• Journal of Biosystems Engineering
• /
• 제16권1호
• /
• pp.49-59
• /
• 1991

A numerical model was developed to predict grain temperature, moisture content, and drymatter loss of rough rice in a grain storage bin. This model simulated conduction, natural convection, and mass transfer occuring inside a storage bin. The results obtained from the study were as follows. 1. The predicticted results agreed well with the measured results. 2. Rough rice could be store safely for one year in Suweon, Dajeon, and Jingu area. 3. Aeration of 5-day was required to control grain temperature and moisture content rise early in Jun and July, respectively.

• 대한임베디드공학회논문지
• /
• 제7권1호
• /
• pp.1-7
• /
• 2012

A Smartphone has an ability accessing Internet by URL stored in NFC(Near Field Communication) Tag for storing the information of items, blogs and web pages. Because the system works through the Internet with URL, however, it needs to pay some costs like communication fee and time. If we can store the web page on the tags, we can save the communication overhead. But they have too small memory to store it. In this paper, we introduce the Micro-Webpage technology which can be stored in NFC tag or QR(Quick Response) code. To make a Micro-Webpage, we remove control tags from the web page to leave a user original content. The removed control tags are stored in our smartphone application as a template. The user content is also compressed to a smaller one by an lossless compression algorithm. When a tag is read, the stored content is decompressed and, it is combined with the template to make the original web page. We have implemented a prototype of Micro-Webpage system on Android platform and confirmed that the prototype has reasonable performance improvements in saving memory and loading web page time.

• International Journal of Internet, Broadcasting and Communication
• /
• 제14권4호
• /
• pp.121-131
• /
• 2022

We look at the initial stage of Meta (previous Facebook)'s new metaverse platform and investigate its platform design in pre-launch and ignition life stage. From the Rocket Model (RM)'s theoretical logic, the results reveal that Meta firstly focuses on investing in key content developers by acquiring virtual reality (VR), video, music content firms and offering production support platform of the augmented reality (AR) content, 'Spark AR' last three years (2019~2021) for attracting high-potential developers and users. In terms of three matching criteria, Meta develops an Artificial Intelligence (AI) powered translation software, partners with Microsoft (MS) for cloud computing and AI, and develops an AI platform for realistic avatar, MyoSuite. In 'connect' function, Meta curates the game concept submitted by game developers, welcomes other game and SNS based metaverse apps, and expands Horizon Worlds (HW) on VR devices to PCs and mobile devices. In 'transact' function, Meta offers 'HW Creator Funding' program for metaverse, launches the first commercialized Meta Avatar Store on Meta's conventional SNS and Messaging apps by inviting all fashion creators to design and sell clothing in this store. Mata also launches an initial test of non-fungible token (NFT) display on Instagram and expands it to Facebook in the US. Lastly, regarding optimization, especially in the face of recent data privacy issues that have adversely affected corporate key performance indicators (KPIs), Meta assures not to collect any new data and to make its privacy policy easier to understand and update its terms of service more user friendly.

• 마케팅과학연구
• /
• 제7권
• /
• pp.209-238
• /
• 2001

최근까지 대형소매점 구매담당자들의 직무내용에 대한 외국논문들은 계속 연구되어 오고 있지만 국내에서는 이들 구매담당자의 직무내용 분석을 다룬 연구는 거의 없었다. 따라서 본 연구에서는 소때점 구매담당자의 직무내용분석기법 중에서 PAQ차원을 중심으로 대형소매점인 백화점과 할인접 구매담당자의 직무내용을 분석하고. PAQ차원별 변수 중 에서 어떠한 변수가 업무성과와 점포성과에 가장 큰 영향을 미치는지를 실증분석하였다. 이를 위해 소매점 구매담당자의 역할과 PAQ차원의 직무내용, 업무성과, 점포성과의 선행 연구를 토대로 연구모형과 가설을 설정하였고 설문지의 측정문항을 바탕으로 백화점과 할 인점 구매담당자을 대상으로 설문조사를 실시하고 그 결과를 실증 분석하였다.

• 한국의류학회지
• /
• 제46권3호
• /
• pp.545-563
• /
• 2022

Metaverse is a digitally generated world beyond the physical realm; many fashion brands are launching virtual stores in Metaverse. This study explores the cases of flagship stores of fashion brands in Metaverse to understand the peculiarity of Metaverse retailing. This study selected four flagship stores of fashion brands launched on ZEPETO, the largest Metaverse platform in Korea. The characteristics of Metaverse retailing used for case analysis were store (store credibility, servicescape, ease of use), product (content, demos, incentives), social factor (store personnel, store customers), and entertainment (events, games, free gifts). The results illustrate that a transaction system linked to reality could not be established due to technical limitations; it was difficult to obtain specific product information, such as the color, size, and fabric. However, all four fashion brands overwhelmed the traditional retail channels in terms of providing various spatial experiences by operating their virtual stores in global cities related to the heritage and identity of each brand. Furthermore, fashion brands can convey a sense of deviation and fantasy to consumers by delivering unique entertainment activities in Metaverse that they cannot easily provide in real life.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제12권10호
• /
• pp.4856-4872
• /
• 2018

