The purpose of this commentary is to encourage academics be more open about the intellectual challenges involved in undertaking research. To that end, I will tell you my story confronting an dead end and reflect on general lessons could drawn from experience.

It was shown recently in Nevers, France, Sherbrooke, Canada and Salford, UK, that porous materials with semi-opened pores or materials with open pores bearing lateral cavities or resonators at the microscopic scale of the pores can result in peculiar sound absorption properties. Various examples of these materials can be found in engineering and in everyday life including bio-based materials. T...

Understanding the behaviours of swimming microorganisms in various environments is important for understanding cell distribution and growth in nature and industry. However, cell behaviour in complex geometries is largely unknown. In this study, we used Tetrahymena thermophila as a model microorganism and experimentally investigated cell behaviour between two flat plates with a small angle. In t...

Obviously navigation is one of the most complicated issues in mobile robots. Intelligent algorithms are often used for error handling in robot navigation. This Paper deals with the problem of Inertial Measurement Unit (IMU) error handling by using Extended Kalman Filter (EKF) as an Expert Algorithms. Our focus is put on the field of mobile robot navigation in the 2D environments. The main chall...

In mobile ad hoc wireless networks (MANETs), traditional protocol like AODV performs well for low mobility of nodes but not for high node mobility. So, it becomes important to consider mobility factor during the path selection procedure of routing protocol. Here, a fuzzy logic mobility based protocol (FLMAODV) that considers the mobility factor is proposed. Due to the consideration of mobility ...

The problem of planning in partially observable environments can be regarded as a search problem in belief space where beliefs express the collection of states that are deemed possible. In this paper we address the problem that arises when one of the possible states is a dead-end: a state from which the goal cannot be reached. In such situations, no contingent plan exists, and yet, such situati...

abstract background: the quantitative studies show that due to the widespread prevalence, high death rate, high treatment expenses, and long hospital stay, leukemia influences the families and their children to a great extent. in this regard, no qualitative study has been conducted in iran. so, this study was conducted in arak in 2011 with the aim of expressing the experiences of the parents wh...

1 Semantic Orientation of Adjectives Antonymy Linguistic tests for complementaries and antonymy type Linguistic vs. natural polarity Antonymy Linguistic tests for complementaries and antonymy type Linguistic vs. natural polarity Oppositeness and Antonymy There are different kinds of opposites: complementaries and antonyms Semantic orientation: degree of positiveness/negativeness. Many antonyms ...