• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2008.03a
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• pp.813-822
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• 2008

The present work has been developed the interpretation processor including analysis of the failure stress in pyrotechnically releasable mechanical linking device, which has the release characteristic without fragmentation and pyro-shock, using SoildWorks, COSMOS Works and ANSYS programs. The aim of the invention is to propose a pyrotechnically releasable mechanical linking device for two mechanical elements that does not suffer from such drawbacks. The pyrotechnically releasable mechanical linking device according to the invention is simple, compact and inexpensive in structure. It is simple to implement and permit the use of only a reduced quantity of pyrotechnic composition, such composition possibly being devoid of any primary explosive at all. The present work is only focused on the design of structure and the material characteristics. To analyze the fracture morphology resulted from tensile test in the different ball type bolts, the present work has been performed to estimate the failure stress of material and to make the same result from tensile test. The failure stress of SUS 630 in ductile material is approximately 1050 Mpa. The failure stress of SUS 420 in brittle material is about 1790 Mpa. Among the models used the ductile material, the model 6 is suitable a design of structure compared to that of other models. The use of this interpretation processor developed the present work could be extensively helped to estimate the failure stress of material having a complex geometry such as the ball type bolt

• Proceedings of the Korean Nuclear Society Conference
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• 1999.10a
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• pp.247-247
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• 1999

This paper describes a new mechanistic thermal conductivity model considering the heterogeneous microstructure of MOX fuel. Even though the thermal conductivities of MOX have been investigated numerously by experimental measurements and theoretical analyses, they show the large scattering making the performance analysis of MOX fuel difficult. Therefore, a thermal conductivity model that depends on the heterogeneous microstructure of MOX fuel has been developed by using a general two-phase thermal conductivity model. In order to apply this model for developing the thermal conductivity for heterogeneous MOX fuel, the fuel is assumed to consist of Purich particles and U02 matrix including Pu02 in solid solution. Since little relevant data on Purich particles is available, FIGARO and SiemensKWU results are only used to characterize the microstructure of unirradiated and irradiated fuel. Philliponneaus and HALDEN models are selected for the local thermal conductivities for Purich particles and matrix, respectively. Then by combining the two models, overall thermal conductivity of MOX fuel is obtained. The new proposed model estimates the MOX thermal conductivity about 10% less than the value of U02 fuel, which is in the range of MOX thermal conductivity from HALDEN. The developed thermal conductivity model has been incorporated into KAERIs fuel performance code, COSMOS, and then verified using the measured data in the FIGARO program. Comparison of predicted and measured temperatures shows the reasonable agreement within acceptable error bounds together with satisfactory results for the fission gas release and gap pressure.essure.

• Proceedings of the Korean Nuclear Society Conference
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• 1999.10a
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• pp.248.1-248
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• 1999

Preliminary analysis of in-reactor thermal performance of three MOX fuel rods, which are going to be irradiated in the Halden reactor beginning in the first Quarter of the year 2000 under the framework of the OECD Halden Reactor Programme, have been conducted by using the computer code COSMOS to ensure their safe operation. Parametric studies have been carried out to investigate the effect of uncertainties on in-reactor behavior by considering the four kinds of uncertainties; thermal conductivity, linear power, manufacturing parameters, and model constants. The analysis shows that, in the case of annular MOX -1 fuel, calculation results for thermal performance vary widely depending on the selection of model constants for fission gas release (FGR). On the contrary, the thermal performance of solid MOX - 3 fuel does not depend on the choice of FGR constants to a large extent as MOX-I, because the fuel temperature is very high in the MOX-3 irrespective of the choice of FGR constants and hence the capacity of grain boundaries to retain gas atoms is not large enough to accommodate the number of gas atoms reaching the grain boundaries. It is planned that when the data on microstructure and thermal conductivity for each type of MOX fuel are available, new analysis will be made using these information. In addition, FGR model constants will be derived from the measured fuel centerline temperature, rod internal pressure and other related data.

