1. ABSTRACT In this paper, we present the results of a comparative evaluation of a "virtual Lego" system against real Lego bricks with novice users. The virtual Lego system was designed to emulate the behavior of real Lego bricks as close as possible, while still allowing for efficient operation. We implemented two different user interfaces for the virtual Lego system, namely controlling it wit...

in (golchin a. and rezaei p., subpullbacks and flatness properties of s-posets. comm. algebra. 37: 1995-2007 (2009)) study was initiated of flatness properties of right -posets  over a pomonoid  that can be described by surjectivity of  corresponding to certain (sub)pullback diagrams and new properties such as  and  were discovered. in this article first of all we describe po-flatness propertie...

operation karbala-5 is one the important and valuable experiences of irgc during the eight-year holy defense. studying and assessing this important and extensive operation from the various strategic, com manding, tactical, and combat angles is very important and valuable as well. in the new copy of negin magazine no. 45, this article (distracted from an archived tape numbered 2666 in the center...

In (Golchin A. and Rezaei P., Subpullbacks and flatness properties of S-posets. Comm. Algebra. 37: 1995-2007 (2009)) study was initiated of flatness properties of right -posets  over a pomonoid  that can be described by surjectivity of  corresponding to certain (sub)pullback diagrams and new properties such as  and  were discovered. In this article first of all we describe po-flatness propertie...

Let (R,m) be a Noetherian local ring, M be a finitely generated R-module of dimension n and a be an ideal of R. In this paper, generalizing the main results of Dibaei and Jafari [3] and Rezaei [8], we will show that if T is a subset of AsshR M, then there exists an ideal a of R such that AttR Hna (M)=T. As an application, we give some relationships between top local cohomology modules and top f...

Research studies on students' writing anxiety have been done in many EFL teaching contexts. However, there are still very limited scientific articles published about university foreign language and the causes Indonesian context. Therefore, this study's main purpose was to analyze its causes. This study employed a descriptive quantitative method. The subjects were chosen from first-year students...

Hyperhomocysteinemia is a factor that is found to be responsible for the development of atherosclerosis in the setting of chronic Helicobacter pylori (H. Pylori) infection. In the recent years, homocysteine (Hcy) has been demonstrated to be an important contributor to atherosclerosis. This study was undertaken to elucidate whether in patients with uremia on maintenance hemodialysis (HD), the in...

abstract. let x be a vector space over a field k of real or complex numbers.we will prove the superstability of the following golab-schinzel type equationf(x + g(x)y) = f(x)f(y); x; y 2 x;where f; g are unknown functions (satisfying some assumptions). then we generalize the superstability result for this equation with values in the field of complex numbers to the case of an arbitrary hilbert spac...

Complex I (NADH:ubiquinone oxidoreductase) is crucial to respiration in many aerobic organisms. The hydrophilic domain of complex I, containing nine or more redox cofactors, and comprising seven conserved core subunits, protrudes into the mitochondrial matrix or bacterial cytoplasm. The α-helical membrane-bound hydrophobic domain contains a further seven core subunits that are mitochondrial-enc...