Propeller and Vane Wheel

1980 ◽  
Vol 24 (04) ◽  
pp. 203-226 ◽  
Author(s):  
Otto Grim

The vane wheel is a freely rotating device installed on the propeller shaft behind the propeller to provide additional thrust at no increase in power. The wheel, which is larger in diameter than its companion propeller, functions as a turbine by using the otherwise-wasted propeller slipstream to generate the extra thrust. This paper describes a series of tests performed at the Hamburg Ship Model Tank to compare the efficiency of the vane wheel arrangement with other propulsion units, including a conventional propeller, contrarotating propeller, and propeller with fixed guide mechanism. The Appendix provides a mathematical analysis of the performance of the various units investigated. Preface: For many years I had the great pleasure to live near Georg Weinblum, to work with him, and to receive his advice. After he retired I became his successor at Hamburg University. In 1938 I had met Georg Weinblum for the first time; in 1952 — after his return from the United States — for the second time, and after that we met regularly. He encouraged me to write my thesis and to work as a scientist. He always took a great interest in promoting young people and in awakening their enthusiasm for science. Many young people have had this experience and think of him with gratitude. Due to the founders' intentions, the memorial lecture should deal with a subject which belongs to naval architecture and which serves its development. I have chosen the subject, Propeller and Vane Wheel, which I presented for the first time to the German Society of Naval Architecture (Schiffbautechnische Gesellschaft) in 1966. I take this opportunity to discuss the subject again, and to a different extent, because I believe that the purpose of this work is really important and can be achieved without any difficulty in the present situation, where the search for new ideas with regard to the saving of energy has become an urgent necessity.

10.31022/a008 ◽  
1982 ◽  
Author(s):  
Arthur Foote

Arthur Foote (1853–1937) was one of the first American composers to receive his entire musical training in the United States and to go on to establish an international reputation. These seven works for cello and piano include a major romantic sonata and six smaller pieces. All are newly edited from the manuscript sources and original editions, and three are published here for the first time.


2019 ◽  
Vol 5 (3) ◽  
pp. 601-613
Author(s):  
Gretchen L. Casey

Over the past few years, the rise in popularity of a genre of You- Tube videos known as “reaction videos” has resulted in controversy for various reasons. The United States District Court in Hosseinzadeh v. Klein, a landmark case for the genre, described the “reaction videos” as “a large genre of YouTube videos . . . [that] vary widely in terms of purpose, structure, and the extent to which they rely on potentially copyrighted material.” According to the Hosseinzadeh opinion, “[s]ome reaction videos. . .intersperse short segments of another’s work with criticism and commentary, while others are more akin to a group viewing session without commentary.” Essentially, reaction videos are exactly what the name suggests: a video showing a person or group of people reacting to the work of another, which by nature requires the incorporation of the work being reacted to for the viewer’s reference. The first time that controversy arose out of the “reaction” genre was in 2015 when the Fine Brothers, the creators of a popular YouTube channel known for its “Kids React” series along with several other “reaction video” series, applied to trademark the term “react.” The brothers did so with the intention to create a program called “React World,” through which they would license out the “reaction video” format to other video creators. This endeavor came not long after the Fine Brothers criticized Ellen DeGeneres for allegedly using their “re- action” format in a segment on her television show, suggesting the brothers’ belief that they were the sole owners of what is, in reality, a widely-used format. As a result, YouTube viewers became distrustful of the Fine Brothers’ intentions in trademarking the format, and viewers criticized them to the point that they issued a public apology in February of 2016 in which they announced their decision to “[r]escind all. . .‘React’ trademarks and applications” and “[d]iscontinue the React World program.” Later in 2016, reaction videos would again become the subject of controversy when Ethan and Hila Klein, the husband-and-wife creators of the popular YouTube comedy channel H3H3 Productions, were sued by Matt Hosseinzadeh of the decidedly less popular You- Tube channel, Matt Hoss Zone, for copyright infringement. Hosseinzadeh alleged copyright infringement for the use of segments of his video, “Bold Guy vs. Parkour Girl,” in a humorous reaction video made by the Kleins.8 What resulted was the aforementioned Hosseinzadeh v. Klein opinion, which set a precedent that will hopefully allow future reaction video creators to produce and share content without their creativity being stifled by the looming risk of copyright infringement lawsuits. Hosseinzadeh alleged that a video, which was part of a series of videos, starring himself as “Bold Guy,” “in which the Bold Guy flirts with a woman and chases her through various sequences” was infringement. Hosseinzadeh alleged that the Kleins’ video entitled “The Big, The BOLD, The Beautiful,” infringed upon “Bold Guy vs. Parkour Girl,” as it featured the couple “comment[ing] on and criticiz[ing] [his] video, playing portions of it in the process.” Accepting the Kleins’ motion for summary judgment, which pleaded the fair use defense, the court held that its “review of the. . .videos makes it clear that [the claim] in which plaintiff alleges that defendants in- fringed plaintiff’s copyrights, must be decided in defendants’ favor.”