• Journal of Daesoon Thought and the Religions of East Asia
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• v.1 no.1
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• pp.103-125
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• 2021

This paper deals with figurative meanings of Haewon-sangsaeng. It is an investigation which is both semantic and diachronic. In the first part, important implications of sangsaeng (or xiangsheng in Chinese) in the context of correlative cosmology are extensively explored. Among others, saeng (in Chinese sheng) as a powerful metaphor and its related Chinese compounds are broadly discussed. In the second part, the evolution of ideas of yuan (or won in Korean) in Chinese history is explicated. Above all, in the traditional Chinese cultural milieu, wrongful treatments which make victims feel themselves aggrieved are socio-politically orientated. The Scripture on Great Peace (Taiping Jing) is used as reference point to elucidate the essential points of yuan and its knots. However, the advent of Buddhism in East Asia adds a new dimension to the understanding of yuan (won). Accumulated yuan as karmic bond thus gives a new identity of yuan as predetermined animosity. Widely recognized idioms like "adverse relatives and karmic debtors" and indigenous Chinese Buddhist rituals like Repentance Ritual of the Emperor Liang bear witness to this transformation of the meaning of yuan in East Asia. The fruitful yet correlated meanings of yuan also make the endeavor of untying yuan deeply significant and important to human society. Haewon-sangsaeng, as a religio-ethical ideal, brings out an amicable and harmonious relationship among myriad beings in the cosmos.

• Restorative Dentistry and Endodontics
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• v.44 no.2
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• pp.15.1-15.8
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• 2019

Objectives: The aim of this study was to investigate whether the diameter and direction of the plunger and simulation of the periodontal ligament (PDL) affected the stress distribution in endodontically treated premolars. Methods: A fracture strength test was simulated via finite element analysis. A base model was set up, and the following parameters were modified: plunger diameter (3 mm vs. 6 mm), plunger direction (vertical vs. $135^{\circ}$ angular to the central fossa), and PDL simulation. The analysis was conducted using the CosmosWorks structural analysis program, and the results are presented in terms of von Mises stresses. Results: The smaller plunger increased the stresses at the contact area of the crown, but the plunger diameter had no effect on the stress distribution within the root. An angular plunger direction increased stresses within the root, as well as at the buccal cusp of the crown, compared with the vertical direction. Simulation of the PDL caused higher stress accumulation, especially in the cervical region of the root. Conclusions: The plunger diameter had no effect on the stress distribution in the roots, whereas the plunger direction and PDL simulation did affect the stress distribution. More stringent standards can be established by taking such parameters into account when performing fracture testing in future studies.

• Journal of English Language & Literature
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• v.64 no.2
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• pp.299-305
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• 2018

Near / Miss, Charles Bernstein's poetry collection, is replete with poems of distinctive styles and pluralistic forms in his idiosyncratic and artistic cosmos. With poetic antics, queerness, sarcasm, irony, and humor, the book showcases the motif of loss, chaos and trauma in postmodern America and the world. The multiplicity and multi-dimensional $M{\ddot{o}}bius$ effect in Near / Miss echo earlier Bernstein's poems, as well as poems by ancient and contemporary poets, with visual artists and musicians, and rabbis and Jewish philosophers. I argue that Near / Miss offers an apotheosis of echopoetics, which has been launched in his previous book Pitch of Poetry. Poems in the book reveal the dark and thick "pitch," namely the queer, the uncanny, the invisible, the disabled, the dispossessed, and the silenced poetic Other and make it explicit. The estrangement and alienation of $clich{\acute{e}}$ through diverse malaprops, mondegreens, non-sequiturs and fragmentations in Near / Miss aim at deconstructing the fixation of language so as to display the poetic Other. The motif of "nothingness" in echopoetics significantly multiplies its meanings. Nothingness mainly refers to the loss of origin, the defiance of tyranny, and the sublimity of the universe and the poetic Other. Melding his personal loss and misfortune, the current political discontent and the postmodern chaos in America and the world, nothingness in echopoetics resonates with American literary tradition and Zen with a healing and transforming power.

• Journal of Daesoon Thought and the Religions of East Asia
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• v.2 no.1
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• pp.57-83
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• 2022

Numbers structure reality and define the way people live. Both in Daoism and in Daesoon Jinrihoe they signify key concepts, notably the cardinal numbers from one through nine that classify different dimensions of the cosmos. Beyond these, the number twenty-four plays an important role. In a temporal mode, it marks the divisions or seasonal periods of the year. Consisting of fifteen days each, these periods signal (and are named after) changes in dominant weather patterns and the position of the sun. Generally activated in the body through particular seasonal activities and dietary prescriptions, in Daoism they are also the root of a series of healing exercises and certain refinement practices of internal alchemy. In Daesoon Jinrihoe, moreover, they are activated by chanting a specific incantation that invokes the twenty-four divine rulers of the divisions, originally a group of Tang Dynasty officials that in nature and function resemble the spirit generals of the early Celestial Masters. Beyond this, the number twenty-four also applies to space. Not unlike the twenty-eight lunar stations or mansions, traditional cosmology acknowledges twenty-four directions, made up of six constellations each in the four cardinal directions, complete with starry deities and divine generals. Their powers are activated with the help of written characters rather than vocal incantations, using techniques common both in Daoism and Daesoon Jinrihoe.

