第一章艺术的本质与特征 1.“艺术学之父”(德)康拉德费德勒(1841-1895) 2.艺术学包括三方面: 艺术理论、艺术史、艺术批评一音乐学、美术学、舞蹈学、电影学、上编艺术总论

自有历史记载以来,就一直有男士和女士佩戴假发,或是为了美观,或是有实际的原因。据说古埃及人佩戴假发是为了保护头部免遭太阳的烤晒。在古埃及,假发最初只有上层社会的人士佩戴,最后所有阶层的人们都能佩戴,除了牧师和劳动者。 其它文明古国,比如罗马和希腊,也根据当时的服饰和习俗而有不同程度的佩戴假发的习惯。在罗马帝国,有一种女士发型叫做“奥必丝”,它需要用刷子将头发向前梳,在前 部产生大量的非常卷曲的卷发

自有历史记载以来,就一直有男士和女士佩戴假发 幻灯片3或是为了美观,或是有实际的原因。据说古埃及人佩戴假发 是为了保护头部免遭太阳的烤晒。在古埃及,假发最初只 上层社会的人士佩戴,最后所有阶层的人们都能佩戴,除了 牧师和劳动者

一、编发的基础知识 编辫技术是盘发中最基础的技巧,它包括两股,三股以及三股以上的发束进行交叉编织。发辫的起源早在几千年以前的古代,妇女们就有编辫的习惯。但是近几年来,随着美发技术的不断发展,发辫的编织不断的创新变化,再度受到女性的青眯

一、编发的基础知识 编辫技术是盘发中最基础的技巧,它包括两股,三股以 及三股以上的发束进行交叉编织。 发辫的起源 早在几千年以前的古代,妇女们就有编辫的习惯。但是 近几年来,随着美发技术的不断发展,发辫的编织不断的创新变化,再度受到女性的青眯

In this course we will study Classical Mechanics. Particle motion in Classical Mechanics is governed by Newton's laws and is sometimes referred to as Newtonian Mechanics. These laws are empirical in that they combine observations from nature and some intuitive concepts. Newton's laws of motion are not self evident. For instance, in Aristotelian mechanics before Newton, force was thought to be required in order

is a vector equation that relates the magnitude and direction of the force vector, to the magnitude and direction of the acceleration vector. In the previous lecture we derived expressions for the acceleration vector expressed in cartesian coordinates. This expressions can now be used in Newton's second law, to produce the equations of motion expressed in cartesian coordinates

In this lecture we will look at some other common systems of coordinates. We will present polar coordinates in two dimensions and cylindrical and spherical coordinates in three dimensions. We shall see that these systems are particularly useful for certain classes of problems Like in the case of intrinsic coordinates presented in the previous lecture, the reference frame changes from point to point. However, for the coordinate systems to be presented below, the reference frame depends only on the position of the particle. This is in contrast with the intrinsic coordinates, where the reference frame is a function of the position, as well as the path

In lecture D2 we introduced the position velocity and acceleration vectors and referred them to a fixed cartesian coordinate system. While it is clear that the choice of coordinate system does not affect the final answer, we shall see that, in practical problems, the choice of a specific system may simplify the calculations considerably. In previous lectures, all the vectors at all points in the trajectory were expressed in the

We have seen that the work done by a force F on a particle is given by dw =. dr. If the work done by F, when the particle moves from any position TI to any position T2, can be expressed as, W12=fdr=-(V(r2)-V(1)=V-v2, (1) then we say that the force is conservative. In the above expression, the scalar