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

• Journal of English Language & Literature
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• v.57 no.5
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• pp.813-838
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• 2011

Toni Morrison's ninth novel A Mercy delves into the colonial American history of the seventeenth century when Europeans began to migrate to the New World and when the first slaves were brought to Virginia. Morrison presents a diverse group of people such as white Europeans, an American Indian, a free black man, indentured servants, and slaves from Africa in order to explore the subjects of ownership, freedom and racism. She emphasizes the fact that most of the Europeans who came to America in the early seventeenth century were the people who were thrown out from the society such as felons, prostitutes, servants and children. By portraying how these castaways tried to settle in a new environment surrounded by unknown dangers and challenges, Morrison demystifies and reconstructs the myth of the birth of America as a nation state. In continuation of Morrison's writings about love and the betrayal of love, her novel A Mercy explores the subjects of trauma, memory and subjectivity by choosing the topic of motherly love and its betrayal which she dealt with poignantly in Beloved. The female protagonist, Florens, is given away by her mother in partial payment of debt incurred by the owner of Florens's mother. The traumatic memory of Florens's separation from her mother shapes Florence's character. She has to revisit the site of the original traumatic experiences of being given up by her mother in order to reconstruct her fragmented memory and past. The recurring dream of the traumatic incident that takes hold of Florens can be explained by the trauma theory of Freud, Cathy Caruth, Suzette Henke, and Judith Herman. The paper explores the self journey of Florens in which she faces the traumatic past and comprehends its meaning which enables her to construct her subjectivity by understanding the true meaning of being free and of owning oneself. In particular, it demonstrates how the process of writing a confession, a story about one's history, enables one to reclaim the traumatic experience and to locate it in the narrative memory.

• Journal of English Language & Literature
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• v.56 no.5
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• pp.823-850
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• 2010

In this paper, I will explore disparate voices embedded in the interactions of stories in which personal, cultural, historical, and mythical consciousness brings up diverse ideas about the experiences of Native Americans. The accommodation of differences and changes is clearly manifested through the healing ceremony of Tayo, which poses some practical questions: what could be the authentic tradition of Native Americans?; which direction should it be led to? As these questions suggest, Tayo needs to think over and work through the way that Native oral stories will enrich the signification of being Indian within multicultural U. S. society. In other words, Tayo should transfer the oppositional relationship between Anglo and Native American world into an interactive one to bring forth new meanings concerning their interactions. As a hybrid, Tayo begins to recognize that his fragmented consciousness could represent the pervasive but surmountable anxiety about the cultural clash between Native and White Americans. Going through the multiple layers of his stories, Tayo learns that Native Americans need to hold a balanced viewpoint firmly: this demonstrates that storytelling brings restoration and renewal to him. As a result of Betonie's healing ceremony and his intimate relationship with Ts'eh, Tayo comes to have a holistic comprehension about how all the living things are interconnected to one another. After acquiring this recognition, Tayo succeeds in his quest to get back Josiah's cattle and recovers his identity as a Laguna Pueblo Indian, still letting diverse voices, cultures, and stories flow into the process of storytelling. As the last scene in which the conversations among Tayo, Auntie, and Grandmother took place illustrates, Tayo has newly secured a position that will require him to create a new, alternative story, not just repeating previous stories.

• Journal of Daesoon Thought and the Religions of East Asia
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• v.3 no.2
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• pp.13-34
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• 2024

This article is a compilation of civilizational crises and their overcoming from the worldview of Daesoon Jinrihoe, based on the premise that religion can offer advice on the crises faced by modern civilization. It is a reinterpretation of human history from a religious perspective, focusing on mutual contentions, grievances, grudges, and their overcoming. Daesoon Jinrihoe explains that modern civilizational crises were first recognized by divine beings in the 18th and 19th centuries, and then later recognized by humans in the 20th and 21st centuries. Unable to resolve the civilization crises, the divine beings asked the Supreme God to intervene in human history, and the Supreme God was born in a human body to reveal the root causes and development of various civilizational crise sand to propose solutions to overcome them. These solutions encompass setting the world aright and ushering in a new era through the Reordering Works of Heaven and Earth (天地公事), attaining enduring peace by practicing grievance resolution for mutual beneficence (解冤相生), and reconstructing the relationship between divine beings and humans in harmonious coexistence. Devotees hold that Daesoon Jinrihoe is a religion that originated as a solution to a problem faced by God rather than humankind. As such, it considers the crises of civilization and their overcoming as the reason for existence. According to the religion's worldview, the Supreme God has already provided the solution to these civilizational crises. With a tip of the hat to the film Interstellar (2014), it could be said, "God Found a Way. He Always Has." Now, Daesoon Jinrihoe posits that it is up to humans to implement the way that God found.

