• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제12권5호
• /
• pp.2103-2123
• /
• 2018

Ships built today are larger in scale and feature more complex structures. The ever-evolving systems used on board a ship require vast amounts of data processing. In the future, with the advent of smart ships, unmanned ships and other next-generation ships, the volumes of data to be processed will continue to increase. Yet, to date, ship data has been processed using wired networks. Placed at fixed locations, the nodes on wired networks often fail to process data from mobile devices. Despite many attempts made to use Wi-Fi on ships just as on land to create wireless networks, Wi-Fi has hardly been available due to the complex metal structures of ships. Therefore, Wi-Fi on ships has been patchy as the ship-wide total Wi-Fi coverage has not properly implemented. A new ship-wide wireless network environment is part of the technology conducive to the shipbuilding industry. The wireless network environment should not only serve the purpose of communication but also be able to manage and control multiple features in real-time: fault diagnostics, tracking, accident prevention and safety management. To better understand the characteristics of wireless frequencies for ships, this paper tests the widely used TETRA, UHF and Wi-Fi and sheds light on the features, advantages and disadvantages of each technology in ship settings. The proposed deployment of a Super Wi-Fi network leveraging the legacy UHF system of TMS generates a ship-wide wireless network environment. The experimental findings corroborate the feasibility of the proposed ship-wide Super Wi-Fi network environment.

• 한국수자원학회:학술대회논문집
• /
• 한국수자원학회 2017년도 학술발표회
• /
• pp.191-191
• /
• 2017

Floods have become more widespread and frequent among natural disasters and consisted significant losses of lives and properties worldwide. Flood's impacts are threatening socio-economic and people's lives in the Mekong River Basin every year. The objective of this study is to identify the flood hazard areas and inundation depth in the Mekong River Basin. A rainfall-runoff and flood inundation model is necessary to enhance understanding of characteristic of flooding. Rainfall-Runoff-Inundation (RRI) model, a two-dimensional model capable of simulating rainfall-runoff and flood inundation simultaneously, was applied in this study. HydoSHEDS Topographical data, APPRODITE precipitation, MODIS land use, and river cross section were used as input data for the simulation. The Shuffled Complex Evolution (SCE-UA) global optimization method was integrated with RRI model to calibrate the sensitive parameters. In the present study, we selected flood event in 2000 which was considered as 50-year return period flood in term of discharge volume of 500 km3. The simulated results were compared with observed discharge at the stations along the mainstream and inundation map produced by Dartmouth Flood Observatory and Landsat 7. The results indicated good agreement between observed and simulated discharge with NSE = 0.86 at Stung Treng Station. The model predicted inundation extent with success rate SR = 67.50% and modified success rate MSR = 74.53%. In conclusion, the RRI model was successfully used to simulate rainfall runoff and inundation processes in the large scale Mekong River Basin with a good performance. It is recommended to improve the quality of the input data in order to increase the accuracy of the simulation result.

