This article deals with the design and implementation of an immersive installation where users could gesturally navigate around the wreck of Vrouw Maria, a Dutch merchant ship that sank near the Finnish coast in 1771 ...
详细信息
This article deals with the design and implementation of an immersive installation where users could gesturally navigate around the wreck of Vrouw Maria, a Dutch merchant ship that sank near the Finnish coast in 1771 and was rediscovered in 1999. The installation was built for the Maritime Museum in Kotka, Finland, and is part of the preservation efforts of the wreck, which still remains underwater. In addition to the cultural heritage aspect, the project was an experiment in holistic user-centered design, where several design methods, such as scenarios, role playing and informance, storyboards, and prototyping, were employed throughout the process in order to envision the final product as well as assess their utility in the scope of immersive installations. The approach we have taken and documented here can be used as a starting point for similar projects where archaeological sites are reconstructed virtually and presented, for example, in a museum setting.
Computational systems for generating expressive musical performances have been studied for several decades now. These models are generally evaluated by comparing their predictions with actual performances, both from a...
详细信息
Computational systems for generating expressive musical performances have been studied for several decades now. These models are generally evaluated by comparing their predictions with actual performances, both from a performance parameter and a subjective point of view, often focusing on very specific aspects of the model. However, little is known about how listeners evaluate the generated performances and what factors influence their judgement and appreciation. In this article, we present two studies, conducted during two dedicated workshops, to start understanding how the audience judges entire performances employing different approaches to generating musical expression. In the preliminary study, 40 participants completed a questionnaire in response to five different computer-generated and computer-assisted performances, rating preference and describing the expressiveness of the performances. In the second, "GATM" (Gruppo di Analisi e Teoria Musicale) study, 23 participants also completed the Music Cognitive Style questionnaire. Results indicated that music systemizers tend to describe musical expression in terms of the formal aspects of the music, and music empathizers tend to report expressiveness in terms of emotions and characters. However, high systemizers did not differ from high empathizers in their mean preference score across the five pieces. We also concluded that listeners tend not to focus on the basic technical aspects of playing when judging computer-assisted and computer-generated performances. Implications for the significance of individual differences in judging musical expression are discussed.
Affect detection is an important pattern recognition problem that has inspired researchers from several areas. The field is in need of a systematic review due to the recent influx of Multimodal (MM) affect detection s...
详细信息
Affect detection is an important pattern recognition problem that has inspired researchers from several areas. The field is in need of a systematic review due to the recent influx of Multimodal (MM) affect detection systems that differ in several respects and sometimes yield incompatible results. This article provides such a survey via a quantitative review and meta-analysis of 90 peer-reviewed MM systems. The review indicated that the state of the art mainly consists of person-dependent models (62.2% of systems) that fuse audio and visual (55.6%) information to detect acted (52.2%) expressions of basic emotions and simple dimensions of arousal and valence (64.5%) with feature-(38.9%) and decision-level (35.6%) fusion techniques. However, there were also person-independent systems that considered additional modalities to detect nonbasic emotions and complex dimensions using model-level fusion techniques. The meta-analysis revealed that MM systems were consistently (85% of systems) more accurate than their best unimodal counterparts, with an average improvement of 9.83% (median of 6.60%). However, improvements were three times lower when systems were trained on natural (4.59%) versus acted data (12.7%). Importantly, MM accuracy could be accurately predicted (cross-validated R-2 of 0.803) from unimodal accuracies and two system-level factors. Theoretical and applied implications and recommendations are discussed.
Intra-arterial therapies (IATs) play a pivotal role in the management of patients with primary and secondary liver malignancies. The unique advantages of these treatments are their ability to selectively deliver a hig...
详细信息
Intra-arterial therapies (IATs) play a pivotal role in the management of patients with primary and secondary liver malignancies. The unique advantages of these treatments are their ability to selectively deliver a high dose of anticancer treatment while preserving healthy liver tissue. The proven efficacy of these catheter-based locoregional therapies in a highly systemic chemoresistant cancer such as hepatocellular carcinoma (HCC), along with the minimally invasive nature of these treatments, quickly yielded wide acceptance in themedical community and revolutionized the field of Interventional Oncology. In this article, we describe the clinical rationale and background of catheter-based IATs. We provide an overview of clinical achievements of these treatments alone and in combination with sorafenib in patients with HCC.
Background: Clinical decision support (CDS) tools improve clinical diagnostic decision making and patient safety. The availability of CDS to health care professionals has grown in line with the increased prevalence of...
