Psychology, Experimental

The role of stimulus similarity as an organizing principle in immediate memory was explored in a series of experiments. Each experiment involved the presentation of a short sequence of items. The items were drawn from two distinct physical categories and arranged such that the category changed after each pair of items. Following list presentation, one item was re-presented, and the subjects tried to recall the item that had directly followed it in the list. Recall was more probable if the re-pre...

Materials Science and Engineering.

by Katherine E. Williams. , Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1990. , Includes bibliographical references (leaves 65-66).

Physics, Condensed Matter

Spin-polarized electron energy loss spectroscopy (SPEELS) has been used to investigate several paramagnetic surfaces. In this technique, a low energy beam of spin-polarized electrons from a GaAs source is directed at the surface to be studied and the spin-polarization of the emitted electrons, as well as the kinetic energy distribution, is measured via a micro-Mott polarimeter equipped with a retarding potential energy analyzer. The near-elastic-energy electrons contain information on the inelas...

Chemical engineering,Chemistry,Economics

The problem of finding the best reactor system configuration has been considered in the chemical engineering literature since the 1940's. The problem was attacked, invariably, by isolating the reactor system and maximizing an objective function which usually was the yield or some linear combination of the reactor inlet and outlet compositions. However, there are numerous cases where it is not possible to uncouple the reactor problem from the rest of the process. The reason for this is that t...

Electrical engineering,Condensation

Numerical simulation was used to analyze performance of Si$\sb{1-x}$Ge$\sb{x}$ pseudomorphic heterojunction bipolar transistors (PHBTs). Models for different material properties were developed and used in 2-D drift-diffusion-equations and 1-D hydrodynamic-equations simulation programs. N-p-N and P-n-P PHBTs were analyzed. For N-p-N PHBTs both metal- and poly-Si-emitter contacts were investigated. The figures of merit used are unity current gain frequency f$\sb{T}$ and maximum frequency of oscill...

The dataflow model of computation exposes and exploits parallelism in programs without requiring programmer annotation; however, instruction- level dataflow is too fine-grained to be efficient on general-purpose processors. A popular solution is to develop a "hybrid'' model of computation where regions of dataflow graphs are combined into sequential blocks of code. I have implemented such a system to allow the J-Machine to run Id programs, leaving exposed a high amount of parallelis...

Fine-grained parallel machines have the potential for very high speed computation. To program massively-concurrent MIMD machines, programmers need tools for managing complexity. These tools should not restrict program concurrency. Concurrent Aggregates (CA) provides multiple-access data abstraction tools, Aggregates, which can be used to implement abstractions with virtually unlimited potential for concurrency. Such tools allow programmers to modularize programs without reducing concurrency. I d...

The central thesis of this report is that human language is NP-complete. That is, the process of comprehending and producing utterances is bounded above by the class NP, and below by NP-hardness. This constructive complexity thesis has two empirical consequences. The first is to predict that a linguistic theory outside NP is unnaturally powerful. The second is to predict that a linguistic theory easier than NP-hard is descriptively inadequate. To prove the lower bound, I show that the following ...

RPE

Une approche structurale des verres du systèmes B₂S₃-Li₂S-Lil a été effectuée à l'aide de techniques susceptibles d'atteindre l'ordre local. La RMN a permis de déterminer la proportion relative des atomes de bore en coordinece 3 et 4. Des hypothèses structurales ont été formulées. Elles sont basées sur les études antérieures, résultats de RMN et sur des faits expérimentaux. Les verres ont été caractérisés par spectroscopie Raman et RPE. La conduction ...

supernode

Pour exécuter une application sur une machine parallèle, la simple étape de traduction du code source vers un code binaire exécutable par compilation et édition de liens n'est pas suffisante. Deux étapes supplémentaires sont nécessaires lors du processus de développement d'un programme parallèle : l'extraction du parallèlisme et le placement des processus. Ces étapes sont trés importantes puisqu'elles conditionnent les performances globales de la machine pour l'application co...

Computer science

This thesis identifies and provides a solution for a particular problem in natural language generation: the problem of ensuring the expressibility of a text plan. Natural language generation is the process of going from a representation of a situation to a textual expression of some relevant portion of that situation in a natural language. Generation systems must have a principled way of ensuring that the message composed by the text planner is expressible in language, that is, that there are li...

名古屋大学博士学位論文 学位の種類:工学博士 (論文) 学位授与年月日:平成2年3月8日 , 水素同位体には軽水素､重水素及びトリチウムの3種類が存在する。水素同位体は最も軽い原子の同位体であり､同位体効果に関する実験的検証及びその理論的考察に対して最も好都合な元素である。また､トリチウムはβ線を放出する放射性同位体であるため､同位体効果に加えて放射線効果の研究やこれらの効果が相乗的に作用するような新しい協力現象の解明の研究に手がかりを与える可能性も秘めている｡このような同位体効果及び放射線効果などの基礎的研究を行うには､トリチウムを軽水素や重水素と同等に取り扱うことが出来るような安全取扱い技術の確立が必要不可欠である｡しかしながら､トリチウムは他の同位体に比べその取扱いが困難であるために､トリチウムの物理的･化学的性質及び材料との相互作用などに関する基礎的データが非常に不足しており､水素同位体の同等使用の際に要求されるようなトリチウムの安全取扱い技術の開発が大きく立ち後れている｡更に､トリチウムを含む水素同位体に関連する基礎的研究は､同位体効果や放射線効果などの解明のみならず､近年エ...

