• Bulletin of the Korean Mathematical Society
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• v.52 no.1
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• pp.323-333
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• 2015

Let X be a compact metric space and let |A| denote the cardinality of a set A. We prove that if $f:X{\rightarrow}X$ is a homeomorphism and ${\mid}X{\mid}={\infty}$, then for all ${\delta}$ > 0 there is $A{\subset}X$ such that |A| = 4 and for all $k{\in}\mathbb{Z}$ there are $x,y{\in}f^k(A)$, $x{\neq}y$, such that dist(x, y) < ${\delta}$. An observer that can only distinguish two points if their distance is grater than ${\delta}$, for sure will say that A has at most 3 points even knowing every iterate of A and that f is a homeomorphism. We show that for hyperexpansive homeomorphisms the same ${\delta}$-observer will not fail about the cardinality of A if we start with |A| = 3 instead of 4. Generalizations of this problem are considered via what we call (m, n)-expansiveness.

• The korean journal of orthodontics
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• v.19 no.2
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• pp.109-120
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• 1989

We tend to consider only static occlusion such as molar relationship, canine key, and interdigitation at finishing stage. Of course, this static occlusion is important for post-orthodontic stability. But we should remember that mandible is always on the move during its various functions. If no pressure or too much pressure is put on during its functions, untoward tooth movement could occur. And tooth mobility, periodontitis, wear facet, bruxism, and far worse temporomandibular disorder could occur. After many studies have been done on what is a desirable occlusal scheme to strengthen post-orthodontic stability, today, "mutually protective occlusion" is recommended. If an orthodontist does not have understanding about this occlusal scheme during orthodontic treatment, the following conditions will be resulted after orthodontic treatment. I. Centric discrepancy 1. centric prematurity 2. sunday bite 3. molar fulcrum II. Eccentric discrepancy 1. posterior interference 2. anterior interference If we have deep understanding about these discrepancies that can happen after orthodontic treatment and their causes, corrections, and especially preventions against them, post-orthodontic stability could be strengthened and further temporomandibular disorder could be prevented.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.25.2-25
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• 2001

This paper describes a mobile robot intended for being employed in a multi-agent system. We have already proposed a multi-agent system which realizes patient-aid by helping a lying patient take a distant object on the table. In this paper, a mobile robot agent is developed and is included in the system. An effective man-machine communication strategy is proposed by use of a vision agent settled on the ceiling. If a human (assumed to be a patient) wishes to take an object distant on the floor, he points to the object. The vision agent detects the direction of his arm by image processing and guesses which object he intends to take. The vision agent asks him if it is what he wants and, if yes, the mobile robot runs to take and bring it to him. The system is overviewed with the explanation of a mobile robot. Some experimental results are shown with discussion.

• Journal of Radiation Protection and Research
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• v.34 no.3
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• pp.144-150
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• 2009

This study examines how much the radiation dose rate around it varies if a crack occurs on the spent nuclear fuel rod. The spent nuclear fuel rod to be examined is that of Kori unit 3&4. The source terms are evaluated using the ORIGEN-ARP that is part of the version 5.1 of the SCALE package. The radiation dose rate is assessed using the TORT. To check if the structure of a fuel rod is appropriately modeled in the TORT calculation, the calculation results by the TORT are compared with those by the ANISN for the same case. From the code simulation, it is known that if a crack occurs on the spent nuclear fuel rod, the neutron dose rate varies depending on what material is the crack filled with, but the gamma dose rate varies irrespective of type of the material that the crack is filled with.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.23
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• pp.71-91
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• 2004

The purpose of this paper is to examine the effects and problems of acceptance with modifications according to CISG Art. 19, comparing with UCC ${\S}2-207$. First of all this author raised two legal issues encountered when there is an acceptance with modifications. Scenario one is as follows : "Before either party has taken further action, there is a rise or a fall in the price of goods, was there a binding contract ?" The UCC rules provide for a contract if a purchaser sends out a purchase order and the seller sends back a sales acknowledgement form, and the items on the front(the price, description, and quantity) match up. The CISG on the other hand, is that most of the terms and conditions on the backs of the forms are important. Therefore, if they are different, there should not be a contract. Scenario two is as follows : "There has been performance, A disputes arises. What terms and conditions apply ?" The CISG and the UCC will probably lead to different results in the event the parties exchange conflicting forms and subsequently perform. Assuming that the offeree's reply contains terms that are materially different from the offer, the UCC provides that the resulting contract will include only those terms on which the writings of the parties agree, excluding conflicting terms. The CISG treats the material additions as a counter-offer and, in accordance with Art. 18, the offeree's performance may be regarded as an acceptance of a contract containing all of the offeror's terms ; or the offeror's performance may be regarded as an acceptance of a contract containing all of the offeree's terms. Second, this author raised three problems in the Art. 19 as follows ; 1) It is very difficult in practical application to decide what is material alterations even if the CISG lists material terms as an example. 2) There is a possibility for the offeror to speculate in the circumstance of market fluctuation as he has a change to object to the discrepancy in the offeree's reply. 3) There is also a possibility of inducement for the offeror or the offeree to send its own reply as a last shot.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.46
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• pp.211-235
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• 2010

According to the commercial law in Korea, a marine cargo insurance contractor (policyholder, insured person, agent) has the duty to disclose risks before establishing an insurance contract and the obligation to notify changes in risks after before establishing the contract. Marine cargo insurance policy clauses include one about the obligation to notify changes in risks. This clause assumes that an insurance contract should be implemented according to what has been answered to the important questions asked by the insurer in connection with the insurant's duty to disclose before establishing an insurance contract, and it stipulates that, if any change in what has been disclosed should be notified to the insurer since it is regarded as a change in risks. Neglecting the obligation to notify may lead to the termination of the appropriate insurance contract by the insurer. The problems here concern the clauses about changes in risks and about the obligation to notify. The problems are like these. Can it be that the circumstances which might be seen in the past as changes in risks according to the territorial sea laws and institute cargo clauses stipulated long ago are considered as such still today? And a marine cargo insurance policy till valid when changes in risks have not been properly notified by the original discloser of risks to the insured who currently holds the marine cargo insurance policy, which, unlike other insurance policies, is a marketable security? In Korea, the commercial law has a clause the obligation to notify changes in risks established based on the territorial sea laws and institute cargo clauses. In this regard, this study aims to consider if the clause still valid today or not and, if not, to propose alternatives to the clauses.