2002 ◽  
Vol 71 (2) ◽  
pp. 307-340 ◽  
Author(s):  
Leslie Woodcock Tentler

By the 1930s few Catholics in the United States could have been unaware of their church's absolute prohibition on contraception. A widely-publicized papal encyclical had spoken to the issue in 1930, even as various Protestant churches were for the first time giving a public blessing to the practice of birth control in marriage. Growing numbers of American Catholics had been exposed since at least 1920 to frank and vigorous preaching on the subject in the context of parish missions. (Missions are probably best understood as the Catholic analogue of a revival.) And by the early 1930s Catholic periodicals and pamphlets addressed the question of birth control more frequently and directly than ever before. As a Chicago Jesuit acknowledged in 1933, “Practically every priest who is close to the people admits that contraception is the hardest problem of the confessional today.” A major depression accounted in part for the hardness of the problem. But it was more fundamentally caused by the laity's heightened awareness of their church's stance on birth control and their growing consciousness of this position as a defining attribute of Catholic identity.


Africa ◽  
2019 ◽  
Vol 89 (2) ◽  
pp. 246-265
Author(s):  
Juliet Gilbert

AbstractSince 2012, the influx of affordable smartphones to urban Nigeria has revolutionized how young people take, store and circulate photographs. Crucially, this ever-expanding digital archive provides urban youth with a means to communicate new ideas of self, allowing a marginalized group to display fortunes that often belie their difficult realities. Through gestures and poses, fashion and style, the companionship of others, or the use of particular backdrops and locations, these photographs contain certain semiotics that allude to the subject owning the means for success in urban Nigeria. Similarly, as youth constantly store photographs of themselves on their handsets alongside those of celebrities, patrons and friends, coveted commodities and aspirational memes, they construct personal narratives that place them at the centre of global flows and networks. With the ability to constantly retake, update and propagate photographs, the discrepancies between in- and off-frame identities become ambiguous. This article explores how young people in Calabar, south-eastern Nigeria, use digital photographs on their mobile phones to cultivate new visions of themselves. Arguing that these photographs not only represent superlative aspirations but are also integral to social becoming, the discussion examines how digital images allow youth to reposition themselves within (and beyond) Nigerian society. Ephemerality is central: digital photographs can be easily circulated and retain some permanence on social media, yet these immaterial objects can easily be lost from handsets. In thinking about the futures of African youth and African photography, this article therefore interrogates the tensions of private and public archives.


Author(s):  
Meir Russ

The paper summarizes in a step by step ‘recipe’ format a model of developing new ideas (Ideation) that can be used to form a new venture or develop a new product. The proposed ‘recipes’ are widely used and can be applied in tandem with other prevalently available models or tools. The intention of the paper is also to serve as a resource for entrepreneurs and innovators, and the links and references munificently used in the paper are serving this purpose. The author has used the outline and the tools described here in numerous Ideation classes taught for over a decade in several countries around the world. The paper’s intention is not to conduct a systematic review on the subject of new venture creation or propose new research agenda (for that, see for example Shepherd et al., 2021). The purpose is to provide an effective and efficient set of tools, models and techniques that can assist the entrepreneur in her journey to create and achieve her dreams. One such tool is the matrix of Reasonings-Outcomes introduced here for the first time.


