K-EmoCon, a multimodal sensor dataset for continuous emotion recognition in naturalistic conversations

Abstract Recognizing emotions during social interactions has many potential applications with the popularization of low-cost mobile sensors, but a challenge remains with the lack of naturalistic affective interaction data. Most existing emotion datasets do not support studying idiosyncratic emotions arising in the wild as they were collected in constrained environments. Therefore, studying emotions in the context of social interactions requires a novel dataset, and K-EmoCon is such a multimodal dataset with comprehensive annotations of continuous emotions during naturalistic conversations. The dataset contains multimodal measurements, including audiovisual recordings, EEG, and peripheral physiological signals, acquired with off-the-shelf devices from 16 sessions of approximately 10-minute long paired debates on a social issue. Distinct from previous datasets, it includes emotion annotations from all three available perspectives: self, debate partner, and external observers. Raters annotated emotional displays at intervals of every 5 seconds while viewing the debate footage, in terms of arousal-valence and 18 additional categorical emotions. The resulting K-EmoCon is the first publicly available emotion dataset accommodating the multiperspective assessment of emotions during social interactions.

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A low-cost wireless endoscope camera: a preliminary report

African Journal of Urology ◽

10.1186/s12301-021-00127-z ◽

2021 ◽

Vol 27 (1) ◽

Author(s):

J. M. Lazarus ◽

M. Ncube

Keyword(s):

Minimally Invasive Surgery ◽

Minimally Invasive ◽

Video Transmission ◽

Low Cost ◽

Battery Life ◽

Resource Constrained ◽

High Definition ◽

Industry Standard ◽

Constrained Environments ◽

The Cost

Abstract Background Technology currently used for surgical endoscopy was developed and is manufactured in high-income economies. The cost of this equipment makes technology transfer to resource constrained environments difficult. We aimed to design an affordable wireless endoscope to aid visualisation during rigid endoscopy and minimally invasive surgery (MIS). The initial prototype aimed to replicate a 4-mm lens used in rigid cystoscopy. Methods Focus was placed on using open-source resources to develop the wireless endoscope to significantly lower the cost and make the device accessible for resource-constrained settings. An off the shelf miniature single-board computer module was used because of its low cost (US$10) and its ability to handle high-definition (720p) video. Open-source Linux software made monitor mode (“hotspot”) wireless video transmission possible. A 1280 × 720 pixel high-definition tube camera was used to generate the video signal. Video is transmitted to a standard laptop computer for display. Bench testing included latency of wireless digital video transmission. Comparison to industry standard wired cameras was made including weight and cost. The battery life was also assessed. Results In comparison with industry standard cystoscope lens, wired camera, video processing unit and light source, the prototype costs substantially less. (US$ 230 vs 28 000). The prototype is light weight (184 g), has no cables tethering and has acceptable battery life (of over 2 h, using a 1200 mAh battery). The camera transmits video wirelessly in near real time with only imperceptible latency of < 200 ms. Image quality is high definition at 30 frames per second. Colour rendering is good, and white balancing is possible. Limitations include the lack of a zoom. Conclusion The novel wireless endoscope camera described here offers equivalent high-definition video at a markedly reduced cost to contemporary industry wired units and could contribute to making minimally invasive surgery possible in resource-constrained environments.

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Visualization of Surface Acoustic Waves in Thin Liquid Films

Scientific Reports ◽

10.1038/srep21980 ◽

2016 ◽

Vol 6 (1) ◽

Cited By ~ 20

Author(s):

R. W. Rambach ◽

J. Taiber ◽

C. M. L. Scheck ◽

C. Meyer ◽

J. Reboud ◽

...

Keyword(s):

Liquid Film ◽

Acoustic Waves ◽

Low Cost ◽

Thin Liquid Film ◽

Surface Acoustic Waves ◽

Liquid Films ◽

Theoretical Description ◽

Propagation Path ◽

Microfluidic Channels ◽

Potential Applications

Abstract We demonstrate that the propagation path of a surface acoustic wave (SAW), excited with an interdigitated transducer (IDT), can be visualized using a thin liquid film dispensed onto a lithium niobate (LiNbO3) substrate. The practical advantages of this visualization method are its rapid and simple implementation, with many potential applications including in characterising acoustic pumping within microfluidic channels. It also enables low-cost characterisation of IDT designs thereby allowing the determination of anisotropy and orientation of the piezoelectric substrate without the requirement for sophisticated and expensive equipment. Here, we show that the optical visibility of the sound path critically depends on the physical properties of the liquid film and identify heptane and methanol as most contrast rich solvents for visualization of SAW. We also provide a detailed theoretical description of this effect.