• Information Systems Review
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• v.19 no.1
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• pp.185-202
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• 2017

Most studies based on production function theory have concluded that economic growth is a result of information technology (IT) capital use. However, some studies have indicated that economic growth is a determinant of IT investment. To determine if these results also hold at the industry level, we use the Granger causality test to analyze bidirectional causality with industry-level data for 1977~2007 from the United States. The results generally reveal that IT investment causes economic growth in many industries under the concept of Granger causality, that economic growth causes IT investment in some industries, and that IT investment is not associated with economic growth in some industries. In the country-level time-series data made by summing up the IT capital and gross output for each industry, the results do not show any causality between IT investment and economic growth. However, they show bi-directional causality between IT investment and economic growth in the panel data. These results may be a source of IT productivity paradox.

• Analytical Science and Technology
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• v.37 no.4
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• pp.211-219
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• 2024

This study presents a sensitive and reliable method for determining tetracycline (TC), oxytetracycline (OTC), and chlortetracycline (CTC) residues in shrimp samples. A two-step process involving liquid-liquid extraction (LLE) followed by solid-phase extraction (SPE) was developed prior to HPLC analysis. The target analytes were effectively extracted using EDTA/McIlvaine buffer (pH 4.0): methanol (80:20, %v/v), with subsequent clean-up using a C18 SPE cartridge. HPLC separation was conducted on a C18 column (250 mm × 4.6 mm i.d., 5 ㎛) at 30 ℃, using 0.01 % trifluoroacetic acid (A) and acetonitrile (B) as the mobile phase. A gradient elution protocol was applied, transitioning from 85(A):15(B) %v/v to 70(A):30(B) %v/v at 7 min, with a 5 min hold, followed by adjustment to 85(A):15(B) %v/v for 13-14 min. The detection was performed using photodiode array (PDA) at 365 nm with a flow rate of 1.0 mL/min. The calibration curves exhibited good linearity within a concentration range of 0.4-6.0 ㎍/mL (R² > 0.995). The limits of detection (LOD) for TC, OTC, and CTC in shrimp were 0.034, 0.029, and 0.021 ㎍/mL, respectively. The limits of quantitation (LOQ) for TC, OTC, and CTC were found to be 0.114, 0.097, and 0.071 ㎍/mL, respectively. Recoveries of TC, OTC, and CTC from spiked shrimp samples ranged from 91.0 % to 95.5 %, 92.4 % to 97.2 %, and 93.3 % to 96.6 %, respectively. This method was successfully applied to the determination of TC, OTC, and CTC residues in shrimp samples sourced from various local markets.

• Culinary science and hospitality research
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• v.10 no.3
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• pp.135-154
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• 2004

This study surveyed ancestral service preparation and sacrificial consciousness of housewives living in Pusan and Yeosu area. Statistical analysis of chi-square test was carried out by using SAS program. The results are summarized as follows. l. In major general characteristics of subjects, the forties(35.56%), Buddhism (57.79%), high school education(52.54%), a couple with children(63.45%) were the most abundant. 2. The time of sacrificial rites in both areas was usually hold from 23:00 to 01:00 (47.16%). The housewives having a job hold earlier the service than the full-time housewives(p<0.05). 3. The range of ancestor-memorial rites was usually up to 3rd generation(34.47%). The leader of sacrificial ceremony was mainly the eldest grandson by the eldest son (78.28%) in the old subjects and a person of wealth in the young subjects(p<0.05). 4. There were more positive answers for the necessity of a sacrificial ceremony (57.32%). Older than 50 years of subjects thought the sacrificial rites should be held(70.77%), while as the age of subjects was younger, they realized less necessity for that(p<0.05). Sacrificial consciousness was higher in Buddhists than the other religionists(p<0.0001). The sacrificial rites was thought to be needed for their harmonious family(50.43%). Younger subjects thought that it is necessary to succeed that as the tradition, while older housewives thought that it would contribute toward peace in their family(p<0.05). Buddhists and Christians answered that it was good for harmonious family, and Catholics and the others for tradition(p<0.01). Their consideration of sacrificial rites in the future was higher in keeping the traditional practice (37.04%) and Buddhists took higher these consideration(43.17%). Considering the sacrificial consciousness, there were statistical differences among the religionists (p<0.0001). The eldest daughter-in-raw had a different opinion about the following up the method of sacrificial ceremony from second eldest daughter-in-raw and the next one(p<0.05). The housewives in Pusan were showing more the affirmative attitudes to keep the traditional practice than those in Yeosu.

