• Journal of Popular Narrative
• /
• v.24 no.4
• /
• pp.377-402
• /
• 2018

이 글의 목적은 피터 메리만과 린 피어스가 편집한 <모빌리티와 인문학(Mobilities and the Humanities)>을 중심으로 '새 모빌리티 패러다임'과 그에 기초한 영상 및 문학 텍스트의 연구 사례들을 살펴보고, 그것들이 텍스트 연구 방법으로서 갖는 의의를 검토함으로써 모빌리티 텍스트 연구 방법을 모색하는 데 있다. <모빌리티와 인문학>은 '인문학'이라는 제목과 달리 대부분 문학 및 영상 텍스트와 그 미학을 다루는 논문들로 구성되어 있다. 이 글은 이 책에 실린 논문들을 자동차 모빌리티 시스템에 집중하는 논문들과 그렇지 않은 논문들로 구분해서 다룬다. 자동차 시스템은 오늘날 모빌리티를 상징적으로 보여주는 기계로서 과거 철도가 근대 초기 보유했던 것만큼 커다란 사회적·문화적 의의를 지니고 있기 때문이다. 우선, 자동차 모빌리티에 초점을 맞추는 논문들은 주로 모빌리티 시스템과 영상·문학 텍스트의 공진화 양상을 탐구한다. 여기서는 자동차 모빌리티 시스템과 로드무비 장르의 내적 상호작용, 일종의 텍스트로서 미디어화된 자동차 모빌리티, 여행소설과 '마비된 모빌리티'의 텍스트적 재현, 개별 자동차 여행의 특이성과 '기술적 무의식' 등의 문제를 다룬다. 그 외의 논문들은 모빌리티와 예술 형식의 관계를 중심으로 형식의 모빌리티 또는 모빌리티의 재현 문제를 탐구한다. '형식의 모빌리티' 또는 '이동하는 예술 형식', 리얼리즘적 재현을 통한 이동하는 세계에서의 '느린 장소 감각'(애착감, 친근감) 형성, 문학 텍스트의 '소급적 특징'에 기초한 허구적 서사의 (재)독해와 '대안 정치'의 가능성, 생활 글쓰기(일기)에 기록된 개별 여행자의 도시 모빌리티 경험 등에 대해 논의한다. <모빌리티와 인문학>의 의의는 크게 두 가지다. 첫째, 그 동안 텍스트 연구에서 충분히 다루어지 않았던 자동차 모빌리티에 주목하게 해준다는 점이다. 둘째, 새 모빌리티 패러다임의 관점에서 텍스트의 미학에 관한 새로운 논의를 가능하게 해준다는 점이다.

• Journal of Korea Multimedia Society
• /
• v.24 no.8
• /
• pp.1138-1148
• /
• 2021

In this study, we developed a 'shared-use mobility'-mounted local particulate matter monitoring terminal technology to measure the actual particulate matter concentration around me. As a mobile terminal device in the form of an IoT sensor platform, it is designed to be separated into a control module and a sensor module to minimize interference between sensors and to consider the optimal observation position of each sensor. As a result of the field test, it was confirmed that particulate matter was locally different depending on time and space even within the same area. In addition, it was confirmed that the concentration of particulate matter in the relevant section differed by up to 100 times compared to the surrounding area due to specific sources of particulate matter such as unpaved roads. In addition, we positively reviewed the applicability of the service in the real-time metaverse environment using this result. Through technological advancement and application of multiple shared-use mobilities, we expect to be able to provide new services for practical smart city air environment monitoring, such as localized particulate matter information, air pollution event information, and identification of causes of particulate matter.

• Journal of Microbiology and Biotechnology
• /
• v.17 no.2
• /
• pp.226-233
• /
• 2007

Members of Methylobacterium, referred as pink-pigmented facultative methylotrophic bacteria, are frequently associated with terrestrial and aquatic plants, tending to form aggregates on the phyllosphere. We report here that the production of autoinducer molecules involved in the cell-to-cell signaling process, which is known as quorum sensing, is common among Methylobacterium species. Several strains of Methylobacterium were tested for their ability to produce N-acyl-homoserine lactone (AHL) signal molecules using different indicators. Most strains of Methylobacterium tested could elicit a positive response in Agrobacterium tumefaciens harboring lacZ fused to a gene that is regulated by autoinduction. The synthesis of these compounds was cell-density dependent, and the maximal activity was reached during the late exponential to stationary phases. The bacterial extracts were separated by thin-layer chromatography and bioassayed with A. tumefaciens NTI (traR, tra::lacZ749). They revealed the production of various patterns of the signal molecules, which are strain dependent. At least two signal molecules could be detected in most of the strains tested, and comparison of their relative mobilities suggested that they are homologs of N-octanoyl-$_{DL}$-homoserine lactone ($C_8-HSL$) and N-decanoyl-$_{DL}$-homoserine lactone ($C_{10}-HSL$).