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Recent Findings in Azaphilone Pigments

Journal of Fungi ◽

10.3390/jof7070541 ◽

2021 ◽

Vol 7 (7) ◽

pp. 541

Author(s):

Lúcia P. S. Pimenta ◽

Dhionne C. Gomes ◽

Patrícia G. Cardoso ◽

Jacqueline A. Takahashi

Keyword(s):

Water Solubility ◽

Biological Activities ◽

Low Cost ◽

Scale Up ◽

Structural Diversity ◽

Downstream Processing ◽

Global Market ◽

Yield Improvement ◽

Potential Applications ◽

New Compounds

Filamentous fungi are known to biosynthesize an extraordinary range of azaphilones pigments with structural diversity and advantages over vegetal-derived colored natural products such agile and simple cultivation in the lab, acceptance of low-cost substrates, speed yield improvement, and ease of downstream processing. Modern genetic engineering allows industrial production, providing pigments with higher thermostability, water-solubility, and promising bioactivities combined with ecological functions. This review, covering the literature from 2020 onwards, focuses on the state-of-the-art of azaphilone dyes, the global market scenario, new compounds isolated in the period with respective biological activities, and biosynthetic pathways. Furthermore, we discussed the innovations of azaphilone cultivation and extraction techniques, as well as in yield improvement and scale-up. Potential applications in the food, cosmetic, pharmaceutical, and textile industries were also explored.

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Color-Variable Photodynamic Antimicrobial Wool/Acrylic Blended Fabrics

Materials ◽

10.3390/ma13184141 ◽

2020 ◽

Vol 13 (18) ◽

pp. 4141

Author(s):

Tingting Wang ◽

Wangbingfei Chen ◽

Tingting Dong ◽

Zihao Lv ◽

Siming Zheng ◽

...

Keyword(s):

Low Cost ◽

Pathogen Transmission ◽

Cationic Dyes ◽

Light Illumination ◽

Antibacterial Studies ◽

Wool Fibers ◽

Visible Light Illumination ◽

Potential Applications ◽

Dyed Fabrics ◽

Acrylic Fibers

Towards the goal of developing scalable, economical and effective antimicrobial textiles to reduce infection transmission, here we prepared color-variable photodynamic materials comprised of photosensitizer (PS)-loaded wool/acrylic (W/A) blends. Wool fibers in the W/A blended fabrics were loaded with the photosensitizer rose bengal (RB), and the acrylic fibers were dyed with a variety of traditional cationic dyes (cationic yellow, cationic blue and cationic red) to broaden their color range. Investigations on the colorimetric and photodynamic properties of a series of these materials were implemented through CIELab evaluation, as well as photooxidation and antibacterial studies. Generally, the photodynamic efficacy of these dual-dyed fabrics was impacted by both the choice, and how much of the traditional cationic dye was employed in the dyeing of the W/A fabrics. When compared with the PS-only singly-dyed material, RB-W/A, that showed a 99.97% (3.5 log units; p = 0.02) reduction of Staphylococcus aureus under visible light illumination (λ ≥ 420 nm, 60 min), the addition of cationic dyes led to a slight decrease in the photoinactivation ability of the dual-dyed fabrics, but was still able to achieve a 99.3% inactivation of S. aureus. Overall, our findings demonstrate the feasibility and potential applications of low cost and color variable RB-loaded W/A blended fabrics as effective self-disinfecting textiles against pathogen transmission.

