• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.179-180
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• 2013

범죄예방이 무엇보다 중요한 형사정책의 한 축으로 자리매김 하면서 경찰활동도 다양한 변화를 추구하고 있다. 근세 이후 범죄통제경향의 변화에서도 알 수 있듯, 종국적으로는 범죄예방이 범죄통제의 최선이라는 경험을 바탕으로 경찰의 역할에 대한 새로운 시각의 등장과 더불어 나타난 것이 오늘날의 지역사회경찰활동이다. 이와 같은 경찰의 지역사회활동과 관련하여 본 연구는 미국 캘리포니아 북부에 위치한 산마테오카운티 보안관실의 C.A.R.O.N프로그램에 대하여 살펴보고자 한다.

• Archives of design research
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• v.15 no.3
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• pp.137-148
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• 2002

As human-centered design has become new paradigm in the field of design, it is also needed to apply scenario-centered design methodology in planning and design new multi-media contents. In this paper, scenario-centered design process for multimedia contnets planning ＆ design was identified through a case study of contents design of internet shopping mall "Shop 'n' Chat". The study was preceded with three kinds of scenarios during design process, which are present situation scenario to find needed contents, behavior prototype scenario to make contents concrete, and future usage scenario to design visual interface. These three stages of scenario are exampled by of finally shopping scenario between 20's girls, internet shopping scenario with using messenger, and finally navigation/interaction scenario in future internet shopping mall.

• Journal of Korea Society of Digital Industry and Information Management
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• v.8 no.4
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• pp.263-272
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• 2012

Lately, as domestic smart phone users exceeds 10 millions, Korea entered into real smart era in which smart contents market grows very quickly. One of feature for smart contents market is that there is few entry barrier for market penetration. So, it is essential for domestic digital contents providers to transform existing digital contents into smart contents to protect the entry of foreign firms into domestic market and to take advantage of opportunities to advance to foreign contents markets. The objective of this study is analyzing strategies of abroad companies which has penetrated into smart contents market successfully and classifying them systematically and the way to execute the proposed strategies. Future works of companies and governments to expand smart contents markets can be summarized as follows. First, they must prepare reliable data to elicitate proper market penetration strategies. Second, it is highly desirable to fuse contents industry and culture industry together. Third, it is urgent to formulate policies to promote SOHO contents companies.

• Journal of Digital Contents Society
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• v.9 no.1
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• pp.1-6
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• 2008

In traditional wireless communication systems the main power consumption is due to the actual transmissions power. Therefore, energy-constrained wireless networks have gained considerable research attention in recent years. Multiple-input-multiple-output (MIMO) structure, or multiple antenna communication is one of the techniques that has gain considerable importance in wireless systems and networks. In this paper, BER and throughput performance of MISO system with Go-back-N ARQ(Automatic Repeat Request) technique in wireless networks are analyzed and the energy consumption of MISO-based wireless networks is compared with conventional SISO-based wireless networks. Obtained results show the applicability of MISO system with Go-back-N ARQ technique in wireless networks with smart system design.

• Korean Journal of Poultry Science
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• v.31 no.4
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• pp.221-228
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• 2004

This study was conducted to determine the effects of two chemical additives on nitrogen (N) and soluble reactive phosphorus (SRP) contents in litter (rice hull) after broiler chicks were raised for 42 days. Two different additives were applied as a top dressing to the litter at a rate of 200 g ferrous sulfate $(FeSO_4)$ or 200 g aluminum sulfate [$Al_2(SO_4)_3$ $\cdot$ $14H_2O$, Alum] per kg litter, while the control group did not have the two chemicals added to the litter. A total of 64 broiler chicks (4 treatments$\times$4 replicates$\times$4 birds) were fed the experimental diets for 6 weeks. There was no difference in pH between the two chemical treatments and control group, but SRP content was significantly affected on it (P<0.01). SRP contents from ferrous sulfate and alum treated litter at 6 weeks were reduced by $79\%$ and $60\%$, respectively, as the two chemical treatments decreased the pH compared to the control group. In the ferrous sulfate treated litter, EC, TC, $NH_4-N$, $NO_3$-N, and IN contents did not show any difference between $FeSO_4$ treatment and control. However, the differences between $FeSO_4$ treatment and control were found in moisture, TN, ON, AN, PAN, C:N, and C:ON contents (P<0.01). As seen in the alum treated litter, there were differences in moisture, TC, TN, $NH_4-N$, IN, AN, PAN, and C:N contents between alum treatment and control (P<0.05 and 0.01) but no differences in EC, $NO_3-N$, ON, and C:ON. In conclusion, the results of this research show that ferrous sulfate and alum-treatment of poultry litter has the potential to increase N and reduce SRP content by lowering litter pH and moisture content.

