德国高校的junior professor是什么意思?相当于assisstant professor, asscocia

德国高校的junior professor是什么意思?相当于assisstant professor, asscociate professor么?还是就是professor比较年轻的版本呢?谢谢!
您确定juniorprofessor就是助教对么?
助教和助理教授有什么区别啊?谢谢!

补充：
助教不是教授,而是教授手底下干活的人
而助理教授就像副教授正教授一样,是教授的一个分类.
不是助教 参考这篇文章 http://www.eui.eu/ProgrammesAndFellowships/AcademicCareersObservatory/AcademicCareersbyCountry/Germany.aspx#RequirementsForPositions
这段文字
To become Scientific Assistant or Junior Professor, a PhD degree is required. As already mentioned, both positions can be held for maximum six years.
Assistants are working toward their Habilitation, while Junior Professors do not have to write a Habilitation. Instead, they have to carry out a wider variety of tasks, including research, teaching, administration and management. In practice, however, the Junior Professorship has not (yet?) become a strong alternative to the Habilitation track. This has become evident, for example, in the area of Law. Not many universities created Junior Professorships and scholars who did obtain such positions are encouraged to write a Habilitation nonetheless.
The procedure to become a Junior Professor involves several stages and can easily take a year. Both an internal and an external commission rank the candidates. In case both lists correspond with each other, the final ranking is presented to the faculty. Subsequently, the principal of the university has to agree on the list, after which it is sent to the minister of eduction of the Bundesland for final approval.
To become W2 Professor, one needs the Habilitation (in the case of Scientific Assistants) or a positive evaluation of the Juniorprofessur (in the case of Junior Professors).
The Habilitation is an additional stage of qualification after the PhD and is also called the “second PhD”. Usually, scholars write their habilitation while in employment as assistants of professors (Wissenschaftliche Assistenten). The habilitation can be either a thesis (opus magnum) or several scientific publications of outstanding quality (cumulative Habilitation). The habilitation commission of the faculty makes the decision regarding the acceptance of a habilitation. This committee grants the academic title of Private Lecturer (Privatdozent) and the teaching licence (venia legendi). After having achieved this academic grade, scholars can apply for professorships. Habilitated academics who do not have a full professorship at a university have the status of Private Lecturer and may work as freelancers for or be employed by the university.
The procedure for the appointment of professors (Berufungsverfahren) is the same at all German universities. In the Humanities and the Social Sciences, a committee of the faculty presents a shortlist of three candidates to the faculty. Members of the appointment committee may be representatives of other faculties, but special attention is paid to the "subject specific competence". According to the provisions of the Federate State laws, at least nine individuals [candidates or jury members?] must participate in the procedure. A "sufficient number" of expert opinions are collected from experts who do not have a personal relationship with the candidates and who have an established academic reputation in the academic community. These experts are asked to provide comparative evaluations of all the candidates.
According to the normal appointment procedure, the appointment committee sends a ranked list to the university senate, which is free to modify the list before it is submitted to the ministry. The ministries cannot easily justify ignoring the lists but they are free to appoint one of the three candidates. It happens that the ministry disregards suggestions emanating from the faculties.
An important feature of German academia is that with the exception of Junior Professors, habilitated academics usually cannot obtain a W3 professorship at their own university. This is specified in the Higher Education Act (HRG) and is called internal promotion prohibition.