Abstract: This paper studied a novel parallel machine rescheduling problem with controllable processing times under machine breakdown and precedence constraints. This problem is strongly $\mathcal {NP ...

Just like in English, sentences in Spanish usually contain a verb. Verbs can be used to describe an action, a feeling or to describe something that is happening. In Spanish, verbs need to be ...

The active and passive voice are different ways of structuring the same information in a sentence. In the active voice, the subject of the sentence comes first and performs the action (the verb). The ...

In French, when speaking in the past tense, one must constantly choose between the imparfait and the passé composé. In this exercise we will focus on the formation and the use of the imparfait versus ...