• Journal of environmental and Sanitary engineering
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• v.17 no.2
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• pp.34-39
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• 2002

This study was performed to survey and evaluate the contents of di-n-butyl phthalate(DBP) in manicures by GC/FID and GC/MSD. The tested samples were 61 domestic and 41 imported manicures circulating in Seoul and Kyonggi-Do area. DBP was detected respectively in the rate of 93.4% for domestic manicures and 43.9% for imported manicures. The contents of DBP in domestic and imported manicures were 11.6g/17g~74.7g/kg and 28.2g/kg~78.9g/kg respectively. DBP was used in domestic and imported manicures with the exception of Japan products. Therefore, the alternative material for DBP should be developed and used to ensure consumers' safety.

• Journal of the Korean Ceramic Society
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• v.30 no.3
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• pp.181-188
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• 1993

The sintering and renitridation behaviors of ultrafine Si3N4 powder compacts, which were heavily oxidized and/or free-Si rich, were investigated with particular attentiion to microstructures. The specimens were heated without restoring to additives and pressure by controlling heating process attained a Xe image apparatus. The effect of particle size, free-Si contents, decomposition and renitridation, were investigated. When fired to 1$650^{\circ}C$ within 15 sec and then immediately held at 135$0^{\circ}C$ for 10min N2 atmosphere, significant densification took place in the limited region, in addition to decreasing oxygen contents to less than 0.3wt%. On the other hand, specimens decomposed due to overheating at the initial stage were rapidly renitridated at the relatively lower temperature of the holding stage. And, then, the activation energy for the renitridation was calculated to be 49kcal/mole.

• International Journal of Contents
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• v.1 no.1
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• pp.50-58
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• 2005

Generally, multidimensional data such as image and spatial data require large amount of storage space. There is a limit to store and manage those large amounts of data in single workstation. If we manage the data on parallel computing environment which is being actively researched these days, we can get highly improved performance. In this paper, we propose a parallel multidimensional index structure that exploits the parallelism of the parallel computing environment. The proposed index structure is nP(processor)-nxmD(disk) architecture which is the hybrid type of nP-nD and 1P-nD. Its node structure in-creases fan-out and reduces the height of an index. Also, a range search algorithm that maximizes I/O parallelism is devised, and it is applied to k-nearest neighbor queries. Through various experiments, it is shown that the proposed method outperforms other parallel index structures.

• International Journal of Contents
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• v.8 no.1
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• pp.47-54
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• 2012

The dynamic adaptation between various service environments using the application profiles for the service continuity is a key issue of the profile-based service continuity framework (PSCF) for N-screen service using next generation networks. PSCF offers an optimized service framework for providing continuous user services, which are multimedia video streaming, educational broadcasting, game, etc., using the various devices that are not restricted by the service environment of the user. This paper specifies the functional model of PSCF, service scenario and explains the experimental results of the service continuity for N-screen service using PSCF.

• 한국정보디스플레이학회:학술대회논문집
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• 2000.01a
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• pp.133-134
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• 2000

Effect of nitrogen doping on field emission characteristics of patterned Diamond-like Carbon (DLC) films was studied. The patterned DLC films were fabricated by the method reported previously[1]. Nitrogen doping in DLC film was carried out by introducing $N_2$ gas into the vacuum chamber during deposition. Higher emission current density of $0.3{\sim}0.4$ $mA/cm^2$ was observed for the films with 6 at % N than the undoped films but the emission current density decreased with further increase of N contents. Some changes in CN bonding characteristics with increasing N contents were observed. The CN bonding characteristics which seem to affect the electron emission properties of these films were studied by Raman spectroscopy, x-ray photoemission spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR). The electrical resistivity and the optical band gap measurements showed consistence with the above analyses.