• Title/Summary/Keyword: AR

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Development of Evaluation Scheme for Usability of AR/VR Contents (AR/VR 콘텐츠의 사용성 평가 체계 개발)

  • Han, Sumin;Jeong, Hanil;Lee, Hoijun;Lee, Jaeyoung
    • Journal of Convergence for Information Technology
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    • v.11 no.3
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    • pp.236-249
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    • 2021
  • Due to the spread of AR/VR headset, AR/VR contents market gains huge interests. However, various obstacles such as discomfort that restricts usability and absence of standard to evaluate usability block the growth of AR/VR contents industry. To overcome these problems, this study tries to develop an evaluation scheme for the usability of R/VR contents and a prototype system. The proposed evaluation system divides usability related items into safety and convenience items and performs evaluation by item through automatic and experience evaluation by system and experts/experience teams according to characteristics, and comprehensively evaluates the usability of AR/VR content. In this study, a detailed process fo usability evaluation and the prototype system are developed to verify the evaluation scheme. Developed scheme is expected to help the AR/VR content industry overcome the usability issues, and develop high-quality AR/VR content.

The Effect of Augmented Reality Journalism on Immersion and Information Acquisition in Chinese Disaster and Sports News (AR 뉴스의 특성이 수용자의 몰입도 및 정보습득에 미치는 영향 - 중국의 재해, 스포츠 보도를 중심으로)

  • Liu, Jia Ni;Lee, Yoon;Lee, Hye Eun
    • The Journal of the Korea Contents Association
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    • v.21 no.2
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    • pp.474-488
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    • 2021
  • The application of Augmented Reality(AR) technology is visible in medical procedures, education, marketing, and journalism. By experimenting, this study examines how the evaluation of the three elements of augmented reality news contents(visual image, storytelling, interactivity) affects immersion and information acquisition. Specifically, a 2 (video technology: AR vs. general) × 2 (news type: disaster vs. sports) between-subject design was examined. Results showed that the evaluation of all three elements was higher when viewing AR news than when viewing general news. The level of immersion was higher when viewing AR news, and the evaluation of storytelling and interactivity had positive effect on the level of immersion regardless of the news types. However, the evaluation of visual images did not affect the level of immersion. Information acquisition was higher after viewing AR news, yet the effect of the evaluation of the three elements on information acquisition had not been found. Implication and discussion of the study were added in the end.

Estimation of Net Community Production Based on O2/Ar Measurements (O2/Ar 관측에 기반한 순군집생산량 추정 연구 동향)

  • HAHM, DOSHIK;LEE, INHEE
    • The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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    • v.23 no.1
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    • pp.49-62
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    • 2018
  • Net community production (NCP), defined as the difference between net primary production and respiration of heterotrophs, has been used as a measure of oceanic biological carbon pump. This paper summarizes the theoretical background and experimental methods for the estimation of NCP based on $O_2/Ar$ measurements ($O_2/Ar-NCP$). The high frequency measurements of $O_2/Ar-NCP$ (<1 min) is a significant enhancement over the conventional measures of biological pump, such as new production and export production. This paper also introduces some of important works as to the comparison between $O_2/Ar-NCP$ and other measures of biological pump, the distributions of $O_2/Ar-NCP$ in the oceans, and the correlation of $O_2/Ar-NCP$ with various oceanic parameters, including community structures.

GPS-based Augmented Reality System for Social Network Proposition (소셜 네트워크를 위한 GPS기반 증강현실 시스템 제안)

  • Liu, Jie;Jin, Seong-geun;Lee, Seong-Ok;Jung, Hoe-Kyung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2012.10a
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    • pp.903-905
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    • 2012
  • Recent research on Augmented Reality is Actively expand and Augmented reality feature added to the social network system (Social Network System) has become a necessity. In this paper, GPS-based Augmented Reality System for Social Network is introduced, is proposed. This system can add recent check-in friends in facebook by automatically to synchronizing the location coordinate, and it could also adding location coordinates system is represented in a real-world environment by AR, is Marker-based AR system that was Commonly used AR system is a huge cost by handheld devices in processing and storage space, the disadvantages of the marker-based AR systems can be solved by using Location-based AR applications. Therefore, the proposed GPS-based Augmented Reality System for Social Network, automatically searches for the optimal speed for Wifi and 4G network to iOS Hand AR system was desired in future.

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Simultaneous Determiniation of Ar/$N_2$Ratios in Groundwater (지하수에 용해된 질소, 아르곤 가스의 동시측정)

  • Kim, Euisik;Roy F. Spalding
    • Journal of the Korean Society of Groundwater Environment
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    • v.1 no.1
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    • pp.6-9
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    • 1994
  • Previously reported Ar/N$_2$ratios in groundwater have been measured by single ion monitoring (Barnes et al., 1975; Vogel et al., 1981; Mariotti et al., 1988). The detector geometry and flared flight tube in VG Optima isotopic ratio mass spectrometer appeared to be fortuitously aligned for the simultaneous measurement of Ar/N$_2$ratios. Method development included mechanical adjustments to optimize the mass spectrometer for Ar/N$_2$ratio measurements followed by development of a preparation system for the extraction of air-saturated water samples. Samples containing known Ar/N$_2$ratios were used to assess accuracy and precision, and to test the applicability of methods for measurements of aqueous Ar/N$_2$ratios. The results indicated that the prepared air-saturated water samples were almost identical to the predicted Ar/N$_2$ratios (p <0.001). Groundwater samples were collected from on-going research sites, Shelton and Grand Island, Nebraska. Samples from the Grand Island sludge injection site form a lower boundary for worldwide reported Ar/N$_2$ratios. These lower Ar/N$_2$ratios can be explained by the production of nitrogen gas from this site, where denitrification was reported previously.

