Appraisal of deployable dome structures under wind loading

Parke, G.A.R.,Toy, N.,Savory, E.,Abedi, K.,Chenaghlou, R. Techno-Press 1998 Wind and Structures, An International Journal (WAS Vol.1 No.4

In this paper the appraisal of a folding dome structure under the influence of wind loading is discussed. The foldable structure considered is constructed from an assembly of interconnected elements, together with a flexible membrane, all of which are initially store in a compact form and on deployment expand, like an umbrella, into a dome structure. Loading on the dome was obtained from a wind tunnel analysis of the pressure distribution over the roof of a 1:10 scale model of the structure. The critical loading obtained from the wind tunnel investigation was used, together with individual member and material tests, to form a series of numerical non-linear finite element models which were, in turn, used to investigate the forces within the structure. The numerical analysis was used to determine the critical wind loading that the structure can sustain, as well as providing a method by which to investigate the failure modes of the structure. In order to enhance the load carrying capacity of the dome it was found that both the strength and stiffness of the structural nodes needed to be enhanced and in addition, changes were necessary to substantially increase the stiffness of the individual member and caps.

항공우주 분야에서 스타트업의 등장과 그 시사점

박준우(Junwoo Parke) 항공우주시스템공학회 2018 항공우주시스템공학회 학술대회 발표집 Vol.2018 No.11

수산화아파타이트 침전의 열분해에 의한 수산화아파타이트 시멘트의 제조

박정희 ( Jung Hee Parke ),송태웅 ( Tae Woong Song ) 경남대학교 신소재연구소 2006 신소재연구 Vol.18 No.-

Field measurements of wind-induced transmission tower foundation loads

Savory, E.,Parke, G.A.R.,Disney, P.,Toy, N.,Zeinoddini, M. Techno-Press 1998 Wind and Structures, An International Journal (WAS Vol.1 No.2

This paper discusses some of the findings arising from long-term monitoring of the wind effects on a transmission tower located on an exposed site in South-West England. Site wind speeds have been measured, together with the foundation loads at the base of each of the four legs. The results show good correlation between the wind speeds and leg strains (loads) for a given wind direction, as expected, for wind speeds in excess of 10 m/s. Comparisons between the measured strains and those determined from the UK Code of Practice for lattice towers (BS8100), for the same wind speed and direction, show that the Code over-estimates most of the measured foundation loads by a moderate amount of about 14% at the higher wind speeds. This tends to confirm the validity of the Code for assessing design foundation loads. A finite element analysis model has been used to examine the dynamic behaviour of the tower and conductor system. This shows that, in the absence of the conductor, the tower alone has similar natural frequencies of approximately 2.2 Hz in the both the first (transversal) and second (longitudinal) modes, whilst for the complete system and conductor oscillations dominate, giving similar frequencies of approximately 0.1 Hz for both the first and second modes.

The <i>mre11A470T</i> mutation and homeologous interactions increase error-prone BIR

Baek, In-Joon,Parke, Courtney,Lustig, Arthur J. Elsevier 2018 Gene Vol.665 No.-

<P><B>Abstract</B></P> <P>In the absence of the RNA-templated reverse transcriptase, telomerase, the predominant means of terminal addition, arises from break-induced replication (BIR) at multiple homologous subtelomeric Y′ loci and among internal homeologous (imperfect) (polyG1-3T) tracts. These last tracts are interspersed between subtelomeric Y′ direct repeats. One major survivor class contains very short (~50 bp) terminal telomere repeats. This size is sufficient for slow growth and partial telomere functionality and cell viability. However, in cells carrying the <I>mre11A470T</I> allele, adjacent to the predicted Rad50/Mre11 junction, cells thrive at wild-type rates, with small, but reproducible, increases in telomere length. We have proposed that the increase in telomere size and growth rate are causally linked. To understand the BIR process at the telomere, we initiated studies of large-tract (<I>RAD51</I>-sensitive) homologous BIR in <I>MRE11</I> and <I>mre11A470T</I> cells in a model color assay coupled with CHEF gel analysis and marker retention. Wild-type and mutant homologous BIR rates are maintained at the same level as the rates between wild-type and mutant homeologous BIR. However, the fidelity of BIR products was severely altered in <I>mre11A470T</I> cells. We find that 95% of homologous BIR in <I>MRE11</I> cells gives rise to the expected product size, while 25% of BIR products in <I>mre11A470T</I> cells were of unpredicted size (error-prone), most of which initiated at an aberrant site. However, ~25% of homeologous <I>MRE11</I> cells and 1/7 of homeologous <I>mre11A470T</I> cells underwent error-prone BIR. This class is initiated erroneously, followed by secondary events that elongate or truncate the telomere. We conclude that error-prone BIRs are increased in homeologous recombination in wild-type and in <I>mre11A470T</I> cells. This finding may explain the bypass of senescence in telomerase-negative cells.</P>

Official Development Assistance and Women’s Rights

Byungwon Woo,Dana Parke 숙명여자대학교 아시아여성연구원 2016 Asian Women Vol.32 No.1

How does official development assistance (ODA) affect women’s rights in aid-receiving countries? We argue that ODA allows those donor countries who have more respect for women’s rights and who have the intention of spreading the norm of gender equality to successfully influence recipient countries, and thus improve women’s rights in aid-recipient countries. We argue that this is possible because aid is equipped with technical assistance, donor conditionality, and donor-recipient collaborative projects that can be tailored to address a specific policy objective and that are ripe with opportunities for transfers of technical know-how and synergistic exchanges of local and global norms. We further contend that the effect of foreign aid on the improvement of women’s rights is conditional on donors’ respect for women’s rights at home: foreign aid from countries with more equal women’s rights has a stronger positive effect than that from countries with less equal women’s rights. We illustrate the plausibility of our theoretical argument in the context of a case of aid projects in Bangladesh and use statistical analysis to test our argument more systematically. We show that aid in general, and aid from France and the Nordic countries - those with better provision of women’s rights at home among major aid donors - in particular exert positive effects on improving women’s rights in recipient countries from 1981 to 2011, after controlling for political, socio-economic, and regional factors.

