4,107 research outputs found
ko-ax photo [Selected by Tate Curator of Photography, Simon Baker]
No full textko-ax photo was an open submission competition selected by Simon Baker (Curator of Photography, Tate), Sue Steward (Photography critic, Telegraph, Observer, Guardian, BBC) and John Gill (Curator Brighton Photo Biennial and Founder Photoworks). The 10 artists selected all presented fascinating artworks that conceal narratives and ask questions of the viewer. Questions of beauty, family, decay and fantasy were all explored across over 50 works.</p
The people behind the papers – Jason Ko and Daniel Lobo
No full textPlanarians grow when they are fed and shrink during periods of starvation. However, it is unclear how they maintain appropriate body proportions as their size changes. A new paper in Development investigates the differences between growth and shrinkage dynamics and builds a mathematical model to explore the mechanisms underpinning these two processes. To learn more about the story behind the paper, we caught up with first author, Jason Ko, and corresponding author, Daniel Lobo, Associate Professor at the University of Maryland.https://doi.org/10.1242/dev.20298
Organizational Learning and Marketing Capability Development: A Study of Charity Retailing Operation of British Social Enterprises
No full textSocial enterprise is a hybrid form of profit- and social benefit-seeking organization whereby traditional nonprofit organizations pursue both their social mission and business opportunities. To embrace this new strategic direction shift, the nonprofit organizations need to develop new competences that will enable them to respond to the changes in the business model. The article investigates the learning mechanisms through which social enterprises develop a marketing capability to deploy their resources in the marketplace as the drivers of competitive advantage in their commercial practice. We study eight cases of UK-based charity retailers, in order to address the role of knowledge accumulation, articulation and codification process in the evolution of marketing capability development. We identify, amongst other things that the critical process of organizational learning for social enterprise is to transfer the experience into organization specific knowledge under the social aspects of constraints
Unsteady-state blowdown modeling of multiphase non-equilibrium state mixtures in pressure vessels
No full text학위논문 (석사)-- 서울대학교 대학원 : 조선해양공학과, 2017. 2. 임영섭.본 연구는 기체로 가득 찬 압력 용기의 액체 발생하는 경우에 한 감압 혹은 블로우다운 현상을 예측하는 수치 모델을 개발하였다. 화재 발생과 같이 급격한 열 유입이 없는 경우, 빠른 감압 시 용기 내부 유체의 급격한 온도하락이 벽면 온도 하락으로 이어진다. 특히, 감압 중 액체가 발생하는 경우 상 간 비 평형 현상이 발생하여 액체와 맞닿은 벽면의 온도의 변화가 크게 발생한다. 이때 용기 벽면 저온 취성 문제가 발생하여 파괴(rupture)를 유발할 수 있어 저온 해석이 설계 반영에 필요한 실정이다. 만약 정적 평형 가정 시 온도가 지나치게 높게 예측이 되어 정밀한 해석이 불가능하므로 감압 중 시간 변화에 따른 비 평형 현상을 예측하여야 하므로 다음과 같은 열역학적 현상을 고려하였다. 용기 내부 열유입을 반영한 현실적인 팽창 경로 반영하였으며, 액체와 기체의 온도가 다른 비 평형 가정을 위해 에너지 및 물질 수지를 고려하였다. 용기 내부는 강제 류, 용기 외부는 자연 류를 고려하였고 용기 벽면에는 비정상 열전도를 적용하여 현실적인 열 전달을 고려하였다. 밸브를 통과하는 배출유량 산정을 위해 밸브 후단에서 액체가 발생하는 경우도 고려하였다. 