名古屋大学博士学位論文 学位の種類:工学博士 (論文) 学位授与年月日:平成2年7月6日 , 界磁と電機子回路をそれぞれ独立に制御できる直流電動機は、可変速電動機として、各種産業用駆動源に広く用いられてきた｡　他方、直流電動機に比較して安価で小型軽量さらにメンテナンスフリーの特徴を持つ誘導電動機やブラシレスモータなどの交流電動機をインバータを用いて可変速制御する技術は目覚ましい発展を遂げ、従来使用されてきた直流電動機は、インバータ駆動の交流電動機に置き換えられつつある｡交流電動機に所望の運転特性を与えるには、インバータの出力電圧波形をどのように制御するかが大きな問題となり、これを実現するのがいわゆる｢PWM制御技術｣である｡　広く用いられているPWM制御法としては、三角波比較PWM制御法と瞬時値比較PWM制御法がある｡　これらの方法のPWMパタンは、電圧または電流の指令値と、キャリアの三角波または実電流とを比較し、その大小関係から間接的に決定される｡　三角波比較PWM制御法は応答速度や電圧の利用率な どにおいて十分な特性が得られないという欠点を持ち、また瞬時値比較PWM制御法では、高調...

In a famous paper Dwass [I9671 proposed a method to deal with rank order statistics, which constitutes a unifying framework to derive various distributional results. In the present paper an alternative method is presented, which allows to extend Dwass's results in several ways, viz. arbitrary endpoints, horizontal steps, and arbitrary probabilities for the three step types. Regarding these extensions the pertaining rank order statistics are extended as well to simple random walk statistics. ...

Cedar City (Utah)--Ethnic relations ; Cedar City (Utah)--Social conditions ; Emigration and immigration--Religious aspects--Church of Jesus Christ of Latter-day Saints; Ethnicity--Utah--Cedar City

Electronic reproduction , v, 171 leaves ; 29 cm.

Mormon women ; Mothers--Utah

Electronic reproduction; , v, 121 leaves ; 29 cm.

Brain and Cognitive Sciences

by Karin J. Stromswold. , Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 1990. , Title as it appears in the M.I.T. Graduate List: The acquisition ofverbal categories. , Includes bibliographical references (p. 267-276).

Fields of Research::440000 Philosophy and Religion::440200 Religion and Religious Traditions::440204 Christian theology (incl. Biblical studies and Church history)

The Seventh-day Adventist Church, incorporated in the United States in 1863, was driven by the belief that it was God's 'remnant church' with the work of warning the world of the imminent return of Christ. When that mission was finished the second coming would occur. In 1886 following a visit by an elderly layman, John I Tay, the whole population of Pitcairn Island desired to join the SDA church. As a result in 1890 Adventist mission work began in the South Pacific Islands. By 1895 m...

Dunne, John S., Lonergan, Bernard J. F. Conversion. Theology

Thesis (S.T.L.)--Catholic University of America, 1990. , Includes bibliographical references (leaves 118-120).

Assemblage (Art) Assemblage (Art) Sculpture Sculpture

Thesis (M.F.A.)--Rochester Institute of Technology, 1990. , Typescript.

Literature, Modern

A comparison of Don Quijote de la Mancha by Miguel de Cervantes and La vida es sueno by Calderon de la Barca highlights a long tradition of social, religious, and political themes which preoccupied early 17th century Spain. Although one is a novel and the other a play, both works represent in their respective protagonists a gradual awareness, understanding and maturation of the human will in its quest to find meaning and freedom in life. Though one is replete with theological implications, both ...

Chemistry, Inorganic

Zinc(II), copper(II), and copper(I) complexes of the pentadentate ligand, ((5-MeimidH)$\sb2$DAP) were prepared and studied as their (BF$\sb4$)$\sp-$ salts. The divalent compounds, (M$\sp{\rm II}$((5-MeimidH)$\sb2$DAP)) (BF$\sb4$)$\sb2$ (M = Zn, Cu), were found to have intermediate geometries between idealized trigonal bipyramidal and square pyramidal structures by x-ray crystallography. It is assumed that (Cu$\sp{\rm I}$((5-MeimidH)$\sb2$DAP)) (BF$\sb4$) is also pentacoordinate as is its parent ...

Computer animation. Real-time data processing.

Thesis (M.F.A.)--Rochester Institute of Technology, 1990. , Includes bibliographical references (leaf 51).