Author(s):  
Ana María Baptista Oliveira Dias Malva Vaz

Abstract.BEHAVIORS AND ATTITUDES OF HIGHER EDUCATION STUDENTS IN RELATION TO SEXUALITYSexuality and the way it should be addressed still has no solutions and the young people continue to have the attitudes/ behaviours they deem appropriate and the results that follow aren’t always the best. The objective is to study the sexuality in young students who attend the first year of higher education (area of health), considering that most of them are for the first time out of their family, with typical experiences of students entering higher education, and also because it is at this stage of life that sexual maturation begins, very close to adulthood. The study is of a quantitative nature, putting in evidence the attitudes and sexual behaviours of young people who have already begun their sexual activity (64.6%). The scale used has four dimensions that are subdivided into: Behavioural Intent: Practice “safe sex”, which is understood as the use of condom. Reactions: positive and negative feelings of the subject towards the use of condom and beliefs about the positive or negative consequences associated with this behaviour. Subjective norm: subjective judgment about the degree of approval-disapproval of certain significant persons to the subject (parents, friends, partner) about the use of condom. Control perception: expectations of self-efficacy, subjective judgment about the degree of conviction in the difficulty or ease of using (or making use) the condom at the next sexual encounter. We have concluded that there is a large percentage who use the condom (36%), followed by a double protection, condom and contraceptional pill (26.1%). Most of those who already had sex, (65%) had sex again with the same partner. Health professionals should understand the complexity of the problem of sexuality and be aware of the reality of the lifestyles adopted by young people, so that they can define strategies for health promotion and intervene in the causes. Keywords: sexuality; young people; behaviours; attitudes; contraceptionpanish and English were: “baile”, “lesión”, “prevención”, “prevalencia”, “flamenco”, “danza”, “dance”, “injury”, “prevention”, “prevalence”, “common”, “frequent”, “lession”, “flamenco” and “ballet”. The majority of injuries occur in the lower extremities and are often related to muscular overload or weakness, rather than traumatisms. These injuries are commonly produced by a lack of technique or a wrong application of it, or even sometimes by the bad fitting-out of the room where the activity is being practised.Keywords: dance, injuries, physiotherapy, prevention, exercises, psychologyResumo.A sexualidade e a forma como deve ser abordada ainda não tem soluções e os jovens continuam a ter as atitudes/comportamentos que entendem e nem sempre os resultados que daí advêm são os melhores. O objetivo é estudar a sexualidade nos jovens estudantes que frequentam o 1º ano do ensino superior (área da saúde), considerando que na sua maioria se encontram pela primeira vez fora do seu agregado familiar, com vivências próprias dos estudantes que ingressam no ensino superior e também porque é nesta fase da vida que se inicia uma maturação sexual, muito perto da idade adulta. O estudo é de natureza quantitativa onde são evidenciadas as atitudes e os comportamentos sexuais dos jovens, que já iniciaram a sua atividade sexual (64,6%). A escala utilizada apresenta quatros dimensões que se subdividem em: Intenção comportamental: praticar “sexo seguro”, que é entendido como uso de preservativo. Reações: sentimentos positivos e negativos do sujeito face à utilização do preservativo e crenças sobre as consequências positivas ou negativas associadas ao desempenho desse comportamento. Norma subjetiva: julgamento subjetivo sobre o grau de aprovação-desaprovação de certas pessoas significativas para o sujeito (pais, amigos, companheiro) sobre o uso de preservativo. Percepção de controlo: expectativas de auto-eficácia, julgamento subjetivo sobre o grau de convicção na dificuldade ou facilidade de usar (ou fazer usar) o preservativo no próximo encontro sexual. Concluímos que existe uma grande percentagem que utiliza preservativo (36%), seguindo-se uma dupla proteção, preservativo e pilula (26,1%). A maioria dos que tiveram relações sexuais, (65%) voltaram a ter relações sexuais com o mesmo parceiro. Os profissionais de saúde devem compreender a complexidade do problema da sexualidade e ter conhecimento da realidade dos estilos de vida adotados pelos jovens, para poderem definir estratégias para a promoção da saúde e intervir nas causas.Palavras chave: sexualidade; jovens; comportamentos; atitudes; contracepção


2009 ◽  
Vol 5 (1-2 (6)) ◽  
pp. 66-71
Author(s):  
Armine Simonyan

One of the contemporary spheres of modern linguistics is the study of political discourse.For a politician, language is a weapon to win the favours of public at large. The article aims to reveal how American politicians use English to receive the support of the nation. The research is conducted on the debates between the US presidential candidates in 2008 – Hillary Clinton and Barak Obama. The reason for the choice is obvious. Both candidates, as members of the same party, seem to have a lot in common. Both belong to the same party, hence, they should have an audience committed to the same democratic principles whereas, the differences are more than obvious. It is the first time in the history of the United States that the post of the US president has two main candidates that are so different – a woman and a coloured man. The article includes research on the tactics and strategies applied by both the candidates.


