2,265,287 research outputs found
Min-up/Min-down Polytopes
No full textIn power generation and other production settings, technological constraints force restrictions on the number of time periods that a machine must stay up once activated, and stay down once deactivated. We characterize the polyhedral structure of a model representing these restrictions. We also describe a cutting-plane method for solving integer programs involving such min-up and min-down times for machines. Finally, we demonstrate how the polytope of our study generalizes the well-known cross polytope (i.e., generalized octahedron)
Energy Crop Supply in France: A Min-Max Regret Approach
No full textThis paper attempts to estimate energy crop supply using an LP model comprising hundreds of representative farms of the arable cropping sector in France. In order to enhance the predictive ability of such a model and to provide an analytical tool useful to policy makers, interval linear programming (ILP) is used to formalise bounded rationality conditions. In the presence of uncertainty related to yields and prices it is assumed that the farmer minimises the distance from optimality once uncertainty resolves introducing an alternative criterion to the classic profit maximisation rationale. Model validation based on observed activity levels suggests that about 40% of the farms adopt the min-max regret criterion. Then energy crop supply curves, generated by the min-max regret model, are proved to be upward sloped alike classic LP supply curves.interval linear programming, min-max regret, energy crops, France, Crop Production/Industries, Resource /Energy Economics and Policy, C61, D81, Q18,
Min-Max Dom-Saturation Number of a Tree
No full textIn this paper we present a dynamic programming algorithm for determining the min-max domsaturation number of a tree
Performance of a small prototype of the CMS barrel muon chambers
No full textA small prototype of the CMS Barrel Muon Chambers has been exposed to a muon beam at CERN during 1995 and 1996 to study the detector performance in various working conditions, determined by the high voltage settings, the track incidence angle and the magnetic field intensity and direction. The effect of air contamination in the gas has also been studied. © 1998 Elsevier Science B.V. All rights reserved
The 3-min Test Does not Provide a Valid Measure of Critical Power Using the SRM Isokinetic Mode.
No full textRecent datas suggest that the mean power over the final 30 s of a 3-min all-out test is equivalent to Critical Power (CP) using the linear ergometer mode. The purpose of the present study was to identify whether this is also true using an "isokinetic mode". 13 cyclists performed: 1) a ramp test; 2) three 3-min all-out trials to establish End Power (EP) and work done above EP (WEP); and 3) 3 constant work rate trials to determine CP and the work done above CP (W') using the work-time (=CP1/W'1) and 1/time (=CP2/W'2) models. Coefficient of variation in EP was 4.45% between trials 1 and 2, and 4.29% between trials 2 and 3. Limits of Agreement for trials 1-2 and trials 2-3 were -2±38 W. Significant differences were observed between EP and CP1 (+37 W, P<0.001), between WEP and W'1(-6.2 kJ, P=0.001), between EP and CP2 (+31 W, P<0.001) and between WEP and W'2 (-4.2 kJ, P=0.006). Average SEE values for EP-CP1 and EP-CP2 of 7.1% and 6.6% respectively were identified. Data suggest that using an isokinetic mode 3-min all-out test, while yielding a reliable measure of EP, does not provide a valid measure of CP
Functions of autoreception: Karl Ove Knausgård as author-critic and rewriter
No full textKarl Ove Knausgård made his entry into the literary field as a critic in the 1990s, and he has
since 1998 made his mark as a novelist and essayist. The six-volume autobiographical work
Min kamp (2009-2011) is in essence about what it means for him to be an author. This thesis
investigates Knausgård’s strategies as a critic, essayist, and as the author of Min kamp to
position himself and his poetics within the literary field and a literary tradition. Specifically,
it examines the functions of autoreception, i.e. self-criticism, implicit in Knausgård’s role as
an author-critic, an author who writes literary criticism, and as a rewriter, an author who
rewrites his own texts and the context and poetic intentions of his previous texts. Thus, this
thesis aims to answer the question what are the functions of criticism and of rewriting for Karl Ove
Knausgård as an author?
Part I outlines a new framework of autoreception devised for examining the functions of
criticism and rewriting. The proposed common denominator is that both function to
establish, position, and validate an author-image. Ultimately, a new understanding of the
narration in Min kamp as autoreceptive is offered. Part II examines a largely unexplored area
of Knausgård’s work, namely the strategies of Knausgård as a critic prior to publishing his
first novel, and how Knausgård rewrites himself during this period in Min kamp. Part III
focuses on Knausgård’s rewriting of the period between writing his second novel and up
until he begins writing Min kamp. It investigates the strategic functions of the narrative
structure, the functions of the essayistic and critical passages, and the functions of the
distance and unity between past and present author-images that Knausgård creates in his
rewriting.
