (ovalbumin + adjuvant + saline) injections at ≈ 42 and 14 d prepartum. Ovalbumin increased (P &lt; 0.001) ewe serum and colostrum OV-IgG. Serum OV-IgG was greater (P &lt; 0.0001) in lambs from ovalbumin-treated than in lambs from control ewes. In Exp. 2, lambs (n = 20/group), which were from ewes that had received ovalbumin prepartum, were given either control or ovalbumin injections on d 1 and 15 of age. From d 1 to 15, maternally derived OV-IgG was less (P &lt; 0.04) in ovalbumin-treated than in control lambs. After d 15, OV-IgG was greater (P &lt; 0.001) in ovalbumin-treated than in control lambs. In Exp. 3, lambs (n = 20/group), which were from ewes naïve to ovalbumin, received 1 of 4 treatments: 1) d-1 + d-15 control injections; 2) d-1 + d-15 ovalbumin; 3) d-28 + d-42 control; and 4) d-28 + d-42 ovalbumin. In d-1 + d-15 ovalbumin lambs, OV-IgG increased (P &lt; 0.001) from d 7 to 21 after treatment and then decreased (P &lt; 0.004) after d 28. In d-28 + d-42 ovalbumin lambs, OV-IgG increased (P &lt; 0.001) steadily until d 21 after treatment and then stabilized after d 21. At ≈ 159 d of age, lambs in each group received injections consistent with their original type. After the d-159 treatment, ovalbumin injection increased (P &lt; 0.0001) OV-IgG, and the injection type × time interaction was significant (P &lt; 0.0001). In d-28 + d-42 ovalbumin lambs, OV-IgG just before the d-159 injections was greater (P &lt; 0.006) than that in the other groups. In this study, late pregnant ewes produced OV-IgG after ovalbumin injections and then transferred OV-IgG to lambs via colostrum. Ovalbumin treatment of young lambs reduced circulating maternally derived OV-IgG, but it also induced an immune response in the lambs. Overall, our results support recommendations to vaccinate ewes against common pathogens during late pregnancy and to ensure that lambs receive adequate colostrum soon after birth.

A content analysis of the portrayal of alcohol in televised music videos in New Zealand: Changes over time

2012 ◽  
Vol 32 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Kate Sloane ◽  
Nick Wilson ◽  
Fiona Imlach Gunasekara
Keyword(s):  
Content Analysis ◽  
New Zealand ◽  
Music Videos ◽  
Changes Over Time ◽  
Over Time

scholarly journals Concept Drift Detection in Dynamic Probabilistic Relational Models

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Nils Finke ◽  
Tanya Braun ◽  
Marcel Gehrke ◽  
Ralf Möller
Keyword(s):  
Real World ◽  
Joint Distribution ◽  
Concept Drift ◽  
Probability Distributions ◽  
Real World Data ◽  
Relational Models ◽  
World Data ◽  
Probabilistic Relational Models ◽  
Changes Over Time ◽  
Over Time

Dynamic probabilistic relational models, which are factorized w.r.t. a full joint distribution, are used to cater for uncertainty and for relational and temporal aspects in real-world data. While these models assume the underlying temporal process to be stationary, real-world data often exhibits non-stationary behavior where the full joint distribution changes over time. We propose an approach to account for non-stationary processes w.r.t. to changing probability distributions over time, an effect known as concept drift. We use factorization and compact encoding of relations to efficiently detect drifts towards new probability distributions based on evidence.

scholarly journals THE COMPETITIVENESS OF INDONESIA'S EXPORT TO UNITED STATES, 1986-2003: A SHIFT-SHARE ANALYSIS

2007 ◽  
Vol 8 (1) ◽  
pp. 36
Author(s):  
Ahmad Helmy Fuady
Keyword(s):  
United States ◽  
Economic Crisis ◽  
The United States ◽  
The Other ◽  
Republic Of Korea ◽  
Single Digit ◽  
The Us ◽  
Asian Economies ◽  
Changes Over Time ◽  
Over Time

