• Journal of the Korean Graphic Arts Communication Society
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• v.29 no.1
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• pp.23-33
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• 2011

This experimental focus to characterize luminescence properties related to CNT (Carbon Nano Tube) element dispersedly implanted in ZnS-based phosphor thin film panel fabricated by a screen printing method. More specifically FE-SEM measurements, L-V(Luminescence vs. Voltage) and photo luminescence were carried out to determine an optimum value of CNT concentration and film thickness for the thin film structure of CNT-ZnS:(Cu, Al) by the screen printing method. We confirmed that an optimum value of CNT concentration in the ZnS:(Cu, Al) film panel is about 0.75 wt% resulting that the electric conductivity is 1.6 times higher than that of pure CNT sample and showing that the luminescence intensity is increasing until the optimum concentration. Clearly, CNT is presenting in the luminescence process providing a pathway for the creation of hot electron and a channel for the electron-hole recombination but overly inserted CNT may hinder to produce the hot electron for making an avalanching process. In case of the overly doped CNT 1.0 wt% in the ZnS-based phosphor, the luminescence intensity is decreasing although the electric conductivity is exponentially increasing. Based on these results, we realized that hot electron occurred by the external electric field or exciton arose by the external photon source are reduced dramatically over the critical value of CNT concentration because CNT element provide various isolated residues in the composites of ZnS based phosphor rather than pathway or channel for the D-A(Donnor to Acceptor) pair transition or the radiative recombination of electron-hole.

• The Journal of the Convergence on Culture Technology
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• v.9 no.4
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• pp.431-436
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• 2023

The film Aftersun(2022) is Scottish director Charlotte Wells' feature debut and is one of the films that received the most attention in the international art film scene that year. The overall structure of the film is a look back at a certain summer vacation that Sophie, now an adult, went to Turkey with Calum, a 30-year-old 'young dad', whom she lived apart after divorcing her mother when she was 11 years old. In fact, it can be said to be a reconstruction of memory, and Aftersun not only describes the contents remembered, but also reveals the process of reconstructing memories, making the film a process of post-action memory work. In this process, Aftersun proves Lev Manovich's words that cinema is an indexic art. Going back and forth between home video and cinematic diegesis, After Sun unleashes a new imaginary temporality through a two-hour conversation, traces of indexical signs engraved on home video and present times. The film urges involuntary memories in the chaotic time to the present, and makes meaning through traces and signs of intense gestures in the dialogue between media and media, past and present. The We think about the meaning through the time when the story is stopped and the implications of the gestures.

• Cartoon and Animation Studies
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• s.15
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• pp.49-71
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• 2009

This study analyzes Kureougy Balmyungwang (Prankster Invention King), produced by Chung-ki Kim in 1984. [Prankster Invention King (Kureougy Balmyungwang)] has been known as science education film. However, around the time this film was produced in 1980s in South Korea, Science and Technology is basis for development of nation driven by military dictatorship for increasing national welfare and individual capability. In this regards, Kureougy Balmyungwang (Prankster Invention King) is an animated movie not only about education and science, but also a propaganda describing children making every effort to develop their country by scientific research. In this regards, this film is in accordance with Director Kim's other animated films such as General Toli, who also served for the government, advertising its policy. This article compares and analyzes Kureougy Balmyungwang (Prankster Invention King) with various propaganda works after World War I, to clarify the propaganda characteristic and contemplate the contemporary meaning of this work.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.24 no.5
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• pp.422-426
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• 2011

Piezoelectric materials can be used to convert mechanical energy into electrical energy. In this study, we investigated the possibility of harvesting from mechanical vibration force using a high efficient piezoelectric material-polyvinylidene fluoride (PVDF). A piezoelectric energy harvesting system consists of rectifier, filter capacitor, resistance. The experiments were carried out with impacting force to PVDF film with the thickness of 1 ${\mu}m$. The output power was measured with change in the load resistance value from 100 ${\Omega}$ to 2.2 $M{\Omega}$. The highest power was obtained under optimization by selection of suitable resistive load and capacitance. A power of 0.3082 ${\mu}W/mm^2$ was generated at the external vibration force of 5 N (10 Hz) across a 1 $M{\Omega}$ optimal resistor. Also, the maximum power of 0.345 ${\mu}W/mm^2$ was generated at 22 ${\mu}F$ and 1 $M{\Omega}$. The developed system was expected at a solution to overcome the critical problem of making up small size energy harvester.