This thesis thus aims to contribute to the scholarship regarding Karl Ove Knausgård by
conducting an author-study that examines the relationship between criticism and poetics. In
addition, it aims to contribute to a broader field of research by offering a theoretical and
methodological framework of autoreception, which works across the boundaries of critical,
essayistic, and literary texts
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
General fuzzy min-max neural network for clustering and classification
No full textThis paper describes a general fuzzy min-max (GFMM) neural network which is a generalization and extension of the fuzzy min-max clustering and classification algorithms of Simpson (1992, 1993). The GFMM method combines supervised and unsupervised learning in a single training algorithm. The fusion of clustering and classification resulted in an algorithm that can be used as pure clustering, pure classification, or hybrid clustering classification. It exhibits a property of finding decision boundaries between classes while clustering patterns that cannot be said to belong to any of existing classes. Similarly to the original algorithms, the hyperbox fuzzy sets are used as a representation of clusters and classes. Learning is usually completed in a few passes and consists of placing and adjusting the hyperboxes in the pattern space; this is an expansion-contraction process. The classification results can be crisp or fuzzy. New data can be included without the need for retraining. While retaining all the interesting features of the original algorithms, a number of modifications to their definition have been made in order to accommodate fuzzy input patterns in the form of lower and upper bounds, combine the supervised and unsupervised learning, and improve the effectiveness of operations. A detailed account of the GFMM neural network, its comparison with the Simpson's fuzzy min-max neural networks, a set of examples, and an application to the leakage detection and identification in water distribution systems are given
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Min-Jeong Lee
No full text학위논문(석사)--아주대학교 일반대학원 :의학과,2014. 8“신대체요법을 언제 시작해야 하는가?”란 물음에 답하는 것은 어려운 일이다. 신대체요법이 임박한 말기신장질환 환자에서 언제 투석을 시작할지에 대한 결정을 돕기 위하여, 본 연구에서는 한국 3차 의료기관에서 혈액투석 시작 시점에서의 말기신장질환 환자의 임상적 특징을 분석하고자 한다. 2010년 1월부터 2012년 12월까지 처음 혈액투석을 시작한 409명의 환자를 후향적으로 분석하였다. 말기신부전의 가장 흔한 원인은 당뇨병성신증 (48.7%) 였으며, 두 번째로 흔한 원인은 조직검사로 증명된 사구체신염 (11.7%)이었다. 혈액투석 시작 시점에서의 사구체 여과율은 5.59 ~ 7.82 ml/min/1.73m2 였다 (Nankivell equation 으로 계산한 사구체 여과율 제외). 이러한 사구체 여과율은 사구체 여과율 계산 공식을 어떤 것을 사용하는가에 따라 통계학적으로 유의한 차이가 있었다 (p ≤ 0.002). 다섯 가지의 사구체 여과율 공식 중에서, Modified Cockcroft-Gault 식, MDRD 식과 CKD-EPI 식이 만성신부전 합병증과 유의한 상관관계를 보였다. 특히 Modified Cockcroft-Gault 식의 경우 변동 계수(CV; coefficient of variation)가 가장 작았으며, 이는 이 식이 본 연구의 환자들의 eGFR 값을 가장 재현성 있게 나타낸다는 것을 의미한다. 혈액투석을 시작하게 된 주된 이유는 부종 (38.4%), 요독 증세 (35.0%) 였다. 당뇨 환자는 비당뇨 환자에 비하여 더 나이가 많고, 투석 시작시 높은 사구체 여과율을 보였다. 59.2% 의 환자는 외래를 경유하여 혈액투석을 시작하였고, 40.8% 의 환자는 응급실로 내원하여 혈액투석을 시작하였다. 응급실로 내원하여 투석을 시작한 경우, 고칼륨혈증 및 대사성 산증이 외래 내원하여 시작한 환자군에 비하여 더 심한 소견을 보였다. 현재 한국에서 행해지고 있는 혈액 투석 시작 시점에서의 말기신장질환 환자들의 임상적 특징 및 혈액검사 자료 등의 자료가 향후 투석 시작 시점을 결정하는데 유용한 정보가 되길 기대한다.ABSTRACTS
LIST OF FIGURES
LIST OF TABLES
I. INTRODUCTION
II. METHODS
A. Patient selection
B. Laboratory data
C. Estimated glomerular filtration rate
D. Statistical analysis
III. RESULTS
IV. DISCUSSION
REFERENCES
FIGURES
TABLES
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