22,871 research outputs found
LWR core thermal-hydraulic analysis : assessment and comparison of the range of applicability of the codes COBRA IIIC/MIT and COBRA IV-I
No full textBased on the M.S. thesis of the first author in the M.I.T. Dept. of Nuclear Engineering, 1978.This report summarizes the result of studies concerning the range of
applicability of two subchannel codes for a variety of thermal-hydraulic
analyses. The subchannel codes used include COBRA IIIC/MIT and the
newly developed code, COBRA IV-I which is considered the benchmark
code for the purpose of this report. Hence, through the comparisons
of the two codes, the applicability of COBRA IIIC/MIT is assessed
with respect to COBRA IV-I.
A variety of LWR thermal-hydraulic analyses are examined. Results
of both codes for steady-state and transient analyses are compared.
The types of analysis include BWR bundle-wide analysis, a simulated rod
ejection and loss of flow transients for a PWR. The system parameters
were changed drastically to reach extreme coolant conditions, thereby
establishing upper limits.
In addition to these cases, both codes are compared to experimental
data including measured coolant exit temperatures in a core, interbundle
mixing for inlet flow upset cases and two-subchannel flow blockage
measurements.
The comparisons showed that, overall, COBRA IIIC/MIT predicts most
thermal-hydraulic parameters quite satisfactorily. However, the clad
temperature predictions differ from those calculated by COBRA IV-I and
appear to be in error. These incorrect predictions are caused by the
discontinuity in the heat transfer coefficient at the start of boiling.
Hence, if the heat transfer package is corrected, then COBRA IIIC/MIT
should be just as applicable as the implicit option of COBRA IV-I.Final report for research project sponsored by Long Island Lighting Company and others under the MIT Energy Laboratory Electric Utility Program
Analisis Kritis dan Pragmatis Caring Economics sebagai Paradigma baru Kajian Ekonomi
No full textThis article critically and pragmatically analyze and expose the concept and basic principles of caring economics as a new paradigm of economics as opposed to neo-liberal economics and its implications to economic education in Indonesia. The analysis and exposition based on unobtrusive research techniques, i.e. comparative content analysis and historical notes among references used here and in the context of Pancasila and UUD 1945. The implications of the study in this article are formulated into three key recommendations: (a) the need to review and operational translation of Articles 33 and 34 of the UUD 1945 (Amendment IV, 2002); (b) the need to review the curriculum, learning approaches and tools, and practices of learning economics in schools in order that caring economic becoming educational character of the national economy; and (c) the need to campaign of introduction to paradigm and practice of caring economics in the universities, both as an academic study or studies the development of teaching-learning models based on caring economics, through collaboration of higher education, school, community and local government
MODAL SOSIAL DALAM DINAMIKA PERKEMBANGAN SENTRA INDUSTRI LOGAM WARU SIDOARJO
No full textThe new institutional economics paradigm, qualitative-interpretive paradigm, case study strategy, and narrative interviewing were applied in this research in reconstructing conceptually and theoretically how the existence and roles of social capital within the context of the dynamics of SILOW (Sentra Industri Logam Waru) development since its beginning through the development of ASPILOW (Asosiasi Pengusaha Industri Logam Waru). Four distinct social capital perspectives and MBCA (Mutually Beneficial Collective Action are used as two proxies in reconstructing the existence and roles of social capital on the dynamics of SILOW development. Based on analytical reconstruction found that structurally and cognitively the existence and roles of social capital contribute significantly to the industry development of SILOW in five phases: the embryo of blacksmith center, the blacksmith center, the metal works center (SILOW), the SILOW-Synergy I, and the SILOW-Synergy II
THE MINIATURE OF SIPARTI 3-S: KSM Sibermas in the Urban Poverty Project In Kelurahan Tlogomas, Kecamatan Lowokwaru, Malang, Indonesia
No full textThe miniature presented here is sytesis of how the siparti 3-S as an approach and prctice in dealing with the community empowerment under the UPP (Urban Poverty Project) in Indonesia. The notion of Siparti 3-S as an approach was applied specifically to build and operate a KSM in a kelurahan area in the year of 2000-2001 of UPP1 second phase. The pratice of how Siparti 3-S applied through the KSM Sibermas project was inspired and motivated by the previous successful of the author’s project was inspired and motivated by the previous successful of the author’s project in executing a training program for the retrenched tertiary graduates who had lost their jobs due to the financial crisis during 1998, under the project was known as P3T- Proyek Penanggulangan Pengangguran Pekerja Terampil (Skilled Workers Unemployment Project). Utllization of waste material to produce sound economic and enviromental- friendly products was the theme of project run by KSM Sibermas. Based on the field experience of the author and members of KSM Sibermas in accomplishing the project, found that the Siparti 3-S was effective in building synergistically the three main resources, namely: human (the training participants), nature & enviroment (waste materials & garbage dump), and social-culture (the mindset and the behavior toward handling waste materials). Keyword: Siparti 3-S, KSM Sibermas, Urban Poverty Project, Indonesia
CyberIR@MIT: Knowledge for Science, Policy, Practice
No full textThis paper presents a brief introduction to CyberIR@MIT—a dynamic, interactive knowledge and networking system focused on the evolving, diverse, and complex interconnections of cyberspace and international relations. The goal is to highlight key theoretical, substantive, empirical and networking issues.
CyberIR@MIT is anchored in a multidimensional ontology. It was initially framed as an experiment during the MIT-Harvard collaboration on Explorations in Cyber International Relations (see ecir.mit.edu) to serve as a forum for quality-controlled content and materials generated throughout the research project.