액체 발생시 벽면의 온도가 급격히 하락하는 현상을 반영하기 위하여 비정상 전도를 고려하였다. 물성 계산은 EOS를 이용하여 계산하였으며 상평형 계산을 위해 깁스 에너지 최소화를 고려한 플래시 계산, 헬름홀츠 에너지를 고려한 임계점 계산을 수행하였다. 최종적으로 감압 단계 간 물질 이동 단계를 가정하여 다상 발생 경우에 한 전체 알고리즘을 제시하였다. 본 연구 모델은 시간 변화에 따른 압력, 유체의 온도, 각 상과 맞닿은 벽면의 온도, 배출유량을 예측하였다. 해석 결과를 3가지 경우에 해 문헌의 블로우다운 실험 결과와 비교하였으며 기체 온도, 기체 접촉 벽면, 압력 변화에 한 높은 일치를 보였고, 액체 온도, 액체 접촉 벽면에 해 작은 오차를 보이는 경향성을 가지는 결과를 보였다. 또, 선행연구의 수치 모델의 결과 및 상용 프로그램의 검증 결과와도 함께 비교하였다.The model in this study developed a numerical model that predicts the depressurization or blowdown phenomena applicable to the formation of liquid in the pressure vessel initially filled with gas. Without a large amount of heat input from the outside, such as a fire, a sudden drop in the fluid inside the pressure vessel during rapid depressurization leads to a drop in wall temperature. Particularly, when a liquid is condensed during the depressurization, a non-equilibrium phenomenon between phases occurs, and a temperature change of a wall contacting the liquid largely occurs. This drop leads to low-temperature brittleness problem on the vessel wall and rupture may occur, so that low temperature analysis is necessary to reflect the design. With the steady-state equilibrium assumption, the temperature is predicted to be excessively high and precise analysis is impossible. Assuming steady-state equilibrium during the depressurization, high fluid temperature is predicted. Therefore, the following thermodynamic phenomenon was considered to predict the non-equilibrium phenomenon during the depressurization. The realistic depressurization path was reflected by the heat input into the vessel, and energy and mass balance were considered for non-equilibrium phenomena between phases. Forced convection inside the vessel and natural convection outside the vessel were taken into account and realistic heat transfer was considered by applying unsteady heat conduction to the vessel wall. The calculation of the discharge rate was carried out by considering the case of two-phase at the orifice. Unsteady conduction was considered to reflect the sudden drop in the temperature of the first contact surface with the liquid. Properties were calculated by using EOS. For the phase equilibrium calculation, flash calculation with Gibbs energy minimization and critical point calculation with Helmholtz energy were performed. Finally, the entire algorithm for two-phase fluid is proposed assuming the condensed vapor/evaporated liquid transfer path between depressurization steps. This model in this study predicted the pressure, fluid temperature, inner wall temperature, discharge rate with time. The results of the analysis are compared with those of the blowdown experiments in the three cases. Vapor temperature, vapor-side inner wall temperature and pressure showed a good agreement with experimental data. Liquid temperature and liquid-side inner wall temperature showed similar tendency to experimental data. We also compared the results of the numerical model of the previous research and the verification results of the commercial program.제１장 서론 1
제１절 연구 배경 1
제１항 플레어 시스템 최적화 필요성 1
제２항 감압 및 블로우다운의 필요성 3
