• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 한국방송∙미디어공학회 2017년도 하계학술대회
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• pp.184-185
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• 2017

최근 기술의 발전으로 자연스러운 미디어와 실재감을 제공하는 차세대 3D 기술이 많은 관심을 받고 있다. MMT는 MPEG에서 표준화를 진행하고 있는 차세대 미디어 전송 규격으로 방송망(Broadcast Network)과 인터넷을 동시에 서비스할 수 있는 하이브리드 방송에 적합한 기능을 제공한다. 본 논문에서는 8K(7,680 x 4,320)의 해상도를 가지는 영상을 다채널(4개의 채널) 영상으로 분리하고, 각각의 분리된 영상을 MPEG MMT 프로토콜을 이용해서 서버에서 4개의 채널로 전송, 4개의 클라이언트에서 미디어를 수신하고, 동기화 알고리즘을 이용하여 동기를 맞춘 후 최소의 지연시간 이내에 4채널의 미디어를 재현할 수 있는 기술을 설계하고 구현하였다.

• Microbiology and Biotechnology Letters
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• 제17권5호
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• pp.524-528
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• 1989

A $\beta$-Galactosidase producing strain, Alkalophilic Bacillus sp, YS-309, has been isolated from soil sample. The strain was capable of producing large amount of intracellular $\beta$-galactosidase in the alkaline media rather than in the neutral media. The preferable medium composition has been determined to be as follows: 0.5% lactose, 0.5% yeast extract, 0.5% soybean meal, 0.1% KH$_2$PO$_4$, 0.02% MgSO$_4$7$H_2O$ 0,0.6% Na$_2$CO$_3$ (pH 9.9). The enzyme was produced by lactose or IPTG as in-ducer. But both Enzyme synthesis and cellular growth were decreased when lactose was added at the higher concentrations than 1.5% (v/v).

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 한국방송공학회 2014년도 추계학술대회
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• pp.107-110
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• 2014

방통융합시대가 도래함에 따라 방송망뿐만 아니라 IP망을 통해 콘텐츠를 소비할 수 있는 스마트TV의 보급이 급속히 확산되고 있다. 또한 영상과 음악 및 광고와 같은 멀티미디어 콘텐츠의 소비 환경이 한 화면에 한 가지의 미디어 서비스만 제공받는 환경에서 다양한 정보를 동시에 소비할 수 있는 환경으로 확대되면서 다양한 정보를 하나의 화면에서 혼용적으로 전달하기 위한 장면구성정보가 필요하게 되었다. 장면구성정보는 미디어가 소비되는 특정 시간과 해당 공간의 정보를 기술하므로써 다수의 미디어를 복합적으로 소비하는 방법으로, IP 기반에서도 여러 개의 화면을 통해 여러 소스의 콘텐츠를 소비하여 다양한 사용자 경험(User Experience)를 제공하고자 ISO/IEC JTC1/SC29/WG11(별칭 MPEG)에서는 방송서비스에서 방송망 및 IP망을 활용하여 멀티미디어 데이터를 전송할 때 사용하는 MPEG Media Transport(MMT)를 기반으로 장면구성정보를 제공하기 위한 MMT-Composition Information(MMT-CI)를 기술표준화하였다. 본 논문에서는 MMT-CI의 표준문서에 따라 W3C의 웹언어인 HTML5와 확장성 언어인 XML을 이용하여 멀티소스를 활용한 장면구성정보를 기술하는 것을 제안하고 장면구성서비스에 적용을 위한 플레이어를 구현 및 검증한다.

• Proceedings of the Materials Research Society of Korea Conference
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• 한국재료학회 2011년도 춘계학술발표대회
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• pp.244.2-244.2
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• 2011

We introduce a novel and robust method for the preparation of nanocomposite multilayers, which allows the excellent photoluminescent (PL) properties as well as the accurate control over the composition and dimensions of multilayers. By exchanging the oleic acid stabilizers of CdSe@ZnS quantum dots (QDs) synthesized in organic solvent with 2-bromo-2-methylpropionic acid (BMPA) in the same solvent, these nanoparticles were be alternately deposited by nucleophilic substitution reaction with highly branched poly(amidoamine) dendrimer (PAMA) through layer-by-layer (LbL) assembly process. Our approach does not need to be transformed into the water-dispersible nanoparticles with electrostatic or hydrogen-bonding groups, which can deteriorate their inherent properties, for the built-up of multilayers. The nanocomposite multilayers including QDs exhibited the strong PL properties achieving densely packed surface coverage as well as long-term PL stability under atmospheric conditions in comparison with those of conventional LbL multilayers based on electrostatic interaction. Furthermore, we demonstrate that the flexible multilayer films with optical properties can be easily prepared using nucleophilic substitution reaction between bromo and amino groups in organic media. This robust and tailored method opens a new route for the design of functional film devices based on nanocomposite multilayers.

• International journal of advanced smart convergence
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• 제5권2호
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• pp.18-23
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• 2016

Cell walls of microalgae consist of a polysaccharide and glycoprotein matrix providing the cells with a formidable defense against its environment. Anaerobic digestion (AD) of microalgae is primarily inhibited by the chemical composition of their cell walls containing biopolymers able to resist bacterial degradation. Adoption of pre-treatments such as thermal, thermal hydrolysis, ultrasound and enzymatic hydrolysis have the potential to remove these inhibitory compounds and enhance biogas yields by degrading the cell wall, and releasing the intracellular algogenic organic matter (AOM). This paper preproposal stage investigated the effect of different pre-treatments on microalgae cell wall, and their impact on the quantity of soluble biomass released in the media and thus on the digestion process yields. This Paper present optimum approach to degradation of the cell wall by ultra-sonication with practical design specification parameter for ultrasound based pretreatment system. As a result of this paper presents, a microalgae system in a wastewater treatment flowsheet for residual nutrient uptake can be justified by processing the waste biomass for energy recovery. As a conclusion on this result, Low energy harvesting technologies and pre-treatment of the algal biomass are required to improve the overall energy balance of this integrated system.