• ALGAE
• /
• 제36권4호
• /
• pp.315-326
• /
• 2021

Ion channels are membrane protein complexes mediating passive ion flux across the cell membranes. Every organism has a certain set of ion channels that define its physiology. Dinoflagellates are ecologically important microorganisms characterized by effective physiological adaptability, which backs up their massive proliferations that often result in harmful blooms (red tides). In this study, we used a bioinformatics approach to identify homologs of known ion channels that belong to 36 ion channel families. We demonstrated that the versatility of the dinoflagellate physiology is underpinned by a high diversity of ion channels including homologs of animal and plant proteins, as well as channels unique to protists. The analysis of 27 transcriptomes allowed reconstructing a consensus ion channel repertoire (channelome) of dinoflagellates including the members of 31 ion channel families: inwardly-rectifying potassium channels, two-pore domain potassium channels, voltage-gated potassium channels (K_v), tandem K_v, cyclic nucleotide-binding domain-containing channels (CNBD), tandem CNBD, eukaryotic ionotropic glutamate receptors, large-conductance calcium-activated potassium channels, intermediate/small-conductance calcium-activated potassium channels, eukaryotic single-domain voltage-gated cation channels, transient receptor potential channels, two-pore domain calcium channels, four-domain voltage-gated cation channels, cation and anion Cys-loop receptors, small-conductivity mechanosensitive channels, large-conductivity mechanosensitive channels, voltage-gated proton channels, inositole-1,4,5-trisphosphate receptors, slow anion channels, aluminum-activated malate transporters and quick anion channels, mitochondrial calcium uniporters, voltage-dependent anion channels, vesicular chloride channels, ionotropic purinergic receptors, animal volage-insensitive cation channels, channelrhodopsins, bestrophins, voltage-gated chloride channels H⁺/Cl^- exchangers, plant calcium-permeable mechanosensitive channels, and trimeric intracellular cation channels. Overall, dinoflagellates represent cells able to respond to physical and chemical stimuli utilizing a wide range of G-protein coupled receptors- and Ca²⁺-dependent signaling pathways. The applied approach not only shed light on the ion channel set in dinoflagellates, but also provided the information on possible molecular mechanisms underlying vital cellular processes dependent on the ion transport.

• 비교문화연구
• /
• 제51권
• /
• pp.45-71
• /
• 2018

이 논문은 루이스 어드릭이 널리 호평 받은 소설 "사랑의 묘약"(1993)에 등장하는 두 여성인물(룰루 나나푸시와 마리 라자르 캐시포)에 초점을 맞추어, 북미 원주민이 '사라지는 사람들'이라는 오래되고 위험한 관념을 심문하고 와해시키는 저자의 정치적으로 저항적인 목소리를 탐구한다. 우선, 이 논문은 정부정책의 실행, 법, 종교, 문화 면에서 드러나는 미국 백인의 식민주의적 지배에 대항한 치페와족의 다층적 저항을 살펴보면서, 어드릭이 '사라지는 사람들'('명백한 운명'의 또 다른 표현)에 대한 의식이 근거 없음을 이야기하는 방식을 탐구한다. 둘째, 이 논문은 프로이트와 마르쿠제가 '에로스'(억압적 문명이 야기하는 위기에 대한 대안으로서 삶을 통합하고 유지하려는 에너지)에 대해 제시한 성찰을 참조하여, 룰루와 마리의 사랑의 포용력을 중심으로 치페와족의 삶과 유산이 유지되고 부활하는 것에 대한 저자의 비전을 밝힌다. 치페와 인디언보호구역에 가해지는 파괴적이고 억압적인 식민주의적 상황에도 불구하고, 룰루와 마리가 이들 자신과 더불어 부족공동체의 사랑과 유대를 강화하고 상호간의 갈등을 봉합하는 통합력은 역사의식에 기초한 어드릭의 '에로스'의 정치성을 밝혀줄 것이다.

• 비교문화연구
• /
• 제23권
• /
• pp.265-293
• /
• 2011

This study focused on the literary world of T. Tolstaya, a Russian writer who takes a crucial position in contemporary Russian literature, drawing upon the wrier's a couple of short stories. 'Youth' is a key motive encompassing all works of Tolstaya, so that it becomes the poetic keynote among her literary works. In order to examine such distinctions of the main characters' world awareness in their youth as shown in Tolstaya's literary works, Chapter 2 of this paper paid a special attention to the analyse of her representative works such as "Sitting on a Golden Terracing Stone" and "Meeting with a Bird", and expressed potential implications of youth with mimetic imagination for her. For Tolstaya, youth is perceived as a paradise but original imagination of youth gradually fades away in adult and ends up with a lost paradise. This is why Tolstaya uses poetic means based on nostalgia for youth like paradise and literary motto for recovery of imagination in youth. In this regard, this study particularly examined the retrospective prologue resisting the power of time as well as different fictional characters living in her own fantastic world. As a result, this study draws a conclusion that such longing and nostalgia for youth and lost paradise as delineated by Tolstaya through retrospective prologue and characters speak for an existential speculation that explores any profound implication of afflictions in reality of human life, rather than focusing on the painful reality of human life which consists of honest dialogues with realities like 'darkness' and 'pain.' In addition, this study, complying with Zolotonosov's ideas which deal with and define Tolstaya's literary works as a shabby and humble box invisibly containing a full wealth of precious jewels inside, sheds a new light on the writer's literary world.