• Journal of Trauma and Injury
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• v.33 no.3
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• pp.195-203
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• 2020

The following key questions and recommendations are presented herein: when is airway intubation initiated in severe trauma? Airway intubation must be initiated in severe trauma patients with a GCS of 8 or lower (1B). Should rapid sequence intubation (RSI) be performed in trauma patients? RSI should be performed in trauma patients to secure the airway unless it is determined that securing the airway will be problematic (1B). What should be used as an induction drug for airway intubation? Ketamine or etomidate can be used as a sedative induction drug when RSI is being performed in a trauma patient (2B). If cervical spine damage is suspected, how is cervical protection achieved during airway intubation? When intubating a patient with a cervical spine injury, the extraction collar can be temporarily removed while the neck is fixed and protected manually (1C). What alternative method should be used if securing the airway fails more than three times? If three or more attempts to intubate the airway fail, other methods should be considered to secure the airway (1B). Should trauma patients maintain normal ventilation after intubation? It is recommended that trauma patients who have undergone airway intubation maintain normal ventilation rather than hyperventilation or hypoventilation (1C). When should resuscitative thoracotomy be considered for trauma patients? Resuscitative thoracotomy is recommended for trauma patients with penetrating injuries undergoing cardiac arrest or shock in the emergency room (1B).

• Journal of the Ergonomics Society of Korea
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• v.29 no.4
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• pp.595-604
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• 2010

Reaching up the present from the past, the design was reflected in our life, thereby having brought about great development in the aesthetic harmony or functional part. In the present era, it is advancing in order to seek for the better direction without being satisfied with formativeness. What comes to represent it is UX design, namely, user-experience design. If a user has confusion in using product or environmental facilities, or if a user needs to utilize by analyzing function, this cannot help being inconvenient. Only what a user's behavior is caused by which the cognitive and sensitive attributes interact without inconvenience can be said to be design for a user. Given explaining easily, UX implies to design and develop the designed product or space from the position of a client who uses. Also, it also implies to offer service of being satisfied. For one example, a work can be said that distributes logo to the upper part of web site. That is because of allowing client to be much confused if logo is distributed to the different position. The designed web site in consideration of user's position is developed much now. However, it is the real situation of being still much insufficient in the public facilities that have UX characteristics amid the living environment. There is great interest in UX of the public facilities. However, there are many cases of facing mostly for the first time. The understanding level is thought to be much different. This study examines about a concept of UX design, and about UX design, which considered from the user's position, and analyzes a case. Thus, the aim is to suggest good directivity in designing by efficiently approaching UX that can be difficult theoretically.

• Journal of the Daesoon Academy of Sciences
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• v.17
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• pp.135-149
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• 2004

Socrates did not found a religion, and in this sense he is different from Confucius, Buddha and Jesus. So there can be no 'Socrates' religion'. But if we can assume that there are evidently religious aspects in his thought, and if it can become a religion by expanding these aspects, then we may conclude that 'Socratic religion' is possible. In general, there are three arguments to regard Socrates as a religious person. The first is to see him as a precursor of Christianity or a Christian martyr, the second is to regard Socrates' daimonion as identical with Christian revelation, and the third is to argue that Socrates was a religious person because of his firm belief in the immortality of soul. But in this paper, I argue that these three arguments offer some justifications but insufficient to conclude that he was a religious person. Shall we conclude then that not only Socratic religion is impossible but also he was not a religious person? I do not think so. For there are two counter arguments. Religious truths have at least two essential characteristics. First, those who have religious truths are absolutely happy, no matter what. This is why Socrates as a religious person could advise his disciples to improve their souls even at the time of his death bed. Second, those who have religious truths do love others, no matter what. How could it be possible for someone to love invisible ultimate reality if he did not love visible brothers? This is why Socrates as a religious person took his mission to philosophize as a divine command. Socrates did not initiate any official religion, but he was truly a devout religious person, who transcended the boundary of institutionalized religion. It follows that Socratic religion is evidently possible.

• Lingua Humanitatis
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• v.6
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• pp.109-145
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• 2004

Social scientists in North America, especially anthropologists, folklorists and linguists, who focus on the study language use and its connection to society, use a variety of labels to describe what they do. Among the best known are 'anthropological linguistics' , 'linguistic anthropology', and 'sociolinguistics'. All of these labels imply that their focus is on the study of language usage in society and culture for their teaching, research and publications. In this paper I am examining the intellectual issues and history that underlie the differences in the labels. The differences and similarities that characterize them are discussed. The author proposes 'linguistic anthropology' as the most useful disciplinary terminology if the study of language combined with culture is to be 'community-centric' and not only 'profession-centric' . He encourages a renewed focus on working with communities. Also, a need to find ways to engage Indigenous members of minority language communities more actively should be a primary goal in the process of 'academic' language work. This is important due to the loss rapid extinction of the many of the world's languages. The author points out that it does matter what we call the work we do, as a label may carry a message of meaning, intent and focus.