The method consists of differentiating among the various facets of human activity in (i) cyberspace, (ii) international relations, and (iii) the intersection of the cyber and “real.” It includes problems created by humans and solution strategies, as well as enabling functions and capabilities, on the one hand, and impediments to behavior and associated barriers, on the other. See https://cyberir.mit.edu for functions. The value of this initiative lies in its conceptual foundations and method of knowledge representation—embedded in an interactive system for knowledge submission, with search and retrieval functions.This material is based on work supported by the MIT Political Science Department & U.S. Department of Defense. Any opinions, findings, conclusions or recommendations therein are those of the author(s) and do not necessarily reflect the views of the U.S. Department of Defense
Engineering neuromuscular tissues for bidirectional neuroprosthetic interfacing
No full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: Ph. D. in Medical Engineering and Medical Physics, Harvard-MIT Program in Health Sciences and Technology, 2020Cataloged from student-submitted PDF of thesis.Includes bibliographical references (pages 208-242).Contemporary technological approaches to address limb loss and neuromuscular dysfunction consist of synthetic, mechanical devices which lack an intimate bidirectional interface with nervous tissues. On the therapeutic front, the current amputation paradigm disrupts neuromuscular architecture, discards sensory organs and provides no anatomical or prosthetic replacement. This precludes the generation of afferent sensory feedback, which is critical for sensory integration, motor planning, peripheral and central neurological health, and myoelectric prosthesis control. Utilizing a paradigm of coevolution, I simultaneously engineer neuromuscular anatomy and bioelectronics to enable seamless, bidirectional neuroprosthetic interfacing. In this dissertation, I describe the design and preclinical validation of the regenerative agonist-antagonist myoneural interface (AMI) and myodermal interface (MI), which are reconstructive surgical models to restore musculotendinous and cutaneous sensory feedback, respectively. Then, through case-control studies, the functional outcomes of human subjects who have undergone below-knee and above-knee amputations incorporating native AMIs are compared to standard amputation controls. The effect of AMI amputation on sensorimotor neuroplasticity is investigated through anatomical and functional neuroimaging. These preclinical and clinical evaluations demonstrate the a) production of graded efferent and afferent signals, b) the maintenance of peripheral limb volume and central sensorimotor substrates, c) improvements in phantom sensation, phantom pain, and neuroprosthetic controllability, and d) decreased dependence on compensatory visuomotor circuitry. To address challenges with functional electrical stimulation (FES) of neuromusculature, employed for prosthetic feedback and control, I develop a closed-loop functional optogenetic stimulation system (FOS) for peripheral neuromuscular control. This system demonstrates greater accuracy, biomimetic orderly recruitment of fibers, and minimized fatigue during cyclic movements as compared to FES. Spanning from animal models to human implementation, this dissertation presents 1) a model to design new surgical techniques for afferent/efferent signaling, 2) characterize the physiology following clinical translation, and 3) recursively apply the lessons to the design of neural interfaces back at the bench. In summary, the results of this work steer a shift of the clinical amputation paradigm towards one that performs strategic rewiring of neuromuscular constructs to enable improved neurological health and neural interfacing.Shriya Srinivasan.Ph. D. in Medical Engineering and Medical PhysicsPh. D. in Medical Engineering and Medical Physics Harvard-MIT Program in Health Sciences and Technolog
A Computational Theory of Animation
No full textThe author of this work is supported by an IBM Fellowship. The research described herein is being conducted at the Artificial Intelligence Laboratory, a Massachusetts Institute of Technology research program.A system is proposed capable of generating narrative computer animation in response to a simple script. The major problem addressed is how to imbed into the system some of the knowledge that animators use when creating animation. Infinitely many animated films can fulfill a single script. The system is faced with the problem of how to make a good one by making decisions in very under-constrained situations. This paper is a total revision of AI Working Paper 119.MIT Artificial Intelligence Laboratory
International Business Machines Corporatio
Pembangunan Ekonomi dan Ekonomi Pembangunan: Telaah Istilah dan Orientasi dalam Konteks Studi Pembangunan
No full textThis article seeks to clarify the meaning, usage, and scope of the terms: economic development and development economics, within the context of development studies. Although there is no generally accepted in a single definition, upon this critical review it is hoped that we will employ those terms and its variants appropriately within the context of development studies.Keywords: economic development, development economics, local economic development, community economic development, economic developer, economic and development studie
MODAL SOSIAL DALAM DINAMIKA PERKEMBANGAN SENTRA INDUSTRI LOGAM WARU SIDOARJO
No full textThe new institutional economics paradigm, qualitative-interpretive paradigm, case study strategy, and narrative interviewing were applied in this research in reconstructing conceptually and theoretically how the existence and roles of social capital within the context of the dynamics of SILOW (Sentra Industri Logam Waru) development since its beginning through the development of ASPILOW (Asosiasi Pengusaha Industri Logam Waru). Four distinct social capital perspectives and MBCA (Mutually Beneficial Collective Action are used as two proxies in reconstructing the existence and roles of social capital on the dynamics of SILOW development. Based on analytical reconstruction found that structurally and cognitively the existence and roles of social capital contribute significantly to the industry development of SILOW in five phases: the embryo of blacksmith center, the blacksmith center, the metal works center (SILOW), the SILOW-Synergy I, and the SILOW-Synergy II.</jats:p
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