• Journal of Korean Society of Transportation
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• v.27 no.2
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• pp.157-168
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• 2009

The random utility theory and the multinomial logit model (including a more recent variant--the mixed multinomial logit) derived from it have constituted a back bone for theoretical and empirical analyses of various travel demand features including mode choice. In their empirical applications, however, it is customary to specify random utilities which are linear in modal attributes such as time and cost, and in socio-economic variables. The linearity helps easy derivation of important information such as value of travel time savings by calculating marginal rate of substitution between time and cost. In this paper the author focuses on the very linearity of the random utilities. Taking into account the fact that the mode chooser is also labour supplier, commodity consumer as well as leisure-seeker, the author sets up a maximization model of the traveller, which encompasses various economic activities of the traveller. The author derive from the model the indifference curve defined on the space of modal attributes, time and cost and investigate under what conditions the random utility of the traveller becomes linear. It turns out that there exist the conditions under which the random utility is really linear in modal attributes, but the property does not hold when the traveller has a corner solution on the space of modal attributes, or when the primary utility function of the traveller is directly affected by labour provided and/or the travel time itself. As a corollary of the analysis, a random utility is suggested, approximated up to the second order of the variables involved for empirical studies of the field.

• Journal of Korean Ophthalmic Optics Society
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• v.16 no.2
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• pp.107-115
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• 2011

Purpose: To design and fabricate the distributed auto edging machine for the development. Methods: We got the necessary data needed in design by using CAD. Based on the these data, we fabricated the trial product for the development of the distributed auto edging machine. Results: The patternless mode could be operated by receiving the eyesize data from the auto lay-outer with the RS232C transmission system and the pattern mode could be operated by setting the pattern on the left side of the machine. The distributed auto edging machine were composed with combinations of many elements; head, auto arm, pattern clamp and grinding wheels. The head part controlled the grinding of ophthalmic lens by operating the vertical and horizontal motors. The wheels part was comprised of glass mode, plastic mode, V-bevel mode and polish mode. The slide in the auto arm was equipped on the below of the patten and the slide could hold up the pattern which was rotated by fixed shaft. The pattern clamp could move the head part to the up and down or right or left way by the manual operation of optometrists. Conclusions: We could succeed in making the trial product by applying it to the development of the distributed auto edging machine which could be used as the patternless mode and pattern mode, selectively. Therefore, it was confidently expected that this product was very helpful for the optometrists to dispense the ophthalmic lens because of its cost-efficiency and convenience.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.5 no.2
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• pp.50-56
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• 1972

This study has been carried out to observe the driving and the intercepting effects of air screen on some sea-water fishes ; Chrysophrys major, Mylio macrocephalus, Fugu pardalis. 1. By perforating fine holes on the compressed air pipes, air screen was formed in the water, and this screen was set at $45^{\circ}$, and $90^{\circ}$ against the fish passage to observe the reactions on the part of the fish. 2. Changes were given to the location of the air screen in the water to observe how the air screen drived the fish to its direction. 3. The effective distance between holes on the air piprs was determined by a series of experiments of setting up two air screens of various types in hole distance, by moving a screen to-ward the other, and of observing the distance between two screens when fish eseape through the space. The results of the above experiments observed as follows were : 1. The passage of fish was effectively intercepted by setting up the air screens at 45 degrees against the fish passage and it was also intercepted when the screen was set at 90 degrees against the passage. 2. Fish could be driven by moving the air screen toward the fish. 3. The air screen formed from the pipe above than 0.3mm in diameter was effective, but less than 0.2mm was not sufficiently effective. 4. The strength of the air pressure in the pipe should be higher than $0.087kg/cm^2$. 5. The fish holding ability to obtain effective air screen was ranged as following when the air pressure was $0.160kg/cm^2$. and the hole diameter was 0.3mm on the 12.6mm pipe, depending upon the intervals of the holes on the pipe: The shortest distance which could hold fish between two screens was 59.4cm when the holes were perforated at every 40cm; 33.5cm when at every 30cm; 28.75cm when at every 10cm: and 27.25cm when at every 5cm. Thus, no significant change was at served when the holes were perforated more densely than 30cm intervals. Therefor the hole intervals should be 30cm in designing fishing gear employing air screen.