详细信息
Background: Clinical decision support (CDS) tools improve clinical diagnostic decision making and patient safety. The availability of CDS to health care professionals has grown in line with the increased prevalence of apps and smart mobile devices. Despite these benefits, patients may have safety concerns about the use of mobile devices around medical equipment. Objective: This research explored the engagement of junior doctors (JDs) with CDS and the perceptions of patients about their use. There were three objectives for this research: (1) to measure the actual usage of CDS tools on mobile devices (mCDS) by JDs, (2) to explore the perceptions of JDs about the drivers and barriers to using mCDS, and (3) to explore the perceptions of patients about the use of mCDS. Methods: This study used a mixed-methods approach to study the engagement of JDs with CDS accessed through mobile devices. Usage data were collected on the number of interactions by JDs with mCDS. The perceived drivers and barriers for JDs to using CDS were then explored by interviews. Finally, these findings were contrasted with the perception of patients about the use of mCDS by JDs. Results: Nine of the 16 JDs made a total of 142 recorded interactions with the mCDS over a 4-month period. Only 27 of the 114 interactions (24%) that could be categorized as on-shift or off-shift occurred on-shift. Eight individual, institutional, and cultural barriers to engagement emerged from interviews with the user group. In contrast to reported cautions and concerns about the impact of clinicians' use of mobile phone on patient health and safety, patients had positive perceptions about the use of mCDS. Conclusions: Patients reported positive perceptions toward mCDS. The usage of mCDS to support clinical decision making was considered to be positive as part of everyday clinical practice. The degree of engagement was found to be limited due to a number of individual, institutional, and cultural barriers. The majority of
In this paper, the performance of space vector pulse width modulation (SVPWM), sinusoidal pulse width modulation (SPWM) and hysteresis current control (HCC) control techniques used in power control with back to back c...
详细信息
In this paper, the performance of space vector pulse width modulation (SVPWM), sinusoidal pulse width modulation (SPWM) and hysteresis current control (HCC) control techniques used in power control with back to back converter of permanent magnet synchronous generator used in wind turbines are comparatively analyzed in terms of dynamic response, total harmonic distortion (THD), torque ripple and current ripple. Furthermore, SVPWM and SPWM are compared in terms of the using DC link voltage. Analysis of system is realized with MATLAB/Simulink program. There is not paper that together of these three control techniques are compared in terms of common results or values in literature. Permanent magnet synchronous generator (PMSG) is used in simulations is surface mounted, bipolar and its power is 1.8 kW. However, PMSM's energy transmission to grid is made with Field Oriented Control (FOC). According to analysis results, it has been observed that SVPWM generally has more efficient results than both HCC and SPWM control technique. Also, it is observed that SVPWM can produce about 15 percent higher than SPWM in output voltage.
As counterpoint to the authors" previous discussions of the "seven deadly myths" of autonomous systems, here they present seven design principles to be understood and embraced for the virtues they engen...
详细信息
As counterpoint to the authors" previous discussions of the "seven deadly myths" of autonomous systems, here they present seven design principles to be understood and embraced for the virtues they engender.
We examine how haptic feedback could enable an implicit human-computer interaction, in the context of an audio stream listening use case where a device monitors a user's electrodermal activity for orienting respon...
详细信息
We examine how haptic feedback could enable an implicit human-computer interaction, in the context of an audio stream listening use case where a device monitors a user's electrodermal activity for orienting responses to external interruptions. When such a response is detected, our previously developed system automatically places a bookmark in the audio stream for later resumption of listening. Here, we investigate two uses of haptic feedback to support this implicit interaction and mitigate effects of noisy (false-positive) bookmarking: (a) low-attention notification when a bookmark is placed, and (b) focused-attention display of bookmarks during resumptive navigation. Results show that haptic notification of bookmark placement, when paired with visual display of bookmark location, significant improves navigation time. Solely visual or haptic display of bookmarks elicited equivalent navigation time;however, only the inclusion of haptic display significantly increased accuracy. Participants preferred haptic notification over no notification at interruption time, and combined haptic and visual display of bookmarks to support navigation to their interrupted location at resumption time. Our contributions include an approach to handling noisy data in implicit HCI, an implementation of haptic notifications that signal implicit system behavior, and discussion of user mental models that may be active in this context.
Most users do not understand why Web applications behave the way they do and what providers do with user data. Although some network-related aspects of application behavior will always be invisible to users, making ap...
详细信息
Most users do not understand why Web applications behave the way they do and what providers do with user data. Although some network-related aspects of application behavior will always be invisible to users, making applications more transparent will increase their utility and trustworthiness.
Researchers from sociological disciplines could greatly benefit from collective information from the many people who use mobile devices to communicate via various social apps and services. However, processing that inf...
详细信息
Researchers from sociological disciplines could greatly benefit from collective information from the many people who use mobile devices to communicate via various social apps and services. However, processing that information is difficult because it's scattered among numerous social platforms. Furthermore, users are becoming increasingly concerned about how and by whom their information is being accessed. A new mobile-centric computing model allows sociological profiles of people to be generated, kept, and securely provided to third parties as a service. With this model, device owners can be fully aware and in control of how their information is accessed, while still contributing to collective sociological information. [ABSTRACT FROM PUBLISHER]
暂无评论