The objective of this paper is to examine the competitiveness of Indonesia's exports to the United States (US) market, compared to other Asian economies, namely Thailand, Malaysia, Singapore, China, Republic of Korea and India, over the period of 1986-2003. A shift-share method is applied to single digit SITC US imports data from those countries. It found that the competitiveness of Indonesia's exports changes over time. The Indonesia's exports reached its best performance in the period 1992-1997. However, after the 1997 economic crisis, Indonesia faces a serious problem, since none of its export has competitiveness in the US market, compared to the reference economy. The analysis also shows that China has consistently posed a serious pressure not only for Indonesia, but also for the other Asian economies.

scholarly journals Inspecting Gradual and Abrupt Changes in Emotion Dynamics With the Time-Varying Change Point Autoregressive Model

2020 ◽  
Vol 36 (3) ◽  
pp. 492-499
Author(s):  
Casper J. Albers ◽  
Laura F. Bringmann
Keyword(s):  
Negative Affect ◽  
Positive Affect ◽  
Change Point ◽  
A Priori ◽  
Ar Model ◽  
Time Varying ◽  
Abrupt Changes ◽  
Emotion Dynamics ◽  
Changes Over Time ◽  
Over Time

Abstract. Recent studies have shown that emotion dynamics such as inertia (i.e., autocorrelation) can change over time. Importantly, current methods can only detect either gradual or abrupt changes in inertia. This means that researchers have to choose a priori whether they expect the change in inertia to be gradual or abrupt. This will leave researchers in the dark regarding when and how the change in inertia occurred. Therefore in this article, we use a new model: the time-varying change point autoregressive (TVCP-AR) model. The TVCP-AR model can detect both gradual and abrupt changes in emotion dynamics. More specifically, we show that the inertia of positive affect and negative affect measured in one individual differs qualitatively in how it changes over time. Whereas the inertia of positive affect increased only gradually over time, negative affect changed both in a gradual and abrupt fashion over time. This illustrates the necessity of being able to model both gradual and abrupt changes in order to detect meaningful quantitative and qualitative differences in temporal emotion dynamics.

Change Over Time in Australian Newspaper Reporting of Drinking During Pregnancy: A Content Analysis (2000–2017)

2020 ◽  
Vol 55 (6) ◽  
pp. 690-697 ◽  
Author(s):  
Megan Cook ◽  
Geoffrey Leggat ◽  
Amy Pennay
Keyword(s):  
Public Health ◽  
Content Analysis ◽  
News Media ◽  
Poisson Regression ◽  
Evidence Based ◽  
Poisson Regression Analysis ◽  
Media Messages ◽  
Newspaper Reporting ◽  
Changes Over Time ◽  
Over Time

Abstract Aims This paper analyses the content of news media messages on drinking during pregnancy in Australia over an 18-year period to understand whether and how the nature of messages communicated to women has changed over time. Methods Factiva was used to search Australian newspapers from 2000 to 2017, resulting in a sample of 1394 articles from the 18 major national and state-based newspapers. Content analysis of articles was undertaken, and Poisson regression analysis was used to assess changes over time. Results The largest number of articles on drinking during pregnancy was published in 2007. Themes that significantly increased over time included Harms to the Child (from 0.97% in 2008 to 29.69% in 2015) and Prevention Initiatives (from 0% in 2005 to 12.50% in 2017). Articles endorsing women not consuming alcohol during pregnancy significantly increased over time (from 20.69% in 2001 to 53.78% in 2013), matched by a decreasing trend in the proportion of articles presenting mixed advice (from 15.93% in 2009 to 0% in 2017). The largest number of articles adopted no position in relation to women’s consumption. Conclusions A stronger abstinence message during pregnancy has been communicated through Australian newspaper media over time. The mixed messaging and large number of articles not endorsing a position on consumption may reflect the inconclusiveness of the evidence on harms from low to moderate levels of alcohol consumption during pregnancy. Opportunities remain for researchers to work with public health advocates to disseminate balanced messages based on evidence-based research.

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