• Journal of the Korean Geographical Society
• /
• v.50 no.1
• /
• pp.37-52
• /
• 2015

The purpose of this study is to elucidate the traits of the spatial orientation of urban residents. The analysis materials are the 110 rough maps which have been collected for the last ten years in Yeonsugu, Incheon metropolitan. The urbanites' spatial orientation are analysed from an aspect of the orientation elements and the orientation frames respectively. As a result, the urban dwellers make use of five elements - path, node, district, landmark, and language clue for their spatial orientation. Again the orientation frames of the urban people are investigated in terms of locating and directing in space. In regard to the former, they tend relatively to depend on horizontal axes based on broad streets and to prefer to position at the center on coordinate system. With reference to the latter, they show to be north-at-the-top directed tendency and to hold higher proportion of exocentric perspective than egocentric. Consequently urban residents tend to form spatial orientation with using five spatial elements, leaning horizontal axis, positioning themselves at the central part of coordinates, directing toward north-at-the-top through exocentric perspective.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.25 no.2
• /
• pp.54-60
• /
• 1989

This paper described on the tracking of an individual fish at the fishing ground of set net by use of a small ultrasonic fish tag. The apparatuses used were composed with a tag, three receivers and two time-interval counter oscilloscope. A pulsed ultrasonic transmitter tag fitted to back of a dorsal fin of a yellowtail specimen, Seriola quinqueradidta TEMMINCK et SCHLEGEL is tracked by measuring differences in the time of arrival of the acoustic pulses at an arrangement of three receivers in the freeding tank. The successive positions of the fish were calculated from the differences in the received time of the signals. A fish carying the tag was tracked in the fishing ground of set net by use of the hydrophone and Loran-C. The results of the tests showed that this method gave good positional information to track the movement of an individual fish in the fishing ground of set net.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.23 no.1
• /
• pp.11-17
• /
• 1987

This paper describes an availability of the teltmeter device made as a trial to measure the under-water noise, and the results of the test. This telemeter device adopts FM-FM system, and its main carrier wave is 146.2MHz. The trans-mission power is about 1w, and the available distance of transmission is 2.5KM. The timer built in the telemeter device controls transmission time and pause time automatically by the R-C time-constant. The former is 30-32 seconds and the latter is 10-12 seconds. The underwater noise in the set net fishing ground and at the breeding tank was measured, and recorded simultaneously on land and at sea with the telemeter device. When the input voltages of the transmitter is 100-300mV, the value of telemetering ambient noise and bio-acoustic underwater noise well agreed with that of the direct measurement. And the teleme-tered underwater noise decreases in proportion the distance between the transmitter and receiver.

• Korea and Global Affairs
• /
• v.1 no.1
• /
• pp.97-114
• /
• 2017

This article aims for searching the clue of North Korea nuke-problem by understanding it contextually. We must see this from the beginning as many trials in settling the problem have failed. North Korea nuke-problem is related to the change of international implication as well as the domestic process of its development. At first, it started from the regime survival, which evolved with the effect of learning. During the Cold War, its development had combined the principle of 'self-defense' because of Sino-Russia conflict. Particularly, its meaning varied dramatically due to the collapse of Cold War system plus the advent of post-Cold War system. North Korea nuclear program has became a global problem based on the deterioration of North Korea's security milieu and Bush administration's policy. Therefore, the area of common solution for NK nuke-problem must be found in the context of regime survival and the change of its meaning by continual convergence effort.

• Korean Journal of Legislative Studies
• /
• v.27 no.1
• /
• pp.41-77
• /
• 2021

It has been 20 years since the gender quota system for expanding women's political representation was enacted. However, the proportion of Korean women's representatives has not exceeded 20 percent. This study examines how the gender quota system, public funding for women candidates, and public funding for women's development, which are the three pillars of the legal system to expand women's representation, have changed systematically over the past 20 years, how they affected women's representation, and what institutional limitations they have. In addition, it explores the im/possible conditions of reforms for expanding women's representation. To reform the legal system for women's representation, it is necessary to understand that Korea's political system is arranged in a gender-based way in a male-dominated structure, while also understanding that the existence of critical actors and mass driving reforms for gender equality in politics is essential.

