• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2006.11a
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• pp.337-340
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• 2006

Dwelling refers to a way of being that has to do with a cautious and guarded attitude. What has to be nurtured and preserved is the dweller's relationship with the fourfold of heaven and earth, divinities and mortals. This leads to the fourfold definition that mortals dwell insofar as they save the earth, receive heaven as heaven, await the divinities as divinities, and are capable of death as death. Heidegger sees the thing as the concrescence of what he calls the fourfold of earth, sky, mortals, and divinities. For Heidegger, true being means to be open to the fourfold, to tend the fourfold in its essence. C. Norberg-Schulz takes as his starting point Heidegger's notion of the thing as that in which the fourfold is assembled. The built space must be organized in a way that concrete places are created, places that are characterized by a specific genius loci. This idea refers to life in the warm seclusion of a traditional community, but is much less applicable to the functional networks and relationships that determine life in a modem society. Cacciari thinks that what is worth questioning is in particular the condition of homelessness perceived by Heidegger, and the possible consequences of this situation for architecture. The aim of this paper is to study the meaning of dwelling through Heidegger's concept of dwelling and the interpretations of C. Norberg-Schulz and M. Cacciari about it.

• Journal of Korean Society of Water and Wastewater
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• v.11 no.3
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• pp.67-78
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• 1997

The objective of study was to examine to transient response of hydraulic shock loading in activated sludge process for treatment of municipal sewage. The general experiment approach was to operate the system under steady-state(pre-shock), then to apply step changes during 24hours in fourfold hydraulic shock loading at the same organic loading. Performance was assessed in both the transient state and the new steady-state(post-shock). Three bench scale activated sludge reactors were operated to investigate the effect of fourfold hydraulic shock loading on TSS and COD removal efficiency. In activated sludge reactors operated with 13hours and 7hours of HRT, effluent quality of all reactors was not changed for few effects, and also showed no foaming and no sludge bulking. Those results are the same as sludge withdrawn reactors. The effect of fourfold hydraulic shock loading on the activated sludge reactors operated with 3hours of HRT was most severe. The effluent quality was deteriorated significantly and generate foaming in reactors. Less than 24hours after the fourfold shock loading applied, the activated sludge system seemed to attain a new steady-state condition as show by effluent.

• Journal of the Korean Mathematical Society
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• v.61 no.2
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• pp.279-291
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• 2024

In this paper, we investigate a few strategies to construct Ulrich bundles of small ranks over smooth fourfolds in ℙ⁵, with a focus on the case of special quartic fourfolds. First, we give a necessary condition for Ulrich bundles over a very general quartic fourfold in terms of the rank and the Chern classes. Second, we give an equivalent condition for Pfaffian fourfolds in every degree in terms of arithmetically Gorenstein surfaces therein. Finally, we design a computer-based experiment to look for Ulrich bundles of small rank over special quartic fourfolds via deformation theory. This experiment gives a construction of numerically Ulrich sheaf of rank 4 over a random quartic fourfold containing a del Pezzo surface of degree 5.

• Journal of Information Display
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• v.12 no.4
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• pp.191-194
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• 2011

A symmetric-viewing inverse-twisted-nematic (ITN) liquid crystal display (LCD) with alternating alignment layers was developed using a stamping-assisted rubbing (SAR) technique. A patterned layer of a fluorinated acrylate polymer was transferred onto the first rubbed vertical-alignment layer prepared on a substrate by stamping. The fluorinated acrylate polymer provided a protective layer covering the first rubbed alignment layer during the second rubbing process, which promoted the vertical alignment of the LC molecules. The LC cell in the ITN geometry with two orthogonally rubbed alignment layers showed symmetric-viewing characteristics with fourfold symmetry. The SAR technique was shown to be a mask-free alignment method of producing multidomains for symmetric-viewing LCDs.

• Journal of Korea Game Society
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• v.18 no.2
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• pp.5-14
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• 2018

Main purpose of this research is to discuss relationship between digital art works and audience by expansion of Body Schema from Maurice Merleau Ponty's viewpoint, and artistic value of digital art works also became discussed in this research, based on Heidgger's concept called 'Defamiliarization'. We found this 'Defamiliarization' became an important role of digital art works caused by interaction between arts and audience. And we also discussed audience's role as a poet, being-in-between in between the earth and the world, gods and mortals called Heidegger's 'fourfold'. As a conclusion, this unique experience compared to other works is called "A shamanic experience", as an artistic value in interactive digital art works.

• Proceedings of The Korean Society of Health Promotion Conference
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• 2001.09a
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• pp.21-25
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• 2001

. Tobacco Use and Mortality: - If things do not change, deaths due to tobacco use in the world will increase from 4 million in 1998 to 10 million in 2030 - Developed regions will experience 50% increase, while Asia will experience fourfold increase - globally, tobacco will be responsible for one in eight deaths by late 2020s. - Globally, at least one in three teen-age smokers will die prematurely as a result of smoking(omitted)

• Journal of the Korean Mathematical Society
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• v.59 no.1
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• pp.87-103
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• 2022

We construct new families of smooth Fano fourfolds with Picard rank 1 which contain open 𝔸¹-cylinders, that is, Zariski open subsets of the form Z × 𝔸¹, where Z is a quasiprojective variety. In particular, we show that every Mukai fourfold of genus 8 is cylindrical and there exists a family of cylindrical Gushel-Mukai fourfolds.

• Bulletin of the Korean Mathematical Society
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• v.60 no.2
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• pp.485-494
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• 2023

Let Y be the quintic del Pezzo 4-fold defined by the linear section of Gr(2, 5) by ℙ⁷. In this paper, we describe the locus of double lines in the Hilbert scheme of coincs in Y. As a corollary, we obtain the desigularized model of the moduli space of stable maps of degree 2 in Y. We also compute the intersection Poincaré polynomial of the stable map space.

• Journal of the Korean Vacuum Society
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• v.15 no.4
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• pp.360-366
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• 2006

We have performed density functional theory calculations for the surface structure of O/Pd(100)-p($2{\times}2$), formed by the adsorption of oxygen atoms of 0.25 ML. The oxygen atoms adsorb preferentially at the fourfold hollow site, and the calculated O-Pd bond length is $2,15{\AA}$, The first interlayer spacing ($d_{12}$) of Pd(100) expands by +0.8% due to the oxygen adsorption, which differs from the experimental value of +3.6% reported by a previous LEED study. Assuming that the LEED sample was possibly contaminated by hydrogen atoms, we also examined the effect of hydrogen impurities on the surface structure. Hydrogen atoms adsorbed on O/Pd(100)-p($2{\times}2$) are found to result in large expansions of $d_{12}$ of Pd(100). Our analysis estimates the amount of hydrogen atoms remaining on the LEED sample as -0.3 ML.

• Journal of Korea Multimedia Society
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• v.13 no.6
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• pp.875-883
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• 2010

In this paper, we present a secure biometric hashing scheme for face recognition by random fusion of global and local features. The Fourier-Mellin transform and Radon transform are adopted respectively to form specialized representation of global and local features, due to their invariance to geometric operations. The final biometric hash is securely generated by random weighting sum of both feature sets. A fourfold key is involved in our algorithm to ensure the security and privacy of biometric templates. The proposed biometric hash can be revocable and replaced by using a new key. Moreover, the attacker cannot obtain any information about the original biometric template without knowing the secret key. The experimental results confirm that our scheme has a satisfactory accuracy performance in terms of EER.