• Entomological Research
• /
• 제48권5호
• /
• pp.439-447
• /
• 2018

Adult mosquito surveillance was conducted from 2013 through 2014 at four cattle sheds, a wild bird refuge, and two residential areas located in Gyeongnam Province in the Republic of Korea. Adult mosquitoes were collected in black light traps from April 1, through November 30. Mosquito surveillance was conducted to figure out population densities of vector mosquitoes, possibly invaded mosquitoes and identify various virus infections at the selected sites. A total of 107,466 females comprising 14 species and 7 genera were collected from 2013 to 2014. The most common species collected were Culex tritaeniorhynchus Giles (63.8%), Anopheles sinensis s.l. (18.9%), Aedes vexans nipponii (Theobald) (7.7%), and Culex pipiens Coquillett (5.1%). Trap indices (TIs) varied widely for species over their range, due to geographical distribution and degree of association with rural and urban communities. The most collected An. sinensiss.l. and Cx. tritaeniorhynchus appeared at a cow shed in Hapcheon (TI 347.5) and a pigsty in Daejeo-1-dong, Busan (TI 1,040.8), respectively, due in part to their situation near breeding sites such as rice paddies. The bi-weekly population densities for mosquito species were variable for each of the years, apparently as a result of variable annual weather conditions. None of the mosquito species collected tested for the flavivirus including Japanese Encephalitis Virus, West Nile Virus, Dengue Virus, and Zika Virus infections by polymerase chain reaction (PCR) assay were positive.

• 한국연극학
• /
• 제49호
• /
• pp.209-238
• /
• 2013

In recent years, a Zainichi playwright Jeong Ui Sin has been very active in the Korean theatre scene. However, the production of Yakiniku Dragon-first performed in Korea in 2008-which received numerous awards both in Japan and Korea gave him the recognition of Koreans' that was long overdue. In this paper, I will look closely into his two plays-Ineo Jeonseol (1990) and Yakiniku Dragon (2008)-which was written twenty-eight years apart from each other and reveal both similarities and differences between them in terms of the formation of post-colonial Zainichi identities. And to do so, I will utilize various opinions from post-colonial theories, performance studies theories, ethnic studies theories and theories on Zainichi Koreans. In the first, introductory chapter, I will delineate the theories on which this paper is based and some common factors of Jeong Ui Sin's 1990s plays as a point of departure. Then, I will move into the second chapter in which the two plays and actual productions of them will be closely examined to reveal different types of Zainichi identities and their social and cultural place within Japan by using Millie Creighton's concept of uchi others. In the third chapter, the identities of double negative (not not) and nomadic identities that are relevant to three types of Zainichi identity formation will be discussed. The fourth chapter will debate about various scholars' speculations about the future of Zainichi Koreans' identities and, finally, illuminate the changes/shifts that Jeong Ui Sin shows in terms of his stance as a Zainichi subject. In conclusion, even though it is very hard to speculate exactly what will happen to the Zainichi identity and their existence in Japan, the differences between the two plays-especially the endings-can be interpreted as revealing the changes in Jeong Ui Sin's Zainichi identity and it certainly sheds positive light on the future of the Zainichi identity and existence.