• Journal of Daesoon Thought and the Religions of East Asia
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• v.1 no.1
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• pp.39-60
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• 2021

This essay analyzes the meaning of "modern civilization" and the ways it relates to religion conceived as a "The Fellowship of Daesoon Truth (Daesoon Jinrihoe)." We take the expression "Fellowship of Truth" in the broadest sense as indicative of a human companionship with the true nature of the Real. We therefore understand the term to be practically equivalent with the concept of "religion" as connoting the ideas of bond, relationship, debt, and duty toward the Ultimate Reality, toward fellow human beings, and toward the cosmos in general. On this basis, our intent is to assess the nature and limits of the relationship between religion as a fellowship of the Truth and the tenets of modern civilization. Within this overarching perspective, the case of Daesoon Jinrihoe is particularly significant and fruitful for two sets of reasons. Firstly, this is so because Daesoon is typically branded a "new religious movement" open to modernity while it is also true that at least some of its representatives are wary of the negative implications of the modern world. Secondly, the significance of a study of Daesoon in light of the notion of religion as a "The Fellowship of the Truth" lies in that it asserts being rooted in tradition, which raises the question of its relationship with modernity.

• Publications of The Korean Astronomical Society
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• v.38 no.2
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• pp.25-36
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• 2023

Since interstellar objects like 1I/'Oumuamua and 2I/Borisov originate from exoplanetary systems, even if we do not visit the exoplanetary systems, flyby, rendezvous, and sample return missions of interstellar objects can provide clues to solve the mysteries of cosmic life phenomena such as the origin of exoplanetary systems, galactic evolution, biosignatures (or even technosignatures), and panspermia. In this paper, we review space missions for interstellar object exploration in the stage of mission design or concept study such as Project Lyra, Bridge, Comet Interceptors, and Lightcraft^TM. We also review space missions, OSIRIS-REx and NEA Scout, designed for Near Earth Asteroids(NEA) explorations, to investigate the current state of basic technologies that can be extended to explore interstellar objects in a velocity of ~ 6AU/year. One of the technologies that needs to be developed for interstellar object exploration is a spacecraft propulsion method such as solar sail, which can catch up with the fast speed of interstellar objects. If this kind of propulsion becomes practical for space explorations, interstellar object explorations will mark a new era and serve as a driving force to provide evidences of cosmic life.

• SUVANNABHUMI
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• v.6 no.1
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• pp.161-191
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• 2014

The entry of the logging industry in the once heavily forested riverine middle Agusan Valley where aboriginal Manobos live meant the entry of the material practice of wage labor into this out-of-the-way place. Wage labor converted the once relatively isolated, subsistence animist Manobos into laborers of the expanding capitalist regime. A symptom of modernity, this wage labor also accompanied the coming of Visayan settlers (also loggers paid by wage) who introduced indigenous Manobos the compadrazgo social relationship. This friendly relationship across ethnic identities legitimated social ties and is a social material practice represented in recent bilingual Manobo possession rituals where the Visayan spirit is incarnated along with Manobo spirits. To understand the idea behind spirit embodiment, I explore Manobo ritual as mimesis or poeisis. This representation is shaped by concrete material realities as much as these realities, in turn, are reconfigured by ritual practice. In the older Manobo cosmology, which is based on subsistence economy and dependent on the forest and rivers, individuals have an externalized self (as manifest in the idea of twin soul), in which the inner vital principle is co-extensive with a spirit double in cosmos. Manobos imitate the perceived workings of nature in ritual so as to control them in times of illnesses. In contrast, the mimesis of the Visayan spirit is based on a different political economic set up with its attendant asymmetrical interpersonal relationship. By symbolically representing the Visayan patron as friend, Manobos are able to negotiate the predicament of their subalternity in local modernity.