一、案件由来申请人:丁某,女,50岁。被申请人:郑州市某学校。仲裁请求:依法裁决被申请人做出的解除其聘用关系的处理决定无效。2004年6月,申请人丁某经被申请人同意赴美国交流学习一年,一年期满后丁某逾假未归。2006年12月,经单位领导集体研究,作出解除与丁某之间聘 First, the origin of the case Applicant: Ding, female, 50 years old. Respondent: Zhengzhou City, a school. Arbitration Request: According to the law, the respondent's decision of dismissing the employment relationship is invalid. June 2004, the applicant Dingmou by the respondent agreed to go to the United States to study and exchange for one year, one year after the expiry of Dingmou failed. December 2006, the collective leadership of the unit to study, made between Ding and the lifting of employment