• Microbiology and Biotechnology Letters
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• 제32권4호
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• pp.366-370
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• 2004

Four chitinase producing bacteria, Arthrobacter nicotinae CH4, Arthrobacter nicotinae CHI3, Arthrobacter sp. CH5 and Micrococcus sp. CH3, were isolated from small crabs and shrimps. We investigated the optimum medium condition for the production of enzyme and high cell mass. The preferable medium composition was as follows: colchitin 0.1 %(w/v), glycerol 0.25%(w/v) and yeast extract 0.05%(w/v) in minimal midium ($K_{2}HPO_{4}$ 0.7 g/l, $KH_{2}PO_{4}$ 0.3 g/l, $MgSO_{4}{\cdot}5H_{2}O$ 0.5 g/l, $FeSO_{4}}{\cdot}7H_{2}O$ 0.01 g/l, $ZnSO_{4}$ 0.001 g/l, $MnCI_2$ 0.001 g/l, pH 7.0). This cell culture medium could be used directly as sample for measuring chitinase activity. Because it hardly conreducing sugar such as glucose (blank value=0), the detected reducing sugar can be considered as a chitinase reaction product. The results can be used for easy preparation method for determination of enzyme activity and analysis of enzyme-substrate reaction in step of screening of chitinase producing bacteria.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• 제44권3호
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• pp.41-48
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• 2012

Materials used for the inks in the printing industry is an important material following the paper. The composition of the ink is pigment and organic solvents. However, Ink is used in a variety of chemicals, they are classified as non-green. Therefore, rosin-modified phenolics manufactured by the reaction of phenol and formaldehyde can take the place of eco-phenol free resin and by experiment density, gloss, trapping, contrast and dot gain of printing has been studied as printability. The result of study can support that the properties of printing using eco-phenol free resin such as density, gloss, contrast and trapping is similar to existing ink. In the part of dot gain, the result is excellent. So we were thought to be able to improve some characteristics such as dispersion of black ink, that will be possible for the field applicability.

• 정보저장시스템학회:학술대회논문집
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• 정보저장시스템학회 2005년도 추계학술대회 논문집
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• pp.124-127
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• 2005

Rewritable optical memory devices such as an CD-RW and DVD+RW are data storage media, which take advantage of the different optical properties in the amorphous and crystalline states of phase change materials. The switching property, structural transformation, transformation kinetics and chemical bindings of $Ge_xSb_{100-x}$($6{\le}x{\le}$34) were studied to investigate the feasibility of applying $Ge_xSb_{100-x}$ alloys in optical memory. The $Ge_xSb_{100-x}$ thin film was deposited by RF magnetron co-sputtering system and phase change characteristics were investigated by X-ray diffraction (XRD), static tester, inductively coupled plasma atomic emission spectrometer (ICP-AES) and atomic force microscopy (AEM). Optimum fiim composition of $Ge_xSb_{100-x}$ was studied and its minimum time fur laser induced crystallization and optical contrast fur phase transition was performed. These results might be correlated with the binding energies between Ge and Sb, and indicate that $Ge_xSb_{100-x}$ have an potential far optical memory applications.

• Journal of Microbiology and Biotechnology
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• 제20권5호
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• pp.950-957
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• 2010

Serratiopeptidase (SRP), a 50 kDa metalloprotease produced from Serratia marcescens species, is a drug with potent anti-inflammatory property. In this study, a powerful statistical design, evolutionary operation (EVOP), was applied to optimize the media composition for SRP production in shake-flask culture of Serratia marcescens NRRL B-23112. Initially, factors such as inoculum size, initial pH, carbon source, and organic nitrogen source were optimized using one factor at a time. The most significant medium components affecting the production of SRP were identified as maltose, soybean meal, and $K_2HPO_4$. The SRP so produced was not found to be dependent on whey protein, but rather was notably induced by most of the organic nitrogen sources used in the study and free from other concomitant protease contaminant, as revealed by protease inhibition study. In addition, experiments were performed using different sets of EVOP design with each factor varied at three levels. The experimental data were analyzed with a standard set of statistical formula. The EVOP-optimized medium, with maltose 4.5%, soybean meal 6.5%, $K_2HPO_4$ 0.8%, and NaCl 0.5% (w/v), gave a SRP production of 7,333 EU/ml, which was 17-fold higher than the unoptimized media. The application of EVOP resulted in significant enhancement of SRP production.

• Smart Media Journal
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• 제5권3호
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• pp.49-53
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• 2016

Related researches are progressing that method of non-contact method using the electromagnetic field on the human body by detecting the motion recognition signal is the limitations of time and space, so less than the existing systems. In this paper, we designed the circuit system that can implement the hardware that can detect the electric field signal of the human body non-contact method to increase the recognition rate to screen this digital waveform. The PCB design Used to automatically increase of composition of the circuit and the linkage of the comparator digital waveform with circuit simulation of the system. At same time for evaluate the characteristics of the whole circuit system.