• 한국정보시스템학회지:정보시스템연구
• /
• 제28권1호
• /
• pp.41-72
• /
• 2019

Purpose Virtual communities (VCs) are becoming ever more important in these days, sometimes more than offline communities. Notably, they have become significant sources of knowledge sharing. Therefore, in order to foster a VC, it is very important to understand why people share their knowledge in the VC. Under this background, this paper aims at proposing the behavioral model best explains knowledge sharing activities in VCs. Design/methodology/approach We basically design our behavioral model for knowledge sharing in VCs based on theory of reasoned action (TRA). However, to understand knowledge sharing in VCs better, we specify knowledge sharing by dividing it into knowledge contribution and knowledge use. Also, instead of 'subjective norm', we adopt 'sense of virtual community (SOVC)' as a main social factor, which has been found to be important in the literature. We also include the antecedents such as 'quality of the shared knowledge', 'trust in community members', 'passion of the community leader', 'reciprocity', and 'self efficacy', which affect VC users' attitude towards knowledge sharing and SOVC. To test the hypotheses in our proposed model, we collected 253 valid surveys from the VC users. Structural equation modeling (SEM) using AMOS 23 is employed to assess the relationships proposed as the hypotheses. Findings Major findings are as follows. SOVC positively affects both intention to contribute knowledge and intention to use knowledge. And, trust in community members positively affects the attitude towards knowledge use and SOVC. The attitude towards knowledge use is also affected by the quality of the shared knowledge. Reciprocity is found to strongly positively affect the attitude towards knowledge contribution. However, passion of the community leader and self efficacy are found to have insignificant effect on SOVC and the attitude towards knowledge contribution respectively. Our study sheds a light on how to foster VCs from the perspective of knowledge management.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2016년도 추계학술대회
• /
• pp.549-551
• /
• 2016

과학기술의 발전에 따라 현대인들은 실외보다는 실내공간에 머무르는 시간이 과거에 비해 훨씬늘어 나고 있다. 최근까지도 실외 대기환경에 대해서는 매우 다양한 연구와, 개선 노력이 진행 중에 있으나 실내에서의 공기의 질 문제는 상대적으로 가볍게 여겨져 온 것이 사실이다. 실내공기의 오염은 자연적인 희석률이 큰 실외 대기환경의 오염과 달리, 희석률이 매우 낮아 한번 오염된 공기가 지속적으로 순환되면서 실내에 머무르고 있는 사람의 건강에 매우 나쁜 영향을 끼친다. 본 연구에서는 실내에서 거주하는 사람의 이동특성, 생활 형태를 반영한 능동적 실내환경 제어체계에 대한 연구를 위하여 실시간으로 측정된 공기의 질을 측정하여 사용자의 스마트기기로 정보를 전송하는 공기측정기장치 알람봇과 운영 어플리케이션을 구현 하였다.

• 한국콘텐츠학회논문지
• /
• 제19권6호
• /
• pp.481-490
• /
• 2019

본 연구의 목적은 뉴미디어의 특성을 이해하기 위해 활용되는 상호작용성 개념의 폭넓은 함의를 인지하고 그것을 구체화시키는 것이다. 이미 제안된 여러 상호작용성의 유형들을 참고하여 우연적인 상호작용성(contingent interactivity)을 고려하였다. 우연성이란 수행이나 선택이 필연적이거나 확정적인 것으로 간주할 수 없는 상태를 말하며, 또한 주체의 활동이 다양하게 이루어질 수 있는 잠재성을 말한다. 이러한 관점에서 우연적 상호작용이란 메시지나 콘텐츠를 대하는 사용자들의 관여가 필연적인 것이 아니고 실험적이거나 창의적인 경우를 말한다. 상호작용은 콘텐츠의 완성이나 특정한 현실의 몰입을 지향하지 않는다. 오히려 우연적 수행의 결과는 최종적 콘텐츠가 아니며 또 다른 사용자들의 상호작용을 유도하는 특성을 지닌다. 본 연구는 이렇게 개념화된 우연적 상호작용성의 의미를 영화 리컷과 게임 모딩의 두 가지 사례로 고찰하였다. 두 가지 경우 모두 상호작용을 행하는 주체가 우연적인 상황에 놓여있으며, 아울러 리컷이나 모딩을 통해 개별적인 콘텐츠들이 지속적으로 창출되도록 한다는 점을 이해할 수 있다.