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当今社会，城市为人们提供了一个安全的安逸的生活环境还是像过去一样充满腐败和缺陷?这是我们有必要问问自己的问题。我们可以这样认为，在大多数情况下,很多人都去过城市，经历过体验过城市生活，无论是出于求学，还是出于事业，亦或是简简单单地一次旅游。城市会让人们感到友好和安全吗?城市是充满多样性的吗?

这些都是时常会考虑到的问题,可能涉及到另一种生活方式或另一个城市。简雅各布斯,作品“伟大的美国城市的生与死”的作者,打开他的书，首先映入眼帘的就是他对城市规划和重建的攻击。他不同意重塑现代城市或改造传统城市构造的原则和目标。她指出,城市规划者和重塑者本人并不关心这个城市，他们仅仅把城市当做一个没有生命的改造对象，而不是一个活的有机体。她提出的四项原则是一个城市获得安全和多样化环境所必需的。它们包括高密度(人口和住宅),混合居住,街区和新老建筑。此外，还比较分析了三所大学,包括天普大学,费城德雷克塞尔大学和费城的科技大学(USP)，以证明他们的建造是否符合雅各布斯所提出的城市构筑原则，是否这样的原则可以确保城市安全和安逸。

Do cities today provide a safe environment for its people to live in or are they still corrupt and full of flaws like in the past? This is a question one must ask themselves. It can be agreed that for the most part, many people have in some way experienced city life, whether it may be for their education, careers, or just for something as simple as travel purposes. Did the city feel people friendly and safe? Was it full of diversity?

These are all questions that can relate one way or another to cities in general. Jane Jacobs, author of the work “The Death and Life of Great American cities”, opens her book stating that it is an attack on city planning and rebuilding. She disagrees with the principles and aims that shaped the modern and orthodox city planning and rebuilding in her time. She states that the city planners and rebuilders personally do not care about the city and consider it as a dead object rather than a living organism. She proposes four principles in which are required to make a city a safe and diverse environment. They include high densities (of population and dwellings), mixed occupancy, short blocks, and old and new buildings. A comparative analysis was taken of three Universities which include Temple University, Drexel University, and University of the Sciences in Philadelphia (USP) to see whether or not any of them exhibited any of the principles proposed by Jacobs to create a safe city environment.

Each of the Universities had their similarities and differences in which they contained and lacked a few of these principles. While the city may seem safer than it was in the past, and while the Universities may exhibit some of these essentials, it can be agreed that the principles that Jacobs proposes are still necessary today and are required to create a safe and diverse city environment.

Jacobs believes that there should be a high density of population and buildings and that these buildings should exhibit mixed occupancy. A vast amount people are required so that places such as the streets, parks, and other enterprises are occupied. Without high densities of people, there would be very little convenience and diversity in places that require it. As for the dwelling aspect of it, she believes that buildings need to be added all through the areas but serving for mixed uses so that people on the streets can be well spread through all hours of the day. Mixed uses include things such as entertainment, work, and shopping; keeping in mind that they are also being intensively occupied and attracting more people rather than just being there for its physical purposes. To illustrate its importance she gives an example about her personal experience at a district in Boston cal本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。