• International Journal of Computer Science & Network Security
• /
• v.23 no.1
• /
• pp.153-163
• /
• 2023

This study is situated in the context of intelligent transport systems, where in-vehicle devices assist drivers to avoid accidents and therefore improve road safety. The vehicles present in a given area form an ad' hoc network of vehicles called vehicular ad' hoc network. In this type of network, the nodes are mobile vehicles and the messages exchanged are messages to warn about obstacles that may hinder the correct driving. Node mobilities make it impossible for inter-node communication to be end-to-end. Recognizing this characteristic has led to delay-tolerant vehicular networks. Embedded devices have small buffers (memory) to hold messages that a node needs to transmit when no other node is within its visibility range for transmission. The performance of a vehicular delay-tolerant network is closely tied to the successful management of the nodes' transit buffer. In this paper, we propose a message transit buffer management model for nodes in vehicular delay tolerant networks. This model consists in setting up, on the one hand, a policy of dropping messages from the buffer when the buffer is full and must receive a new message. This drop policy is based on the concept of intermediate node to destination, queues and priority class of service. It is also based on the properties of the message (size, weight, number of hops, number of replications, remaining time-to-live, etc.). On the other hand, the model defines the policy for selecting the message to be transmitted. The proposed model was evaluated with the ONE opportunistic network simulator based on a 4000m x 4000m area of downtown Bouaké in Côte d'Ivoire. The map data were imported using the Open Street Map tool. The results obtained show that our model improves the delivery ratio of security alert messages, reduces their delivery delay and network overload compared to the existing model. This improvement in communication within a network of vehicles can contribute to the improvement of road safety.

• Korean Journal of Food Science and Technology
• /
• v.20 no.5
• /
• pp.625-630
• /
• 1988

Phosphorylation of soy protein by sodium trimetaphosphate and acetylation of soy protein by acetic anhydride were performed. Then, the functional properties of modified soy proteins were compared with that of unmodified soy protein. Isolated soy protein prepared from defatted soybean flake had protein content of 92.7% as moisture-free basis. The phosphorylated soy protein showed higher solubility, foaming properties, and water holding capacity than unmodified soy protein. Acetylation of soy protein increased emulsification activity and foaming properties greatly, whereas decreased the solubility at pH 8.0. Isoelectric pHs of phosphorylated and acetylated soy protein were shifted to acidic regions(pH 3.0 and pH 4.0) from pH 5.0, which was the isoelectric pH of unmodified soy protein. Soy protein seems to be aggregated during phosphorylation and acetylation procedure, judging form Sepharose CL-4B gel filtration profiles. The modified soy proteins showed increased mobilities to anode direction in disc-gel electrophoresis.

• Korean Journal of Microbiology
• /
• v.30 no.4
• /
• pp.291-298
• /
• 1992

Srrepromycec. corlirolar produces at least 4 catalase activity bands with different electrophoretic mobilities on polyacrylamide gel which vary during development. Spores and mycelia at stationary phase produced all the activity bands(Cat1. 760 kr); Cat3-I, 170 kD: Cat3-2, 140 kD: Cat3-3. 130 kD; Cat4, 70 kD) except for Cat2 (300 kD). Mycelia at mid-logarithmic phase produced only Cat2 and Cat3-2 bands, and mycelia at late-logarithmic phase produced bands except Catl and Cat\ulcorner. Catalase-deficient mutants were screened in S. coelicalur by H201 bubbling test following NTG mutagenesis. Wc tested sevcral non-bubbling or slow-bubbling mutants for their catalase activities. The overall activities in cell extracts decreased more than 5 fold. Activity bands in native gel selectively decreased in intensity or disappeared. In all the non-bubbling mutants testcd, Cat3-2 band decreased significantly or disappeared. suggesting that Cat3-2 is the major catalase. The selective disappearance of bands in mutants suggest that each band is governed by different genes. We purified catalase activity from -:ell extracts obtained at late-logarithmic phase. Following chromatographies on Sepharose CL-4B. DEAE Sepharose CL-6B. Phcnyl Sepharose CL-4B. and hydroxylapatite columns. only the Cat3-2 activity was obtained. The native form of Cat3-2 has molecular weight of approximately 140 kD, judged by gel electrophoresis. Thc electrophoretic mobility on SDS-polyactylamide gel suggests that this enzyme contains 2 identical subunits of 67 kD.