제３항 감압 설계 시 파괴(rupture) 고려 4
제４항 비 화재 시 감압 현상 5
제５항 블로우다운 실험 8
제1목 실험 종류 요약 8
제2목 Case 1 10
제3목 Case 2 12
제4목 Case 3 15
제２절 선행 연구 17
제１항 공개된 감압 현상 시뮬레이션 종류 17
제1목 BLOWDOWN 19
제2목 BLOWSIM 20
제3목 BLOW 22
제4목 VBsim 27
제２항 선행 연구 모델의 한계점 32
제1목 다상 감압 모델 개발 정보 부족 32
제2목 초기 액체 온도 예측 방법 개발의 필요성 35
제3목 상평형 계산 검증 필요성 37
제３항 상용 프로그램 종류와 한계점 39
제1목 gFlare 40
제2목 VessFire 40
제3목 HYSYS 41
제３절 연구 목적 42
제１항 압력 용기 내 감압 현상 시뮬레이션의 필요성 42
제２항 선행 연구의 한계점을 반영한 세부 목적 43
제２장 압력용기 내 준정상 상태 감압 현상 모델링 43
제１절 가정 44
제１항 모델의 특징 44
제２항 유체 특성 45
제1목 상 내 일치 가정 45
제2목 물성 계산 방법 45
제３항 감압 경로 선정 46
제４항 평형 및 비평형 현상 가정 47
제1목 임계점 계산 47
제2목 플래시 계산 54
제3목 상 내 평형 및 상 간 비평형 현상 가정 57
제５항 영역 분리 58
제６항 물질 수지 60
제７항 상간 flux 교환을 반영한 엔트로피 증가 반영 60
제８항 열전달 현상 61
제1목 용기 내부 기체 대류 현상 61
제2목 용기 내부 액체 비등 현상 64
제3목 용기 외부 기체 대류 현상 65
제4목 각 영역의 열전달률 65
제９항 용기 벽면 온도 예측 65
제1목 과도 전도(transient conduction) 적용 65
제2목 초기 액체 벽면 온도 예측 방법 제시 67
제１０항 유체 배출 67
제1목 유체의 팽창 부피를 이용한 배출 유량 계산 68
제2목 배출 유량 계산 68
제１１항 용기 특성 70
제２절 감압 현상 알고리즘 71
제３장 결과 74
제１절 주요 세부 계산 모듈 검토 74
제１항 임계점 계산 검토 74
제２항 상평형 곡선을 통한 플래시 계산 검토 81
제２절 전체 감압 현상 시뮬레이션 결과 검토 81
제１항 비교 실험 정리 81
제２항 Case 1 82
제３항 Case 2 87
제４항 Case 3 93
제４장 결론 97
참고 문헌 99
ABSTRACT 101Maste
Ko au te whenua, te whenua ko au – I am the land, the land is me: An autoethnographic investigation of a secondary school teacher’s experience seeking to enrich learning in outdoor education for Māori students.
No full textThis thesis is my story as an outdoor educator, as a researcher, and a co-participant reflecting on my own actions and experiences as well as those of my students. In this autoethnography I share my revelations and tensions in my role as an outdoor education teacher seeking to enrich the experiences of Māori students. Māori culture and history have largely been ignored in the outdoor education classrooms and environments of Aotearoa New Zealand. After teaching the subject for ten years I didn’t perceive that I was perpetuating the same invisibility in my own outdoor education course. Over this time a number of questions that had fermented at the back of my mind came to the fore; ‘why are so few Māori students opting to take outdoor education as a senior secondary school subject?’ and ‘how can I make the subject of outdoor education more desirable and appealing to Māori?’ A place-responsive approach incorporates and values traditional ways of learning through the notion of place and the stories attached to them. The cultural context of learning about and through place has the potential to provide learning opportunities that are relevant and meaningful to all learners but particularly Māori. Place-responsive pedagogies allow outdoor educators to create an environment where language, knowledge, culture and values are normal, valid and legitimate – contexts where Māori students can be themselves. Through this research I have found that the implementation of a place responsive approach has had significant implications for Year twelve outdoor education at Mount Maunganui College. The improvement in Māori student achievement and numbers selecting the subject have been affirming.