• Journal of Biosystems Engineering
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• v.27 no.3
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• pp.195-202
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• 2002

In order to make a winter cereal wrap silage, a tractor attached round bale wrapper was developed locally. Its specific structure and various functions were reported in the last submitted paper. In this study a control system of bale wrapper combining with the actuators of various processes was developed to make round bale wrapper compatible in the field. Also. its performance was tested by making the rye round bale. The results can be summarized as fellow. 1. The field capacity of round bale wrapping was investigated around 0.5 ha/hr, and the operating time of bale wrapper was about 3 min for each 500kg round bale 2. Plastic film which has maximum elongation rate of 796% was stretched to 150∼170% of original length and was lessened to 80∼90% of original width. 3. In the quality test of bale produced by developed bale wrapper, there was no significant changes of moisture contents if it was wrapped more than 4 layers of 25 ㎛-plastic film. 4. Also. temperature of the wrapped bale was about 33$\^{C}$ in the beginning of fermentation and was stabled to 26∼29$\^{C}$ during one month or more storage. Therefore, wrapping performance of the developed bale wrapper was properly.

• Proceedings of the Korea Contents Association Conference
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• 2004.11a
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• pp.121-124
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• 2004

The Contemporary animation style based on technology become various within some categories and genres as recreating the importance and meaning of many formalities. According to the variation of the contemporary animation style, The computer animation that has affected on continuous development of science and its following broad-band culture takes charge of the important position in producing the contemporary visual art. On this thesis, I will research < Ani-matrix > which has 9 episode each for the different Matrix world focused on its animation style. I will analyze their forms of expression into the both aspects of esthetics viewpoint technologically and film making style traditionally regarding to the matter of reality and reemergence on a viewpoint of a realistically esthetics. Also I will analyze mutual connection among the reinterpretation for the reality, philosophical message, and animation style within < Ani-Matrix> suggested by influence of Post-modernism. Thus, I intend to prospect the formation of animation style followed by its esthetics construction and effect on computer animation of the film genre.

• Journal of IKEEE
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• v.20 no.4
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• pp.392-397
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• 2016

In this paper, Characteristics of the ITO thin film deposited were analyzed using DC magnetron sputtering in order to investigate the deposition conditions of ITO thin film for transparent electrode. The experiment conditions were atmospheric pressure from 1 to 3[mTorr] with 1 [mTorr] step, bias electric voltage ranged from 260[V] to 330[V] with 10[V] step. The transmittance, refractive index and surface and cross-sectional shape of the deposited thin film were measured with an UV.-VIS. spectrophotometer, ellipsometer and SEM. Such condition as 1~2[mTorr] and near 300[V] voltage the transmittance was over 90[%] and the refractive index more than 2. Therefore, it was confirmed that the appropriate condition for making a highly transparent conductive electrode.

• The Journal of the Korea Contents Association
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• v.12 no.5
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• pp.81-90
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• 2012

Since the Canon EOS 5D Mark II with which the Full HD video shooting is possible was launched in 2008, the utilization of the DSLR cameras has been increasing in the video production field. In this thesis, the shortages and advantages of the video functions that the 5D Mark II cameras have will be analysed and they will be compared with the RED cameras that are most widely used in the video production field today. Through this, the utilization of the DSLR camera in the film production field will be investigated. The DSLR camera has the advantage of having good clear picture since it uses the image sensor of big size, and of being able to utilize the various lenses of good quality, and is small in size and light in weight compared to the conventional HD cameras. Although, there are some limitations that there are parts to be improved such as the sound recording problems and development of various additional equipments, the excellent usage that the DLSR cameras have is presenting a new possibility for the film production.

• Membrane Journal
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• v.30 no.5
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• pp.293-306
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• 2020

Increasing harmful effects of climate change, such as its effect on water scarcity, has led to a focus on developing effective water purification methods to obtain pure water. Additionally, rising levels of water pollution is increasing levels of environmental degradation, calling for sources of water treatment to remove contaminants. To purify water, osmotic processes across a semipermeable membrane can take place, and recent studies are showing that incorporating nanoparticles, including carbon quantum dots (CQDs), graphene carbon dots (GQDs), and graphene oxide quantum dots (GOQDs) are making thin film composite (TFC) membranes more effective by increasing water flux while maintaining similar levels of salt rejection, increasing the hydrophilicity of the membrane surface, showing bactericidal properties, exhibiting antifouling properties to prevent accumulation of bacteria or other microorganisms from reducing the effectiveness of the membrane, and more. In the review, the synthesis process, applications, functionality, properties, and the role of several types of quantum dots are discussed in the composite membrane for water purification.

• The Journal of the Korea Contents Association
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• v.19 no.11
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• pp.168-177
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• 2019

In cinema, a montage can be defined as temporalization. In reverse, it is evident that this method results in the spatialization of time. In movies, you are free to go to the past or future, see separated times together, and separate the same time into different ones. Therefore, in one aspect, time is turned into space, and on the other hand, space is turned into time. In conclusion, space in cinema inevitably expresses time. The movie the creative arrangement of time and space played a big role in making a movie that simply overlaps a story from high school to the present attract over seven million audiences. Director Kang Hyung-cheol used his unique film production language to transform boring into cheerfulness and stale to delight, and he helped the audience heal their wounds from their youth. He said, "The most important aspect of movie production is creating visual stories, and the background of such visual story is time and space." This paper aims at analyzing the creative time and space production of the director in the film .