1987 ◽  
Vol 20 (2) ◽  
pp. 173-199 ◽  
Author(s):  
Michael Shortland

Although phrenology has begun to receive serious attention as a doctrine of mind, as popular science, as part of medical history, as a vehicle for social and ideological interests, and as an important component of American and European (especially British) culture in the early nineteenth century, there is one aspect of it which has evaded the eye of contemporary historians.’ This is the place within phrenology of the understanding of human sexuality. This is a subject of manifest general historical interest, and one whose neglect by scholars seems all the more striking once it is recognized that phrenologists themselves often judged it the most crucial, the best evidenced, and the most impressive part of their system of beliefs. In turning for the first time to phrenological attitudes to sex, my objective in what follows is not to offer an exhaustive treatment but rather to set down the broad lines of development followed by organological and phrenological doctrines. It is hoped that this will encourage and enable historians to consider the subject in further detail and from other perspectives. Other topics of research may also be suggested by the material that is presented here. For example, if phrenology was as important in the early decades of the nineteenth century as is now widely accepted, and if the views of sexual instinct within the theory and practice of phrenology were of the kind which I shall suggest, then it may be that our general attitudes to sexuality during the period under consideration stand in need of reassessment. This is an issue to which I hope to devote a further article; for the moment, a presentation of materials within a mainly expository framework may serve a valuable function.


1943 ◽  
Vol 37 (2) ◽  
pp. 262-274 ◽  
Author(s):  
Hugh McKinnon Wood

Writers on international law agree that its development in its present form began in the 16th century among the Christian States of Europe, when the feudal organization of the continent gave place to its modern organization in the “sovereign, independent” States of the traditional terminology, and that originally it was considered as not applying, or as not fully applying, to States outside the pale of Christian civilization. At the end of the 18th and until well into the 19th centuries it was common for treatises on the subject to bear titles referring not to “International Law” but to “European International Law,” although such a title had ceased to be appropriate after the attainment of independence by the United States. It is also usually said that Turkey, the first Mohammedan State to join the family of States between which international law is in force, was brought into the family and made for the first time a subject or “person” of international law by Article 7 of the Treaty of Paris of March 30, 1856, which terminated the Crimean War. This view has, however, been disputed by A. H. Smith who argues that “for many centuries Turkey had maintained diplomatic intercourse and concluded treaties with Great Britain and other European Powers and … the general body of international law was considered to apply,” and that the alleged recognition appears to have made no practical difference; and who accordingly suggests the meaning of the article to be that Turkey was formally “admitted to the specifically European group of nations which was deemed to have been established by the Vienna settlement of 1815.” Smith gives no details regarding the evidence on which his view is based, and other writers habitually content themselves with quoting the text of the article. It may be interesting to consider what light contemporary evidence throws upon the matter.


2019 ◽  
Vol 31 (5) ◽  
pp. 721-745
Author(s):  
Claire Angelique Nolasco ◽  
Michael S. Vaughn

Many prisoners enter correctional facilities in the United States with little history of good dental hygiene and even less history of access to dentists. Thus, the incarceration experience presents opportunities for inmates to receive quality dental care, often for the first time. Dental care delivered by correctional dentists is complicated, however, by the array of serious dental conditions and difficult to treat dental problems in clinical settings. These conditions exist within a legal environment that mandates adequate dental care be provided to prisoners by the state. This article examines prisoners’ Section 1983 lawsuits, claiming that delays in the delivery of dental care violate inmates’ federally guaranteed rights. The analysis focuses on what the U.S. Circuit Courts of Appeals have required of correctional officials and dentists in the form of dental care, concluding with nine best practices for correctional dental practitioners to follow to avoid Section 1983 liability.


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