• Title/Summary/Keyword: Encounter bearing

Search Result 5, Processing Time 0.021 seconds

Distance Identification for Maximum Change in Ship Collision Risk through a Coast Guard Patrol Ship Experiment (해양경찰 함정 실험을 통한 선박충돌 위험도의 변화가 최대인 거리 식별에 관한 연구)

  • Kim, Dae-Sik;Yim, Jung Bin
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.23 no.5
    • /
    • pp.447-454
    • /
    • 2017
  • Using two large coast guard ships at sea, we created four encounter situations ($000^{\circ}$, $045^{\circ}$, $090^{\circ}$, $135^{\circ}$) with high possibility of collision, from 3 NM up to 0.25 NM. As relative distance was gradually decreased, the subjects were measured at 0.25 NM intervals and perceived ship collision risk (PSCR) was determined by looking at the opponent ship. Characteristics were statistically analyzed using the obtained data. The purpose of this study was to analyze the characteristics of collision risk values obtained from twelve intervals, from 3 NM to 0.25 NM relative to encounter situations by curve fitting with appropriate polynomials, to determine the distance from which the change in perceived collision risk is greatest. As a result, an optimal regression equation for each distance interval was derived from each analysis direction. The greatest variation in average collision risk value was over the range 1.25 ~ 1 NM, and the collision risk value was largest at 1 NM. The maximum change in perceived collision risk was at 1 NM. These results can contribute to preventive guidelines to minimize human error in close proximity situations with a high probability of ship collision.

Study on the Evaluation of Ship Collision Risk based on the Dempster-Shafer Theory (Dempster-Shafer 이론 기반의 선박충돌위험성 평가에 관한 연구)

  • Jinwan Park;Jung Sik Jeong
    • Journal of the Korean Society of Marine Environment & Safety
    • /
    • v.29 no.5
    • /
    • pp.462-469
    • /
    • 2023
  • In this study, we propose a method for evaluating the risk of collision between ships to support determination on the risk of collision in a situation in which ships encounter each other and to prevent collision accidents. Because several uncertainties are involved in the navigation of a ship, must be considered when evaluating the risk of collision. We apply the Dempster-Shafer theory to manage this uncertainty and evaluate the collision risk of each target vessel in real time. The distance at the closest point approach (DCPA), time to the closest point approach (TCPA), distance from another vessel, relative bearing, and velocity ratio are used as evaluation factors for ship collision risk. The basic probability assignments (BPAs) calculated by membership functions for each evaluation factor are fused through the combination rule of the Dempster-Shafer theory. As a result of the experiment using automatic identification system (AIS) data collected in situations where ships actually encounter each other, the suitability of evaluation was verified. By evaluating the risk of collision in real time in encounter situations between ships, collision accidents caused by human errora can be prevented. This is expected to be used for vessel traffic service systems and collision avoidance systems for autonomous ships.

A Study on First Demand Guarantees in International Construction Projects -Disputes arising from the DG and Recommendations for their Drafting- (해외건설공사에서 독립보증에 관한 분쟁과 그 대책)

  • Choi, Myung-Kook
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
    • /
    • v.47
    • /
    • pp.129-156
    • /
    • 2010
  • Since the 1970s, international construction employers have commonly requested first demand guarantees upon their contractors as a form of security for due performance of their works. Contractors prefer the greater protection offered by more traditional forms of security requiring presentation of an arbitral award or other evidence of the caller's entitlement to compensation. Many contractors nonetheless feel that they have no alternative but to provide these unconditional guarantees in order to compete. However, these unconditional first demand guarantees are controversial and have given rise to numerous disputes both in arbitration and litigation. Disputes arising from first demand guarantees can be broken down into a) applications to prevent a perceived fraudulent or otherwise unfair or improper calling of a guarantee, b) claims arising from such abusive calls and c) claims relating to the consequences of such calls even if the call itself may not be abusive as such. The contractors should carefully assess the risk of an abusive call being made bearing in mind the difficulties he may face in seeking to prevent such a call. He should also bear in mind the difficulties, delays and cost he is likely to encounter in seeking to recover any monies wrongfully called. One option would be to provide that the call can only be made once and to the extent that the employer's damages have been assessed or even incurred or even for the default to have been established by an arbitral tribunal or court. Another option would be to provide that any call be accompanied by a decision of a competent and impartial third party stating that the contractor is in breach. For example, such a requirement could be incorporated into a construction contract based on the FIDIC Conditions by submitting this decision to a Dispute Adjudication Board. Another option would be to provide for the "ICC Counter-Guarantee Scheme". In sum, there would appear to be room for compromise between the employer and the contractor in respect of first demand guarantees by conditioning the entitlement to call such guarantees to the determination of a competent and impartial third party.