The mobile internet has grown ubiquitous across the globe with the widespread use of smart devices. However, the designs of modern mobile operating systems and their applications limit content retrieval with mobile applications. The mobile internet is not as accessible as the traditional web, having more man-made restrictions and lacking a unified approach for crawling and content retrieval. In this study, we propose an automatic and scalable mobile application content crawler, which can recognize the interaction paths of mobile applications, representing them as interaction graphs and automatically collecting content according to the graphs in a parallel manner. The crawler was verified by retrieving content from 50 non-game applications from the Google Play Store using the Android platform. The experiment showed the efficiency and scalability potential of our crawler for large-scale mobile internet content retrieval.

• 디지털산업정보학회논문지
• /
• 제9권4호
• /
• pp.119-125
• /
• 2013

The amount of digital content grows exponentially by the development of the internet and the change of computing environments and the target also is getting wider. The industry using this digital content has been growing greatly. However, the distribution of pirated digital content is increasing using internet because digital content is easy to store and transmit and the damage is growing. In this paper, we propose safety trading system which can conceal the author's information safely in digital content in order to block illegal distribution of digital content. ARIA encryption algorithm is used to protect the concealed information of author in digital content and it is a help to track the illegal traders by doing fingerprinting of buyer information to digital content and managing the transaction information. The technical support for copyright dispute is to allow by providing the capability to verify illegal edit to original digital contents.

• 한국군사과학기술학회지
• /
• 제19권6호
• /
• pp.721-729
• /
• 2016

CCN(Content-Centric Network) enables users to retrieve content using the content's name. Researchers face critical challenges in terms of mobility. Since the routing information is part of the content name, when the provider moves, it is necessary to update all the routers routing information. However, this requires significant costs. In this paper, we propose PNPCCN(Proactive Neighbor Pushing CCN), considering the popularity and rarity of mobility support, for providers in CCN environments. Via simulation studies, we demonstrate that our solutions are effective in terms of shorter numbers of retransmitted Interest packets, and average download times and higher delivery ratios during mobility.

• 한국멀티미디어학회논문지
• /
• 제19권8호
• /
• pp.1597-1608
• /
• 2016

Recently, a number of solutions were proposed to address the challenges and issues of vehicular networks. Vehicular Cloud Computing (VCC) is one of the solutions. The vehicular cloud computing is a new hybrid technology that has a remarkable impact on traffic management and road safety by instantly using vehicular resources. In this paper, we study an important vehicular cloud service, content-based delivery, that allows future vehicular cloud applications to store, share and search data totally within the cloud. We design a VCC-based system architecture for efficient sharing of vehicular contents, and propose a Hierarchical Hybrid Content Delivery scheme using Bloom Filter (H2CDBF) for efficient vehicular content delivery in Vehicular Ad-hoc Networks (VANETs). The performance of the proposed H2CDBF is evaluated through an analytical model, and is compared to the proactive content discovery scheme, Bloom-Filter Routing (BFR).

• 한국환경농학회지
• /
• 제29권4호
• /
• pp.348-353
• /
• 2010

본 연구에서는 돈분 슬러리의 저장형태 및 온도에 따른 유기물의 거동을 관찰하였는데, closed system과 open system의 저장형태에 따른 유기물 농도는 $20^{\circ}C$에서 30일 저장 후 약 2배 정도의 차이를 보였다. 또한 온도에 의한 유기물 농도의 거동은 온도가 증가할수록 TS 및 VS 농도가 감소하였고, $20^{\circ}C$ 약 23%, $35^{\circ}C$ 약 29% 정도가 감소되는 것으로 나타났다. 하절기 외부온도 특성을 반영한 온도조건(20, $35^{\circ}C$) 및 저장기간 따른 생성된 유기산 종류는 비슷하였고, 저장기간 15일 이후부터 분변내 포함된 가수분해 및 산생성 미생물의 성장이 증대되어 유기산의 생성이 증가하였다. 반응시간 30일 후 생성된 총유기산 농도는 $20^{\circ}C$에서 $2,829\;mg{\cdot}COD/L$이었으며, $30^{\circ}C$에서는 $9,123\;mg{\cdot}COD/L^{\circ}C$로 초기 유기물농도 대비 각각 5.4, 17.4%의 유기산 전환율을 나타내었다. 따라서 돈분슬러리의 저장기간이 길어질수록 외부온도에 따라 가수분해 및 산생성 반응으로 유기산이 생성되고, 메탄생성균의 기질이용으로 유기물의 손실이 발생하여 온실가스 배출도 증가할 것으로 예상된다.