How do wings generate lift?

How lift is generated by a moving wing is understood satisfactorily. But the rigorous explanation requires elaborate theoretical background, and hence there are many simpler explanations in the popular literature. In the first part of this article, some such popular models are discussed after briefly dealing with some required preliminary ideas. The concluding part of the article will deal with some simple quantitative models and then tie up many of these simple ideas and propositions together to the rigorous momentum conservation principle placing these popular models in perspective.     

How did I do?

A rookie police officer was out for his first ride in a cruiser with an experienced partner. A call came in telling them to     

How do apes ape?

In the wake of telling critiques of the foundations on which earlier conclusions were based, the last 15 years have witnessed a renaissance in the study of social learning in apes. As a result, we are able to review 31 experimental studies from this period in which social learning in chimpanzees, gorillas, and orangutans has been investigated. The principal question framed at the beginning of this era, Do apes ape? has been answered in the affirmative, at least in certain conditions. The more interesting question now is, thus, How do apes ape? Answering this question has engendered richer taxonomies of the range of social-learning processes at work and new methodologies to uncover them. Together, these studies suggest that apes ape by employing a portfolio of alternative social-learning processes in flexibly adaptive ways, in conjunction with nonsocial learning. We conclude by sketching the kind of decision tree that appears to underlie the deployment of these alternatives.     

How do people radicalize?

Very little is known about how violent extremist practices are learned, and the role of educational channels through which they are spread. This empirical study extrapolates insights specific to the Bosnian and Herzegovinian context to demonstrate how one ultraconservative ideology, Salafism, can radically alter the dominant thinking and behavior of ordinary individuals once they feel displaced from the mainstream institutions and particularly from the formal education. At the core of the displacement and replacement model of radicalization is an informal and tactful teacher, influencer, or a mentor that individuals connect with either online or in person. Using the primary data collected in Bosnia and Herzegovina through 20 in-depth and semi-structured interviews with radicalized persons, the study sequences a ten-step radicalization model through which the interviewees have transformed from ordinary citizens into radicalized actors with a potential to engage in violent extremism.     

“How do you do?”&“How are you?”

一、意义的区别: “How are you?”为问句,意为“你好吗”,而“How do you do?”形式上是问句,实际上为问候语,意为“你好”。二、使用场合的区别: “How are you?”用以询问对方的身体健康状况,多用于朋友或熟人之间:“How do you do?”则用于两个人初次见面时的相互问候。     

How do gems cure diseases?

Our body is composed of seven primary colors of the solar ranges: violet,indigo(靛蓝色)blue, green, yellow and red These are called primary colors and mixing one or two primary colors makes other hues (色调)and shades. When there is deficiency or absence of any one of these primary colors,our bodies were attacked with the disease caused by that shortage.     

How do you teach learning?

The question ‘How do you teach ‘learning'?’ is located within the domain of professional adult education practice and is dealt with through a series of ‘stock‐taking’ moves through the field of practice. First, we offer a high‐level overview of standard answers to the question imbedded in contemporary educational practice. Second, we examine the adult education case in particular, focussing on the peculiarly idealised role the ‘adult learner’ has come to assume in international practitioner discourse. Third, we narrow the focus sharply to present a brief case‐study of our own attempts to teach ‘learning’ within the Advanced Diploma Course for Educators of Adults at the University of Cape Town. Finally, we attempt to clarify our present assumptions about the requirements of a ‘curriculum for learning’. (1) 1. An earlier version of this paper was presented at the Kenton Educational Conference, University of the Witwatersrand, Johannesburg, South Africa, in November 1992.

     

How much do M&M's weigh?

This article presents activities appropriate for the first half of a general introductory statistics course. All activities revolve around the same data set collected early in the course. The activities require students to make decisions about how they should proceed.     

How do I learn English?

When I was very young, with my mother's influence, I fell in love with English. I liked it so much that my parents sent me to an English class when I was eight. I was young and I couldn't fit at first. The strange English words were hard for me to accept. And then, the teacher taught me the basic English-phonetic, symbols and ABC. They helped me to learn English words     

How do students misunderstand number representations?