  • PDF

Aspects of Melancholy and Death in Poetry and Prose by Sylvia Plath (실비아 플라스의 시와 산문에서 우울증과 죽음의 양상)

  • Choi, Tae-Sook
    • Journal of English Language & Literature
    • /
    • v.55 no.4
    • /
    • pp.641-659
    • /
    • 2009
  • Since Plath killed herself in 1963, the theme of death has become one of the central motifs and allusions in her work. The biographical emphasis continues to blur the boundary between the artistic world and the material world. While approaching Plath's work from the perspective of personal experience, the objective of this paper is not to suggest that we encounter Plath's personal voice and emotions directly in her work. Rather, I emphasize how Plath's work of mourning is substantiated in the act of writing. Plath protects herself from the unnamable or the existential void by writing poems. She shows the way in which art or writing enables the subject to confront traumatic memory. While the death drive propels Plath towards destruction, artistic formation serves to alleviate her psychic crisis. What I shall suggest in the paper is how works of art lead the melancholic subject to challenge traumatic events. Plath herself suggests the therapeutic power of language. Plath's hostility toward women as well as men situates her work nearer to the Kristevan psychoanalytic theory which examines depressive anxieties intrinsically linked to the loss of maternal objects. Kristeva's particular focus on the concept of "death-bearing mother" or the unnamable offers a fruitful reading of the representation of infantile fantasies, sexuality, anger, and ambivalence toward lost loved object which clearly dominates most of Plath's poems. Kristeva elaborates mourning and melancholia through the framework of signification and it is of especial relevance in deciphering the recurring death drive and melancholic rage in Plath's work. Melancholic subjects in Plath's work are characterized by an amorphous state, occupying a borderline state regulated by the death drive.

Healing Effect of 'Creative Writing' on Individual and on Our Age - Focused on the 'Man of Darkness (Vampire)' Symbol - ('창조적 글쓰기'가 개인 및 시대에 미치는 치유적 작용 - '어둠의 남자(Vampire)' 상징을 중심으로 - )

  • Kye-Hee Kim;Ki-Won Kim;Eun-Seun Han
    • Sim-seong Yeon-gu
    • /
    • v.28 no.1
    • /
    • pp.1-49
    • /
    • 2013
  • This article started with 'encounter'. Both authors met around the middle of February and discussed the subject for the inhospital conference presentation scheduled at the break of June. Having conversation like "Movies similar to fairytales heard from childhood are standing out conspicuously among commercial films which are attracting audiences and receiving fervent response these days. This phenomenon is marvelous and mysterious." together, and sharing this and that, the conversation turned naturally to 'Bram Stoker's Dracula', 'Series of Twilight', and 'Warm Bodies', both authors found out the fact that we saw these movies in common with propound impression. Feeling our hearts beating high, bit of fear and hesitation followed simultaneously at the moment when both of us encountered the idea to choose subject of conference presentation related to this and expressed one in words. While preparing for the conference, presenting to others, and having discussion with the audience, our hearts have been filled with Presentation was finished after active discussion beyond fixed hour and it also brought audience (among those present) to show strong emotional response both positively and negatively. At first, we just had a thought to put aside the content of presentation, but we felt lack of something else, lingering in our minds. We finally decided to accomplish our work into an article leading to submission, based on the advice and recommendation from one of the audience. This article is a small 'creative writing' born by sharing both authors' passion and enthusiasm. In the first part of this article, we have introduced the dream of 31-year-old woman's which led to the 'creative writing' and spotlighted her personal life, before and after the dream. In the second part, we have examined the consequence (way of realization) and meaning of creative impulse shown from or experienced from personal unconsciousness (dream, fantasy) together. Creative impulse shown from the individual appeared to bring creative transformation of individual personality through the process of 'introversion'. Otherwise it also appeared to be delivered as a masterpiece through 'creative writing' or from the process of 'extroversion'. Sometimes both consequences happened at once. We tried to examine and interpret the dream of 31-year-old woman's, which was introduced in the first part of this article, that is to say, the dream of 'Stephenie Meyer's, the author of the 'love between vampire boy and ordinary human girl' themed novel 'Twilight Series', in a psychoanalytic perspective. In the third part, highlighting individual dreams and three different movies 'Bram Stoker's Dracula', 'Twilight Series', and 'Warm Bodies', we found the transformation of symbol 'Man of Darkness, vampire' seen in each individual dreams and in some specific popular arts, such as novels and movies, receiving fervent response from people. We also found love between this symbol and humane woman, bearing fruit together with very impressive change shown in the attitude of 'Man of Darkness' (vampire)'s conscious ego and mutual relationship pattern. We contemplated this phenomenon, the reason why these events happen, and what kind of association presents among these events, individual, and this era and discussed the effects on individuals and this era, at present. 'Creative impulse', originated in the deep structure of human mind is realized as a 'transformation of individual personality' or masterpiece through artistic creation. If it has a chance to make a match with this era, shared by a lot of contemporary people, it also appears to bring positive effect as healing and salvation to each individual or to each era. From this article, we mainly highlighted positive and healing aspects of individual 'creative impulse'. We hope to deal with the negative consequences and their reason coming from 'creative impulse', if the occasion arises, in the future with a new article.