무기재료공학과의 현황과 개선 방안

황규홍,Hwang, Gyu-Hong 한국대학교육협의회 1989 大學敎育 Vol.41 No.-

$Al_2O_3-ZrO_2$ 복합체의 강도 및 열충격 저항의 향상에 관한 연구

황규홍,배원태,최명덕,오기동,김경운,김환,Hwang, K.H.,Bae, W.T.,Choi, M.D.,Oh, K.D.,Kim, K.U.,Kim, H. 한국세라믹학회 1988 한국세라믹학회지 Vol.25 No.3

$Y_2O_3$가 $thickapprox$1mol.% 고용된 정방정 지르코니아를 알루미나에 20vol.% 섞어 체조립에 의해 과립으로 만든 다음 여기에 알루미나에 단사정 지르코니아를 10 ~30 vol.%섞어 만든 과립을 15~30vol.%가 되도록 과립형태로 분산시켜 성형 및 소결함으로써 단사정 및 정방정 지르코니아의 분산영역이 서로 다른 불균질 조직의 $Al_2O_3-ZrO_2$복합체를 제조하여 강도 및 열충격 거동을 관찰하였다. 이러한 불균질 조직의 $Al_2O_3-ZrO_2$ 복합체는 분산 agglomerate 내의 낮은 소결밀도에 의한 기공의 존재, 단사정상에 의한 미세균열, 또 이에 따른 주위에의 압축응력 등이 복합적으로 작용하여 향상된 열충격 거동을 보여 주었다. The strength and thermal shock resistance of $Al_2O_3-ZrO_2$ composites have been studied. The tetragonal $ZrO_2$ powder containing 1 mol.% $Y_2O_3$ and monoclinic $ZrO_2$ powder were prepared by coprecipitation method and subsequently mixed with $Al_2O_3$ powder and granulated by sieving. Duplex composites were prepared by dry mixing matrix agglomerate with 15 to 30 vol.% of dispersion agglomerate, followed by pressing and sintering at 1$600^{\circ}C$ for1 hr. These $Al_2O_3-ZrO_2$ 2 composites having heterogeneous structure showed improved thermal shock behaviors because of the microcracking and pores in dispersed granules, and compressive stresses around dispersed granules resulting from $ZrO_2$ transformation.

중소기업 물류설비 시스템 합리화 사례

황규홍,Hwang, Gyu-Hong 한국물류협회 2005 물류혁신 컨퍼런스 Vol.13 No.2

이중조직을 갖는 Y-TZP/Y-TZP-$Al_2O_3$ 복합체의 열충격 거동

황규홍,김의훈,김환,Hwang, K.H.,Kim, E.H.,Kim, Hwan 한국세라믹학회 1992 한국세라믹학회지 Vol.29 No.4

Duplex composites such as Y-TZP/Y-TZP-20 wt.% Al2O3 and Y-TZP/Y-TZP- 40 wt.% Al2O3 were made by mixing the sieve-shaked granules followed by isostatic pressing and sintering at 150$0^{\circ}C$ for 1 hour. So Y-TZP became matrix region and Y-TZP-20 wt.% Al2O3 or Y-TZP-40 wt.% Al2O3 became dispersed regions. In these composites, propagating cracks due to thermal shock always run into the dispersed region because these regions act as compressive zone due to low thermal expansion than matrix region. So duplexes having dispersed regions of Y-TZP-40 wt.% Al2O3 showed higher retained strength after thermal shock than matrix only composites because crack propagations were stopped more or less in the dispersed region. But when crack propagations were much more easy than matrix like Y-TZP-20 wt.% Al2O3 region, retained strength was decreased than the matrix only composites despite of the low initial strength.

Iconicity in English Lexical Category Phrases and Sentential Complementation from a Generative Perspective

Kyu-Hong Hwang(황규홍) 한국생성문법학회 2006 생성문법연구 Vol.16 No.3

  The generative view of autonomy of syntax has been criticized by most cognitive-functional grammarians and claimed to be incompatible with or unable to account for iconicity that exits in natural human languages. Given this, this paper attempts to explain some iconic aspects in English syntax from a generative perspective in an effort to argue against this cognitive-functional criticism. After examining "structure-concept iconicity" in lexical category phrases and sentential complementation in Newmeyer"s (1992, 1998) sense, I propose the following generative principles of iconicity, embellishing Hwang"s (2005) idea: (ⅰ) when a head is modified by multiple adjuncts, the fewer maximal projections of the head there are between the head and the adjunct, the closer the semantic relation between them is; (ⅱ) when a verb takes minimal pair/set clausal complements, the fewer and morphologically poorer functional heads(C and T) there are between the matrix verb and its clausal complement, the closer the semantic relation between them is. I then claim that Haiman"s (1983, 1985, 1994)"s iconicity of distance, a sub-principle of structure-concept iconicity, is compatible with generative grammar, to a large extent, in that it is well represented structurally in generative grammar outlined in Chomsky (1995, 2001, 2005): the semantically closer the two syntactic objects are, the more local their syntactic relation is in the light of hierarchical structure.