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Structural,Magnetic, and Magnetoresistance Behavior of Magnetron Sputtered NiFe/Ag Multilayers under an Ar and $Ar/H_2$ Atmosphere (Ar 및 $Ar/H_2$ 분위기에서 스퍼터 증착한 NiFe/Ag 다층박막의 구조, 자기 및 자기저항 거동에 관한 연구)

  • 서유석;이성래
    • Journal of the Korean Magnetics Society
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    • v.9 no.3
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    • pp.159-165
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    • 1999
  • Structural, magnetic and magnetoresistance behavior of NiFe/Ag multilayers prepared by a magnetron sputter under an Ar and $Ar/H_2$ atmosphere was studied. It was difficult to make a uniform multilayer by using an Ar atmosphere. However, the uniform multilayers could be fabricated by using an $Ar/H_2$ atmosphere. This was thought to be due to decrease in the energy of the sputtered atom and Ar content of the film. Typical magnetoresistance behavior of the discontinuous NiFe/Ag multilayers appeared when the uniform multilayer was formed and annealed. Substrate temperature did not improve the uniformity of the multilayers. Above 20$0^{\circ}C$ of the substrate temperature, the films were almost formed into granular alloys rather than multilayers.

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A Study on the Carbothermic Reduction of Nb-Oxide and the refining by Ar/Ar-$H_2$ plasma and Hydrogen solubility of Nb metal (Ar/Ar-$H_2$ 플라즈마에 의한 Nb금속제조와 Nb금속의 수소용해)

  • Jeong, Yong-Seok;Hong, Jin-Seok;Kim, Mun-Cheol;Baek, Hong-Gu
    • Korean Journal of Materials Research
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    • v.3 no.6
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    • pp.565-574
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    • 1993
  • The Ar/Ar- $H_{2}$ plasma method Lvas applied to reduce and refine high purity Nb metal. Inaddition, the reaction between molten Nb metal and hydrogen were also analyzed in the Ar-(20%)$H_{2}$plasma. The metallic Nb of 99.5wt% was obtained at the ratio of $C/Nb_{2}O_{5}$=5.00 in the Ar plasma reductionand the $O_2$ loss from the thermal decomposition of niobium oxides did not take place. In the Ar-(20%)Hi plasma the metallic Nb of 99.8wt% was produced at the ratio of $C/Nb_{2}O_{5}$=4.80. It was observedthat a major reaction of the deoxidation was the reaction with H, Hi, and a deoxidation by the evaporationof $NbO_x$ did not occur but a mass loss of Nb did by a "splash" effect. The deoxidation reaction rateobeyed the 1st order reaction kinetics and the reaction rate constant(k') of deoxidation was $7.8 \times 10_{-7}$(m/sec).The solubility of hydrogen in Nb metal was 60ppm and it was larger than the solubility of molecularstate hydrogen by 40ppm in the Ar-(20%)$H_{2}$ plasma method. A saturation was within 60sec anda hydrogen content was reduced below lOppm by a Ar plasma re-treatment.by a Ar plasma re-treatment.

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Effects of Ar Addition on the Etch Rates and Etch Profiles of Si Substrates During the Bosch Process (Bosch 공정에서 Si 식각속도와 식각프로파일에 대한 Ar 첨가의 영향)

  • Ji, Jung Min;Cho, Sung-Woon;Kim, Chang-Koo
    • Korean Chemical Engineering Research
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    • v.51 no.6
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    • pp.755-759
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    • 2013
  • The etch rate and etch profile of Si was investigated when Ar was added to an $SF_6$ plasma in the etch step of the Bosch process. A Si substrate was etched with the Bosch process using $SF_6$ and $SF_6$/Ar plasmas, respectively, in the etch step to analyze the effects of Ar addition on the etch characteristics of Si. When the Ar flow rate in the $SF_6$ plasma was increased, the etch rate of the Si substrate increased, had a maximum at 20% of the Ar flow rate, and then decreased. This was because the addition of Ar to the $SF_6$ plasma in the etch step of the Bosch process resulted in the bombardment of Ar ions on the Si substrate. This enhanced the chemical reactions (thus etch rates) between F radicals and Si as well as led to sputtering of Si particles. Consequently, the etch rate was higher more than 10% and the etch profile was more anisotropic when the Si substrate was etched with the Bosch process using a $SF_6$/Ar (20% of Ar flow rate) plasma during the etch step. This work revealed a feasibility to improve the etch rate and anisotropic etch profile of Si performed with the Bosch process.