Assessment of the Progressive Collapse Resistance of Double-Layer Grid Space Structures Using Implicit and Explicit Methods

F. Fu,G. A. R. Parke 한국강구조학회 2018 International Journal of Steel Structures Vol.18 No.3

A double-layer grid space structure is a conventional long span structure used where large column-free areas are required. Due to its’ large indeterminacy and the redundancy of its structural confi guration, it is normally considered in design practice, that progressive collapse will not be triggered when the loss of an individual member occurs. However, research and several prior accidents have shown that progressive collapse could occur following the loss of some critical members when the structures are subject to abnormal loading such as heavy snow. To investigate the structural behavior of this type of structure, a 3D fi nite element model of a double-layer space structure grid was built by the authors, several collapse scenarios have been investigated using an implicit method which follows the alternative path method defi ned in GSA. In addition, case studies have been made using the explicit method which is to simulate the whole process of the structural collapse. In the analysis, diff erent members failure or support collapses were studied. The response of the structure was investigated and the correspondent potential of progressive collapse was discussed in detail. Methods to mitigate the progressive collapse of this type of space structure have also been recommended.

미국삼 ( Panax quinquefolium ) 에서 분리한 뿌리썩음병균 Cylindrocarpon destructans의 후막포자 생성 및 분리 ( Production and Isolation of Chlamydospores in Cylindrocarpon destuctans Causing Root Rot of panax quinquefolium )

조대휘,유연현,오승환,Jennifer L. Parke 고려인삼학회 1998 Journal of Ginseng Research Vol.22 No.4

퍼지 관계 합성을 이용한 한국어 명사간에 유사 관계 구축

정석경(seokKyung Chung),박영자(YoungJa Parke),김선호(SeonHo Kim),윤준태(JunTae Yoon),민경찬(KyungChan Min),송만석(ManSuk Song) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.1B

유사한 개념을 갖는 단어들이 서로 묶여 있는 시소러스는 자연어 처리 전반에 걸쳐 사용되는 중요한 지식원이다. 본 논문에서는 말뭉치에서 나타나는 서술어-논항 구조를 이용해 자동적으로 명사를 분류함으로써 이와 같은 지식원을 구축하는 예를 보인다. 명사의 속성은 부분 파서를 이용해 말뭉치에서 자동적으로 추출된 서술어-목적어 관계를 이용하여 표현되며 명사간의 유사도는 COS 척도(두 명사 벡터가 이루는 각도의 COS 값)로 계산된다. 일반적으로 유사 척도는 이행성(transitivity)을 만족하지 않는 특징이 있다. 본 논문에서는 먼저 반사성(reflexivity)과 대칭성(symmetry)을 만족하는 COS 척도를 1차 퍼지 관계로 하여, 분류하고자 하는 명사 집합에 정의한다. 퍼지 관계의 합성을 이용해 이 1차 퍼지 관계의 이행적 폐쇄(transitive closure)를 계산함으로써 주어진 명사 집합에 대한 유사 관계를 구축한다. 실험은 한국어 명사 80개를 대상으로 하였으며 결과는 의미적으로 유사한 단어끼리 묶였다기보다 문법 관계를 반영하는 분류가 되었다.

Dilemmas of Korean Athletes With a Spinal Cord Injury to Participate in Sports: A Survey Based on the ICF Core Set for Spinal Cord Injury

Je Shik Nam,Ko Eun Lee,Ah Young Jun,Chong Suck Parke,Hyun Young Kim,You Hyeon Chae 대한재활의학회 2016 Annals of Rehabilitation Medicine Vol.40 No.5

Objective To explore the experiences of athletes with spinal cord injury (SCI) in Korea with respect to dilemmas of participating in sports with regards to the facilitators and barriers, using the International Classification of Functioning, Disability and Health (ICF).Methods The facilitators and barriers to sports participation of individuals with SCI were examined using 112 ICF categories. A questionnaire in dichotomous scale was answered, which covered the subjects ‘Body functions’, ‘Body structures’, ‘Activity and participation’ and ‘Environmental factors’. Data analysis included the use of descriptive statistics to examine the frequency and magnitude of reported issues. Results Sixty-two community-dwelling participants were recruited. Frequently addressed barriers in ‘Body functions’ were mobility related problems such as muscle and joint problems, bladder and bowel functions, pressure ulcers, and pain. In ‘Activity and participation’, most frequently reported were mobility and self-care problems. Highly addressed barriers in ‘Environmental factors’ were sports facilities, financial cost, transportation problems and lack of information. Relationships such as peer, family and friends were the most important facilitators. Conclusion Numerous barriers still exist for SCI survivors to participate in sports, especially in the area of health care needs and environmental factors. Our results support the need for a multidisciplinary approach to promote sports participation.