for a graph g, let d(g) be the set of all strong orientations of g. the orientationnumber of g is min {d(d) |d belongs to d(g)}, where d(d) denotes the diameterof the digraph d. in this paper, we determine the orientation number for some subgraphs of complete bipartite graphs.

A recent theoretical investigation has demonstrated that three-dimensional (3-D) eye position dependencies in the geometry of retinal stimulation must be accounted for neurally (i.e., in a visuomotor reference frame transformation) if saccades are to be both accurate and obey Listing's law from all initial eye positions. Our goal was to determine whether the human saccade generator correctly im...

The directed movement of human polymorphonuclear leukocytes (PMN) in a plane (Zigmond chamber assay) is described by a statistical model. We demonstrate that (a) the movement of a single cell is a superposition of a directed and a random movement, and (b) the degree of orientation, P1, of moving cells in a chemotactic gradient can be determined either by the time average of a single cell or by ...

This article analyses the basic concepts of sociology legal implementation, interaction social factors and on implementation individuals organizations. The also emphasises need to inherit, supplement develop traditional theory law implementation. On that basis, authors analyse role development orientation in order provide theoretical empirical studies propose solutions ensure effectiveness prac...

background religion and health have recently received much attention in modern medicine. several studies in various parts of the world have supported the role of religion as a protective factor against mental disorders. one of the common traumas in the field of mental health is suicidal behaviors. adherence to religious beliefs plays an important role in preventing suicidal behaviors. objective...

introduction: marital satisfaction is a positive relationship with spouse’s family, positive dynamism in the original family, self-esteem and religious homogeneity of couples. religion is one of the most effective spiritual fulcrums that are able to provide the meaning of life in every moment of life. religious beliefs and credence are important factors in marital satisfaction. the main purpose...

National Aeronautics and Space Administration’s Asteroid Redirect Mission (ARM) aims to capture a Near Earth Orbit (NEO) asteroid or a piece of a large asteroid and transport it to the Earth–Moon system. In this paper, we provide a detailed analysis of one of the main control challenges for the first ARM mission concept, namely despinning and three-axis stabilizing the asteroid and spacecraft c...