Ko au te whenua, te whenua ko au – I am the land, the land is m
KNOWLEDGE ACCUMULATION IN ASIAN PUBLIC ADMINISTRATION RESEARCH: A CRITICAL REVIEW
No full textGiven the growing controversy over the relevance of Anglo-Saxon style public administration to developing countries and a greater demand for more context-relevant theories of public administration in Asia, we should expect that Asian scholars achieve a certain level of knowledge growth in line with this controversy and demand. On the basis of the review of 8810 articles published in nine major international journals during 1990-2011, the author found that the number of articles on Asian public administration is very small, and there is no strong pattern of growth in this regard. In addition, there are very few studies adopting a comparative approach covering multiple Asian countries. Copyright (c) 2013 John Wiley & Sons, Ltd.N
Book-in-Common Conversation - Lisa Ko
No full textLisa Ko, author of The Leavers, will speak about her book and writing career in a virtual presentation on Tuesday, March 23 at 7 pm. Lisa Ko is the recipient of the 2016 PEN/Bellwether Prize and the 2017 Barnes and Noble Discover Great New Writers Award. The Leavers was also named best book of the year by NPR
Differentially altered social dominance- and cooperative-like behaviors in Shank2- and Shank3-mutant mice
No full textBackground: Recent progress in genomics has contributed to the identification of a large number of autism spectrum disorder (ASD) risk genes, many of which encode synaptic proteins. Our understanding of ASDs has advanced rapidly, partly owing to the development of numerous animal models. Extensive characterizations using a variety of behavioral batteries that analyze social behaviors have shown that a subset of engineered mice that model mutations in genes encoding Shanks, a family of excitatory postsynaptic scaffolding proteins, exhibit autism-like behaviors. Although these behavioral assays have been useful in identifying deficits in simple social behaviors, alterations in complex social behaviors remain largely untested. Methods: Two syndromic ASD mouse models—Shank2 constitutive knockout [KO] mice and Shank3 constitutive KO mice—were examined for alterations in social dominance and social cooperative behaviors using tube tests and automated cooperation tests. Upon naïve and salient behavioral experience, expression levels of c-Fos were analyzed as a proxy for neural activity across diverse brain areas, including the medial prefrontal cortex (mPFC) and a number of subcortical structures. Findings: As previously reported, Shank2 KO mice showed deficits in sociability, with intact social recognition memory, whereas Shank3 KO mice displayed no overt phenotypes. Strikingly, the two Shank KO mouse models exhibited diametrically opposed alterations in social dominance and cooperative behaviors. After a specific social behavioral experience, Shank mutant mice exhibited distinct changes in number of c-Fos+ neurons in the number of cortical and subcortical brain regions. Conclusions: Our results underscore the heterogeneity of social behavioral alterations in different ASD mouse models and highlight the utility of testing complex social behaviors in validating neurodevelopmental and neuropsychiatric disorder models. In addition, neural activities at distinct brain regions are likely collectively involved in eliciting complex social behaviors, which are differentially altered in ASD mouse models. © 2020, The Author(s).1
The Application of Critical Discourse Theory: A Criterion-Referenced Analysis of Reports Relating to Language Revitalisation in Australia and New Zealand
No full textThe discipline of language policy and planning (LPP) is often proposed as a viable tool for language revitalisation. However, the conventional paradigm upon which LPP is based is inadequate for such an inherently political, contentious and problematic area of social policy, and does not address the hegemonic and counter-hegemonic discourse that is at the very core of language revitalisation efforts. It is therefore argued here that LPP needs to be explicitly underpinned by critical discourse theory (CDT) if it is to be of genuine use to those involved in language revitalisation efforts, particularly to grass roots language activists. Following an introductory chapter which provides a background to the research and a rationale for it (Chapter 1), there is a critical review of selected literature on LPP and CDT, a review which ends by proposing a list of criteria which, it is argued, can be used to determine the extent to which discourse that is intended to be counter-hegemonic adheres to the principles of effective counter-hegemonic discourse as outlined in the literature on CDT (Chapter 2). In the following three chapters (Chapters 3, 4 & 5), these criteria are applied to the analysis of three recent reports that have a direct bearing on indigenous language revitalisation in Australia (Our Land Our Languages) and New Zealand (Ko Aotearoa Tēnei and Te Reo Mauriora). The first of these reports is found to adhere very closely to the criteria; the second less so; the third almost not at all. The different ways in which each of these reports has been received would tend to support the hypothesis that, other things being equal, the more closely a text of this type conforms to the criteria - that is, the more closely it is aligned to the fundamental principles of effective counter-hegemonic discourse as outlined in CDT - the more likely it is to be positively received and, therefore, to represent an effective challenge to the existing hegemony. The overall conclusion is that CDT can not only assist language activists by providing a basis for determining how successful counter-hegemonic discourse is likely to be in achieving its aims but has the potential to provide LPP with a secure theoretical foundation (Chapter 6)
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