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Synthesis and characterization of hyperbranched poly (sulfone-amine) modified β-cyclodextrin

e-Polymers ◽

10.1515/epoly.2006.6.1.591 ◽

2006 ◽

Vol 6 (1) ◽

Author(s):

Liang Chen ◽

Peng He ◽

Zhifeng Jia ◽

Xinyuan Zhu ◽

Deyue Yan

Keyword(s):

Drug Delivery ◽

Low Cost ◽

Food Additives ◽

Synthesis And Characterization ◽

Good Solubility ◽

Low Viscosity ◽

Hyperbranched Poly ◽

Potential Applications ◽

Inclusion Ability

AbstractAn economical strategy to prepare hyperbranched poly(sulfone-amine) modified β-cyclodextrins (HPSA-m-CDs) from natural β-cyclodextrin (β-CD) and other commercially available materials has been reported. The final product has many good properties of hyperbranched poly(sulfone-amine)s (good solubility, low viscosity etc.), while its inclusion ability can also be well kept. It is a feasible approach to prepare functionalized modified cyclodextrin at very low cost, and may have potential applications in the fields of catalysis, drug delivery, food additives, etc.

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A review of passive self-sensing tag

Sensor Review ◽

10.1108/sr-01-2017-0001 ◽

2017 ◽

Vol 37 (3) ◽

pp. 338-345 ◽

Cited By ~ 4

Author(s):

Yawei Xu ◽

Lihong Dong ◽

Haidou Wang ◽

Jiannong Jing ◽

Yongxiang Lu

Keyword(s):

Radio Frequency Identification ◽

Large Scale ◽

Low Cost ◽

Integrated Sensor ◽

Content Type ◽

Passive Sensing ◽

Static Information ◽

Potential Applications ◽

Frequency Identification ◽

Identification Tags

Purpose Radio frequency identification tags for passive sensing have attracted wide attention in the area of Internet of Things (IoT). Among them, some tags can sense the property change of objects without an integrated sensor, which is a new trend of passive sensing based on tag. The purpose of this paper is to review recent research on passive self-sensing tags (PSSTs). Design/methodology/approach The PSSTs reported in the past decade are classified in terms of sensing mode, composition and the ways of power supply. This paper presents operation principles of PSSTs and analyzes the characteristics of them. Moreover, the paper focuses on summarizing the latest sensing parameters of PSSTs and their matching equipment. Finally, some potential applications and challenges faced by this emerging technique are discussed. Findings PSST is suitable for long-term and large-scale monitoring compared to conventional sensors because it gets rid of the limitation of battery and has relatively low cost. Also, the static information of objects stored in different PSSTs can be identified by a single reader without touch. Originality/value This paper provides a detailed and timely review of the rapidly growing research in PSST.

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Sintering and Hot-Pressing of Ti2AlC Obtained by SHS Process

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.63.282 ◽

2010 ◽

Vol 63 ◽

pp. 282-286 ◽

Cited By ~ 7

Author(s):

Leszek Chlubny ◽

Jerzy Lis ◽

Mirosław M. Bućko

Keyword(s):

Hot Pressing ◽

High Efficiency ◽

Layer Structure ◽

Low Cost ◽

Max Phases ◽

Fine Powders ◽

High Temperature Synthesis ◽

Low Energy Consumption ◽

Potential Applications ◽

Xrd Method

Some of ternary materials in the Ti-Al-C system are called MAX-phases and are characterised by heterodesmic layer structure. Their specific structure consisting of covalent and metallic chemical bonds influence its semi-ductile features locating them on the boundary between metals and ceramics, which may lead to many potential applications, for example as a part of a ceramic armour. Ti2AlC is one of this nanolaminate materials. Self-propagating High-temperature Synthesis (SHS) was applied to obtain sinterable powders of Ti2AlC Utilization of heat produced in exothermal reaction in adiabatic conditions to sustain process until all substrates are transformed into product is one of the advantages of the method that result in low energy consumption and low cost combined with high efficiency. Different substrates were used to produce fine powders of ternary material. Phase compositions of obtained powder were examined by XRD method. Than selected powders were used for sintering in various temperature both in a presureless sintering and hot-pressing in argon atmosphere. Properties and phase composition of obtained products were examined.