• Journal of the Korean Society for Library and Information Science
• /
• v.32 no.3
• /
• pp.113-126
• /
• 1998

This paper examines the influence of and in the process of collection building in public libraries. These events resulted in depriving library workers of their voluntary spirit. And these events have also become a main cause of ideological prejudices as reflected in collection building.

• Journal of Korea Game Society
• /
• v.9 no.4
• /
• pp.21-32
• /
• 2009

In this paper, we present a model of a virtual world that incorporates different time periods, in contrast to current popular virtual worlds like Second Life, to utilize the digital space fully. The construction of a virtual world in which we include historical information in the virtual life simulation utilizing the world map and current space information is proposed. The reason for incorporating time is that the virtual world varies according to the politics, economics, society, and culture of a particular time period, so users are able to play in a distinct virtual world as a resident and make their communities of their own free will. Like the online encyclopedia Wikipedia, the model proposed in this paper is a project designed to be maintained by and expanded through the interactivity of users, but unlike Wikipedia, users of this virtual world will be able to live and interact in a world of their own creation in addition to contributing real information.

• The Optical Journal
• /
• s.131
• /
• pp.18-21
• /
• 2011

세계 정치 경제 산업 질서에서 선진국이 유리한 위치를 선점한 이후에 후발주자의 진입을 막기 위해서 각종 국제제도와 규율을 강요하고 있는 일련의 행태를 "사다리 걷어차기"라고 한다. 제2차 세계대전 이후 후진국에서 선진국으로 도약하고 있는 나라가 전 세계적으로 손꼽히고 있으며, 우리나라는 그 중에 대표적인 나라이다. 국내 산업이 여러 분야에 걸쳐서 세계 초일류 수준에 도달했고, 세계 산업에서 중요한 축이 되었다. 국내 산업은 더 이상 선진국을 추격하는 입장이 아니고, 선진국 대열에 합류해서 세계시장을 리드해야 하는 산업 패러다임의 전환기에 있다. 이제부터 우리는 선진국의 "사다리 걷어차기"를 완전히 극복했는지 주위를 살펴보고, 기술 강국으로서 사업전략을 재편해야한다.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.5 no.2
• /
• pp.63-67
• /
• 1972

Preliminary creel-holding test of live anchovies which are to be used as bait for the skipjact fishery, was conducted on the fish caught by set net and lift net. They were held in the creels constructed with bamboo frame and minnow netting, during the period of Oct. 24-Nov. 28 in 1972. If was found that the survival rate of the creel-held anchovies varied by the size of fish, the towed distance and speed of fish-carrying creel in which the fish were accomodated after catchi. 1. The survival rate of the medium size anchovies, 7.8-9.6cm in length and 4.6-4.8 g in weight, was $70-92\%$ during the holding period of 20-35 days. Whereas, only $16\%$ of juvenile anchovies, 5.3cm in length and 1.0 g in weight, were survived for 19 hours after catch. 2. During the time of transport, the farther and faster the creel containing fish were towed, the less fish were survived in the subsequent holding period. 3. Though both the set net and lift net could be fairly used to catch live anchovy, no decision between these two gears could be made in this experiment to determine the superiorness for the subsequent survival rate.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.22 no.1
• /
• pp.90-98
• /
• 2018

Recently, various reinforced concrete joints have been used in reinforced concrete structures. Therefore, it is important to grasp the tensile properties of the spliced rebar. In this study, uniaxial tensile tests were conducted on Grade 60 D22(#7), D29(#9), and two kinds of couplers manufactured according to ASTM A615 standard for evaluating ductility of coupler joints. The strain was measured using an image processing method more accurate and capable of measuring at various points freely. As the result of uniaxial tensile test, it was possible to calculate the stress-strain relationship and the longitudinal strain distribution according to the stress stages and it was founded that the average strain becomes lower as more occupying the coupler joint portions in the same gauge length. In addition, the empirical equations are proposed to account for the effect of the length of the coupler on the ultimate strain and the rupture strain.