Improvement of Performance of Anti-reflective Coating Film Using Methyltrimethoxysilane (Methyltrimethoxysilane을 이용한 반사방지 코팅막의 성능 향상)

  • Keum, Young-Sub;Kim, Hyo-Sub;Park, Chu-Sik;Kim, Young-Ho
    • Applied Chemistry for Engineering
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    • v.26 no.4
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    • pp.400-405
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    • 2015
  • Traditional anti-reflective (AR) coating films prepared using tetraethylorthosilicate (TEOS) as a precursor absorbs water easily in addition to having a weak abrasion resistance. To improve the transmittance, hydrophobicity and abrasion resistance of AR coating film, various AR coating films were prepared using methyltrimethoxysilane (MTMS) as a precursor in addition to introducing a fluoroalkylsilane, acid catalyst, base catalyst and acid-base two step catalyst. The prepared AR coating films were then characterized by UV-Vis spectroscopy, contact angle analyzer, atomic force microscope (AFM), pencil scratch hardness test and cross-cut test. As a result, the transmittance of bare glass was 90.5%, while that of AR coating glass increased to 94.8% at curing temperature of $300^{\circ}C$. When the fluoroalkylsilane was added, the water contact angle of AR coating film increased from $96.3^{\circ}$ to $108^{\circ}$, indicating that the hydrophobicity of the film was greatly improved. The abrasion resistance of AR coating film was also improved by the acid catalyst, whereas the transmittance increased by the base catalyst. In the case of AR coating film prepared using an acid-base two step catalyzed reaction, both the transmittance and abrasion resistance of the film was synergistically enhanced as compared with those of AR coating films prepared without introduction of a catalyst.

The effect of ASTRACTYLODIS MACROCEPHALAE RHIZOMA, ASRTAGALI RADIX, SOLANI NIGRI HERBA on immune response and anti-allergic reaction (백출(白朮) 황(黃)기 용규(龍葵)의 면역조절작용(免疫調節作用) 및 알레르기 저감화(低減化)에 관(關)한 연구(硏究))

  • Seo Bu-Il;Kim Sun Hee;Park Sun-Dal;Lee Kuek Ro
    • Herbal Formula Science
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    • v.5 no.1
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    • pp.184-202
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    • 1997
  • The results of immune response and antiallergic reaction were as follows. 1. Hemagglutinin titer and hemolysin titer were increased in case of AMR, AR, SNH. But the results were not recognized as having significance. 2. PFC was increased in case of AMR, AR. But the results were not recognized as having significance. 3. RFC was increased in all groups, and the results in the AR, SNH were significant. 4. In experimentation of phagocytic activity in peritoneal exudate cells, AR and SNH showed significant increase. In spleen cells AR and SNH showed significant increase. In monolymphocytus cells AMR, AR and SNH were increased, but result of AMR was of no significance. 5. I examined promotion on spleen cells transformation. As these results, AMR showed increase in $50{\mu}g/m{\ell}$, $5000{\mu}g/m{\ell}$ in comparison with control group. And in $500{\mu}g/m{\ell}$ AMR showed increase in case of 24 hours, 72 hours incubation, but showed decrease in case of 48 hours incubation. AR showed increase in all. In $50{\mu}g/m{\ell}$ SNH showed increase in comparison with control group. And in $500{\mu}g/m{\ell}$, $5000{\mu}g/m{\ell}$ SNH showed increase in case of 24 hours, 48 hours incubation, but showed decrease in case of 72 hours incubation. 6. I examined proliferation of spleen cells. As these results AMR and SNH showed the highest increase in $50{\mu}g/m{\ell}$, but showed the lowest increase in $5000{\mu}g/m{\ell}$. AR showed the highest increase in $500{\mu}g/m{\ell}$, but this result was the almost same in $50{\mu}g/m{\ell}$, $5000{\mu}g/m{\ell}$. And AMR, AR, SNH showed higher activity in Lipopolysaccharide than Concanavalin A. 7. In all groups results of PCA were decreased in 2 week. In 4 week AR and SNH showed decrease, but AMR didn't show change. In 6 week AR and SNH showed decrease, but on the contrary AMR showed increase. 8. In experimentation on histamine contents, AMR showed significant increase at first agent contact. And AR, SNH showed decrease at first agent contact, but these results were of no importance. At second agent contact AMR showed decrease, but was of no importance. AR, SNH showed significant decrease. At third agent contact, AMR showed significant increase. AR, SNH showed decrease, but these results were of no importance. From above these results, AR and SNH showed good effects on immunoreaction. And all the herb medicines in this examination showed good effects in promotion on spleen cells transformation and proliferation of spleen cells, especially activated B-cells. AR, SNH showed good effects on anti-allergic reaction, but AMR was almost inefficient. Accordingly I think that AR shall be used in disease bringing about a lowering of immunity, that is, AR shall be used in strengthening the body resistance. And I think that SNH shall be used in eliminating pathogenic factors with strengthening the body resistance. It is necessary to a deep study in future.

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