Géométrie

Dans la première partie de la thèse, nous étudions les projections<br />orthogonales d&#39;un couple de demi-surfaces régulières qui<br />se coupent transversalement le long<br />d&#39;une courbe. Nous prenons comme modèle la variété $X=\{ (x,0,z): x\ge<br />0\}\cup \{ (0,y,z): y\ge 0\}$ et classifions les germes d&#39; applications $R^3,0\to<br />R^2,0$ sous l&#39;action des germes de difféomorphismes $R^3,0\to<br />R^3,0$ qui préservent la variété $X$, et calquer difféomorphisme de<br />$R^2,0...

Educational psychology,Womens studies,Minority &amp; ethnic groups,Sociology

The purpose of this study was (a) to examine how participants define themselves-particpants were children of survivors of the 1915 genocide by the Ottoman Turk, and (b) to examine the effects of values clarification methodology on their self-concept. This was a two-part study which consisted of interviews with four participants in Part 1, and an educational intervention in Part 2 which consisted of values clarification workshops involving 16 participants. Data from the interviews in Part 1 were ...

Mechanical Engineering

by Karen I. Palmer. , Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990. , Includes bibliographical references (p. 203-204).

Political science,Black history,Minority &amp; ethnic groups,Sociology

This study is an examination of the social basis of the Chicago Urban League&#39;s politics from its origins to the eve of World War II. The League is an interracial organization with a black professional staff serving a black clientele. It sought to mitigate against the hardships caused by the dislocations of internal migration and settlement of black Southerners. While it is hard to argue against the ministration of black material needs, the process of coordination implied a socialization that...

Cultural anthropology,Minority &amp; ethnic groups,Sociology,Political science

This dissertation examines Soviet theoretical and methodological perspectives on ethnicity; the impact of political and economic policies on the study of ethnicity in the Soviet Union; and the impact of these policies on Soviet nationalities. In order to ground the theoretical discussions of ethnicity, I examine nationalities policy among two ethnic groups: the Chukchi and Asiatic Eskimo of the Soviet Far North. The degree to which these people have been able to retain &quot;traditional&quot; fo...

Health care,Nursing,Labor relations

The primary purpose of this study was to determine if a relationship exists between the frequency that nurses and physicians believe they practice collaboratively and the frequency that nurses report job stress related to variables surrounding conflict with physicians. The study also compared nurse and physician responses to questions dealing with acceptance of a definition of collaborative practice, satisfaction with the degree of collaboration that is present in the test facility, and the sign...

English literature,Religious history,European history

This dissertation examines the non-literary and non-aesthetic reasons underlying the bias in favor of realism in the formation of the traditional literary canon of nineteenth-century British fiction. Since English literature first became a recognized academic discipline in Great Britain in the 1870s and &#39;80s, the study of fiction has been (with few exceptions) a study of realistic fiction. College survey courses in the period usually teach W. M. Thackeray through Thomas Hardy, but almost nev...

Archaeology

One of the challenges facing anthropological archaeology is to provide insights into the social, economic, and political workings of non-stratified societies in prehistory through the study of material culture. The material culture associated with these societies is seen by many archaeologists as conservative, responding primarily to functional requirements or to environmental changes. From a social perspective, however, both innovation and the absence of change in material culture must be expli...

Archaeology

Social processes of production which articulate with hunter-gatherer mobility are systematically examined. Mobility is particularly crucial in the context of egalitarian social relations. Hunter-gatherers determine mobility and constitute space by manipulating production to create social relations. Production processes that are organized to promote economic interdependence, equity, and cooperative labor limit mobility and lead to situations in which autonomy is contested. A methodology is develo...

Higher education,Womens studies

The purpose of this study is two fold. First, it provides rich descriptive information on how seven women in the position of college president define and construct their work and secondly, it gathers information regarding their perceptions of the power of the presidency. This study incorporates a feminist paradigm throughout the research process. The research study is a collection of indepth interviews with seven female college presidents in New England. The sample was purposeful rather than ran...

Chromaffin cells. Cholecystokinin. Gastrin. Enterochromaffin-like Cells. Cholecystokinin. Gastrins.

Thesis (doctoral)--Lund University, 1997. , Added t.p. with thesis statement inserted.

Chromaffin cells. Cholecystokinin. Gastrin. Enterochromaffin-like Cells. Cholecystokinin. Gastrins.

Thesis (doctoral)--Lund University, 1997. , Added t.p. with thesis statement inserted.

Julia Clarinda Paiva Cohen

Bandas de nuvens convectivas formam-se na costa norte-nordeste da America do Sul. Algumas destas bandas movem-se continente adentro como uma linha de instabilidade (LI). As LIs sem propagacao sao denominadas LI Costeira (LIC)e as Lis com propagacao sao identificadas por LIP. Ha duas categorias de LIPs: (a)com deslocamento horizontal entre 170 e 400 km a partir da costa (LIP1)e (b)com penetracao horizontal alem de 400 km (LIP2). a maxima frequencia das LIs ocorre entre abril e agosto. A velocidad...

Kloepper-Sams, Pamela J.

Thesis (Ph. D.)--Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988. , &quot;February 1989.&quot; Bibliography: p. 207-223.

Furman, Tanya Helen.

Thesis (Ph. D.)--Massachusetts Institute of Technology and Woods Hole Oceanographic Institution. , Bibliography: p. 336-353.