A Usage-based Paradigmatic Construction of Over

Cheng Lin,황규홍(Kyu-Hong Hwang) 한국영미어문학회 2021 영미어문학 Vol.- No.141

By virtue of categorization and prototype theories, cognitive semanticists have proposed different models for the polysemy of over since the 1980s. However, the previous studies are problematic in both theory and method. To improve them, this paper argues for usage-based research to construct the polysemy of over in the paradigmatic dimension, following Lin and Hwang’s (2021) analysis of the syntagmatic construction of over. Based on Saeed’s (2016) contextual distinction between vagueness and ambiguity, it proposes an ambiguity analysis, where the fuzzy boundary of two related senses of a lexical polysemy can be interpreted in terms of ambiguity. Drawing on usage-based lexico-grammatical evidence generalized from BNC data, this study sorts out six basic level senses/usages of over. Then, a comparative analysis is made between “above-across” and “covering” usages, of which the result shows that “above-across” over is more typical than “covering” over from the usage-based perspective. What’s more, it also supports a possible connection between the two usages, since “covering” over resembles the “horizontally resting on” association of “above-across” over in both form and meaning.

The Structure of Causative Verb Complements in English

Hwang Kyu-Hong(황규홍) 새한영어영문학회 2006 새한영어영문학 Vol.48 No.3

Given that little attention has been paid to the syntactic aspects of Causative Verb Complements (CVCs) in English, this paper aims to examine various syntactic phenomena of such CVCs from a generative perspective. In particular, it lays focus on their constituency, category, and case valuation of their DP subjects. It has been claimed that the CVC of [DP, VP] is a single unit and the DP is the subject of the CVC. Supporting evidence for this claim comes from many syntactic facts: coordination facts, binding phenomena, the behaviors of subject-oriented idioms and adjuncts, the occurrence of expletives, facts about the floating emphatic reflexive, not-initial DPs, and alone-final DPs. After arguing against previous CP and VP analyses of the CVC, I have proposed that CVCs are clausal constituents with the category of TP whose head T is defective, laking ∮ -complete in the sense of minimalist syntax. With respect to the case valuation of the CVC subject, it has been stressed that the overt subject is an active Goal but cannot be valued by the Tdef of the CVC under Chomsky's (1995, 2000, 2001, 2005) Agree Theory. Then, the subject has been said to agree with the matrix light verb v and receive an accusative case value, as in typical ECM constructions.

A Labeling Algorithm Approach to Infinitive Complements in English

Hwang, Kyu-Hong(황규홍) 새한영어영문학회 2016 새한영어영문학 Vol.58 No.1

This paper examines the structure of infinitive complements in English and aims to show how they are derived in accordance with Chomsky’s (2013, 2014) Labeling Algorithm. It first demonstrates that at the stage of merging the embedded subject with its TP, the infinitive complement of raising predicates is labeled as TP, while that of control predicates is labeled as 〈ϕ, ϕ〉. As to infinitive complements of perception and causative verbs, it is said based on empirical evidence that they are TPs and as in the ECM construction, their subjects agree with the matrix V with an agreement feature inherited from the matrix v. As a result, the derived structure is labeled as 〈ϕ, ϕ〉 at the point of merging the embedded subject and the matrix VP, the embedded T being defective.

미국 메인 스트리트 프로그램의 전문가 인증 프로그램 고찰

황규홍(Hwang, kyu-Hong),고지영(Ko, Ji-Yeong) 한국주거학회 2017 한국주거학회 학술대회논문집 Vol.29 No.1

The urban regeneration educational programs needs to be systematically developed considering the expertise, locality, and inclusiveness. However, the existing the urban regeneration educational programs in Korea has the limitations in improving the quality of experts. The purpose of this study is to analyze the characteristics of the expert certification program of the "Main Street America" in the United States and to find out how to apply it the domestic expert certification program. The data for the analysis was collected through literature review using the academic databases. The collected data were analyzed on the basis of the operating organization system, a program operation principle, and the expert certification system characteristics. The implication of a expert certification program of "Main Street America" were the diversity of the educational program contents and a educational method through the urban regeneration projects, the organizational operating system, and the four-point approach(organization, promotion, design and economic restructuring). This study gives implications of the establishment for the national urban regeneration expert certification program.

영어 문장형식에 대한 논항구조적 접근

황규홍(Hwang, Kyu-Hong) 새한영어영문학회 2016 새한영어영문학 Vol.58 No.4

In 2008’s revised educational curriculum for foreign languages, Quirk et al.’s(1985) seven patterns of English sentences are introduced as essential sentence forms. However, it seems that most Korean English learners and educators are not familiar with the seven-pattern system, still sticking to Onions’(1904) traditional five-pattern system and that there exist some theoretical and empirical problems with both of the systems. Given this, this paper examines the problems of the five- and seven-pattern sentence analyses and advances these proposals based on the matrix verb’s argument structure and some syntactic evidence: (i) the conventional SVOC pattern, where C is a small clause or an NP followed by the infinitive without to, should be analyzed as an SVO pattern; (ii) sentences containing a verb followed by [NP + to-infinitive] are an SVO pattern when the verb is a two-place predicate but an SVOO pattern when the verb is a three place-predicate; (iii) in the ECMed sentences, the postverbal NP, the subject of the embedded clause, raises to the matrix clause and serves as its object; (iv) obligatory adverbials should be taken into account and such patterns of SVA and SVOA need to be recognized and taught properly.