The second approach to the management of leucoderma focuses on repigmentation therapies. Common therapies are of three types: The topical application of potent corticosteroids, (PUVA) psoralen photochemotherapy and surgical therapies. Of these interventions PUVA is considered the most effective treatment available in the United States, however the treatments are time-consuming, side effects can be severe, 4 and complete repigmentation only occurs in 15-20%. 5 Interestingly, psoralens used with photochemotherapy are obtained from the ancient Ayurvedic herb known as Vakuchi (psoralea corylifolia). 
8. Require a metalearning essay. On the day you collect the papers, have students write an in-class essay about what they learned from the assignment. What problems did they face and how did they overcome them? What research strategy did they follow? Where did they locate most of their sources? What is the most important thing they learned from investigating this subject? For most students, who actually did the research paper, this assignment will help them think about their own learning. It also provides you with information about the students' knowledge of their papers and it gives you a writing sample to compare with the papers. If a student's knowledge of the paper and its process seems modest or if the in-class essay quality diverges strikingly from the writing ability shown in the paper, further investigation is probably warranted.
This paper reports a new design topology of 4 pole hybrid electromagnetic levitation system in conjunction with linear synchronous motor. The mover, 4 pole hybrid electromagnet, is levitated underneath of the linear motor with zero power control algorithm. Propulsion and one-dimensional planar motion of the hybrid electromagnet is provided by the vector controlled linear motor. The new design of 4 pole hybrid electromagnet has several improvements over older systems, such as weight reduction and less material usage. Diagonal drive integration of mover and linear motor is proposed and experimental results are presented.