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Pseudoelasticity of Cu-13.8Al-Ni Alloys Containing V and Nb

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.59.101 ◽

2008 ◽

Vol 59 ◽

pp. 101-107 ◽

Cited By ~ 3

Author(s):

Rodinei Medeiros Gomes ◽

Ana Cris R. Veloso ◽

V.T.L. Buono ◽

Severino Jackson Guedes de Lima ◽

Tadeu Antonio de Azevedo Melo

Keyword(s):

Mechanical Properties ◽

Shape Memory ◽

Shape Recovery ◽

Cold Water ◽

Low Cost ◽

Tensile Tests ◽

Grain Refiner ◽

Good Shape ◽

Potential Applications ◽

Superelastic Behavior

Polycrystalline copper-based shape memory alloys have been of particular interest in relation to Ni-Ti because of their low cost and good shape memory effect. Nevertheless the absence of a pronounced pseudoelasticity effect restricts the number of potential applications. In this work, the influence of Nb and V on the microstructure and the mechanical properties was investigated. Samples of Cu-13.8 Al-Ni containing V and Nb alloy were prepared by induction and solution treated at 850°C and then further quenched into cold water. The addition of Nb and V promotes the formation of precipitates which act as grain refiner and subsequently improve the mechanical properties. The tensile tests were performed at temperatures slightly inferior to Mf and superior to Af, to investigate the shape recovery and pseudoelasticity, respectively. Based on the analyses of the Cu-13,8Al-2Ni-1Nb (wt%) alloy was detected rupture strains greater than 14%, besides observation of the superelasticity of these alloys and quantification of this property by means of cycling, from 0 to strains between 1 and 7%. The studies performed on alloy Cu-13.8Al- 3,5Ni-1V (wt%) made it possible to determine rupture strains in the order of 3% and its superelastic behavior through cycling for deformations between 1 and 3%.

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A Novel, Low-Cost C-C Composite Heat Sink Material

MRS Proceedings ◽

10.1557/proc-445-57 ◽

1996 ◽

Vol 445 ◽

Author(s):

W. Kowbel ◽

V. Chellappa ◽

J.C. Withers

Keyword(s):

Thermal Conductivity ◽

Heat Sink ◽

Low Cost ◽

Mechanical And Thermal Properties ◽

New Class ◽

Dielectric Coatings ◽

Potential Applications ◽

New Material ◽

New Type ◽

Composite Heat

AbstractRapid advances in high power electronics packaging require the development of new heat sink materials. Advanced composites designed to provide thermal expansion control as well as improved thermal conductivity have the potential to provide benefits in the removal of excess heat from electronic devices. Carbon-carbon (C-C) composits are under consideration for several military and space electronic applications including SEM-E electronic boxes. The high cost of C-C composits has greatly hindered their wide spread commercialization. A new manufacturing process has been developed to produce high thermal conductivity (over 400 W/mK) C-C composites at greatly reduced cost (less than $50/lb). This new material has potential applications as both a heat sink and a substrate. Dielectric coatings such as A1N and diamond were applied to this new type of heat sink material. Processing, as well as mechanical and thermal properties of this new class of heat sink material will be presented.

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Advances in preparation, modification, and application of polypropylene membrane

Journal of Polymer Engineering ◽

10.1515/polyeng-2015-0112 ◽

2016 ◽

Vol 36 (4) ◽

pp. 329-362 ◽

Cited By ~ 65

Author(s):

Nurul F. Himma ◽

Sofiatun Anisah ◽

Nicholaus Prasetya ◽

I Gede Wenten

Keyword(s):

Thermal Stability ◽

High Performance ◽

Chemical Resistance ◽

Low Cost ◽

Comprehensive Overview ◽

Preparation Methods ◽

Good Thermal Stability ◽

Polypropylene Membrane ◽

Membrane Fabrication ◽

Potential Applications

Abstract Polypropylene (PP) is one of the most used polymers for microporous membrane fabrication due to its good thermal stability, chemical resistance, mechanical strength, and low cost. There have been numerous studies reporting the developments and applications of PP membranes. However, PP membrane with high performance is still a challenge. Thus, this article presents a comprehensive overview of the advances in the preparation, modification and application of PP membrane. The preparation methods of PP membrane are firstly reviewed, followed by the modification approaches of PP membrane. The modifications includes hydrophilic and superhydrophobic modification so that the PP membranes become more suitable to be applied either in aqueous applications or in non-aqueous ones. The fouling resistant of hydrophilized PP membrane and the wetting resistant of superhydrophobized PP membrane are then reviewed. Finally, special attention is given to the various potential applications and industrial outlook of the PP membranes.

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