This paper introduces the XSalsa20 stream cipher. XSalsa20 is based upon the Salsa20 stream cipher but has a much longer nonce: 192 bits instead of 64 bits. XSalsa20 has exactly the same streaming speed as Salsa20, and its extra nonce-setup cost is slightly smaller than the cost of generating one block of Salsa20 output. This paper proves that XSalsa20 is secure if Salsa20 is secure: any succes...

Abstract In this Paper a multi item EOQ model with stock dependent demand for deteriorating items is considered in fuzzy environment. Inventory costs such as holding cost and setup cost have been represented by exponential membership function and profit, deteriorating rate and total investment constraint are represented by linear membership functions. The model has been solved by fuzzy non-line...

We consider a continuous-time variant of the classical Economic Lot-Sizing (ELS) problem. In this model, the setup cost is a continuous function with lower bound Kmin > 0, the demand and holding costs are integrable functions of time and the replenishment decisions are not restricted to be multiples of a base period. Starting from the assumption that certain operations involving the setup and h...

As society places greater demands on technology, it becomes increasingly important to be able to simulate that technology. While simulation tools can be very sophisticated and capable of handling very complex devices and structures, the cost paid in computation time can be prohibitive. To reduce this time, a number of one-step schemes have been developed, but these schemes suffer from a setup t...

Stereo and 3D reconstruction are used by many applications such as object modeling, facial expression studies and human motion analysis. But synchronizing multiple high frame rate cameras require special hardware or sophisticated software solutions. In this paper, we propose a single camera stereo system by using a setup made of prism and mirrors. Our setup is cost effective, portable and can b...

Resource-constrained project scheduling with activity pre-emption assumes that activities are allowed to be interrupted and restarted later in the schedule at no extra cost. In the current paper, we extend this pre-emptive scheduling problem with setup times between activity interruptions and the possibility to fast track pre-emptive subparts of activities. The contribution of the paper is twof...

Routing and wavelength assignment for online real-time multicast connection setup is a difficult task due to the dynamic change of availabilities of wavelengths and the consideration of wavelength conversion delay in wavelength division multiplexing (WDM) networks. This paper presents a distributed routing and wavelength assignment scheme for the setup of real-time multicast connections. It int...

Remote laboratories are normally developed for giving students and others remote access to physical laboratory facilities. In contradiction to this, the main objective of the setup presented in this paper is to create a controlled environment where unwanted side activities like hardware setup, driver problems, troubleshooting faulty components, and struggles with special software for configurin...

This paper considers single machine scheduling and due date assignment with setup time. The setup time is proportional to the length of the already processed jobs; that is, the setup time is past-sequence-dependent (p-s-d). It is assumed that a job's processing time depends on its position in a sequence. The objective functions include total earliness, the weighted number of tardy jobs, and the...