We used both student interviews and diagnostic testing to reveal students’ misconceptions about number representations in computing systems. This article reveals that students who have passed an undergraduate level computer organization course still possess surprising misconceptions about positional notations, two's complement representation, and overflow. Contrary to common opinion, these misconceptions are widespread and reveal the need for instruction that specifically targets these misconceptions. In addition, these misconceptions will serve as the basis for the creation of a standard assessment tool called the digital logic concept inventory. This concept inventory will provide a rigorous and quantitative metric to assess the effectiveness of new teaching methods.     

How do teachers perceive environmental responsibility?

Environmental responsibility can be collective or individual. In environmental education, private-sphere responsibility is often promoted. However, emphasising individual pro-environmental behaviour may cause problems, such as feelings of guilt and powerlessness, a focus on ineffective activities, and gendered responsibility. In this article, I discuss the perceptions of 13 environmentally minded Finnish teachers concerning environmental responsibility. Results suggest that the individualisation of environmental responsibility may limit educational possibilities at school. Although the interviewees are well aware of significant environmental behaviours, they perceive their pupils’ range of action possibilities as narrow. Based on the results, I suggest that collective responsibility be promoted in environmental education, and practitioners should develop easy options for youth participation.     

How do doctoral students experience supervision?

Supervision has been shown to have a high impact on doctoral students' development. However, little is known about how students perceive not only negative but also positive doctoral experiences, as well as their strategies for dealing with perceived problematic situations. The aim of this study is to analyse and relate doctoral students' significant supervision experiences to the strategies they use to cope with these experiences when they perceive them as challenging or negative. A total of 1173 doctoral students from different research-intensive Spanish universities responded to four open-ended questions about their most significant experiences in their doctoral journey, associated feelings and strategies to deal with them. We identified a total of 223 experiences related to supervision that were distributed into five categories: 1) central prerequisites for supervision, 2) supervisor choice, 3) supervision of the research process, 4) coaching and 5) project management. The results showed three distinct ways, as reported by the students, of handling the perceived negative supervision experiences: 1) no strategy, 2) local strategy and 3) regulatory strategy. The results suggest that analysing both positive and negative experiences may better capture variability in students' supervision experiences. A relation between experiences with supervision and students' satisfaction was also detected.     

How do Teachers Teach Memory Skill?

Research on teachers' efforts to influence the ways in which children approach memory tasks and understand and regulate their own memory processes has been limited, possibly because of the restrictive views of memory held by cognitive theories that have previously guided research efforts. A more complex perspective on the memory skills that develop over the elementary school years has been elaborated by developmental psychologists and information-processing theorists, but their work has had limited influence on either teacher-training practices or research in teaching. In order to begin to apply this newer perspective to an understanding of classroom teaching processes, research needs to consider teacher practices and expectations for children's learning and memory. A program of research that has been concerned with how teachers teach memory and metacognitive skills and with teachers' views of memory processes is summarized in this article, and implications for teacher training are discussed.     

How do you make students learn more?

This article deals with the system of professional and vocational education and training in secondary schools in the Republic of Slovenia. It presents a research project, conducted on a sample of Slovene businesses. The purpose of the research was to establish whether companies that employ secondary school graduates are satisfied with their knowledge. It also shows one way to increase the knowledge of students in schools.     

Unit 1 How often do you exercise?

新目标8年级萜1.H ow often do you exercise?你多久锻炼一次?句中的how often意为“多久(一次)”,用来询问动作间隔的时间长度,动作发生的频率。通常是对一些表示频率的副词提问,如al-w ays,usually,often,som etim es,hardly,ever,never等。也可以对表示“多久几次”之类的短     

Unit 4 How do you get to school?

Hello,boys and girls.在这个单元中,我们将以“你怎样去学校”为主题,学习表达怎样到达某一地点,即以“how”开头的问句,并学习有关乘坐交通工具的习惯用语和固定搭配等知识。重点、难点知识点拨