Small firms in developing countries are typically modeled as facing a frictionless market for workers, characterized by low search costs, full information, and a lack of regulation. We report the results of a field experiment that randomly placed unemployed young people as apprentices with small firms in Ghana. The program provided a novel worker screening technology to firms (in addition to si...

On a noncommutative space of rank-1, we construct a codimension-one soliton explicitly and, in the context of noncommutative bosonic open string field theory, identify it with the D24-brane. We compute the tension of the proposed D24-brane, yielding an exact value and show that it is related to the tension of the co-dimension two D23-brane by the string T-duality. This resolves a puzzle posed b...

he empirical studies have shown that cost advantages can occur due to economies of scale and economies of learning. However, a few studies have attempted to distinguish between these two effects on reducing costs. This paper is the first attempt on recognizing the impact of learning on reducing the cost with distinguishing the effect of economies of scale in Iran. Therefore, this study aims to ...

hoosing the appropriate site is important in the construction of units such as agricultural processing industries. In this study, we try to determine the factors affecting the exploitation of the agricultural processing industries and measure the share of location as one of the important issues in locating research. The 2572 data were collected from the Agricultural Jihad Organization of Mazand...

On a noncommutative space of rank-1, we construct a codimension-one soliton explicitly and, in the context of noncommutative bosonic open string field theory, identify it with the D24brane. We compute the tension of the proposed D24-brane, yielding an exact value and show that it is related to the tension of the codimension-two D23-brane by the string T-duality. This resolves an apparent puzzle...

Cartesian product file (CPF) has been proposed as a good multi-attribute file structure. Although designing an optimal CPF for partial match queries (PMQs) has been proven to be NP-hard, some useful properties have been studied for PMQs to help the work. However, a good CPF for PMQs may not be beneficial for orthogonal range queries (ORQs). Therefore, in this paper, we intend to study propertie...

It is well known that there are 17 crystallographic groups that determine the possible tessellations of the Euclidean plane. We approach them from an unusual point of view. Corresponding to each crystallographic group there is an orbifold. We show how to think of the orbifolds as artifacts that serve to create tessellations. 1. TESSELLATIONS. The history of human civilization gives an enormous ...

A parametric study of the buckling behavior of infinitely long symmetrically laminated anisotropic plates that are subjected to linearly varying edge loads, uniform shear loads, or combinations of these loads is presented. The study focuses on the effects of the shape of linearly varying edge load distribution, plate orthotropy, and plate flexural anisotropy on plate buckling behavior. In addit...

Amoxicillin/clavulanic acid (AMC) is frequently prescribed in maintenance HD patients, mainly for treating community-acquired respiratory tract infections. As this β-lactam antibiotic exhibits a time-dependent killing, amoxicillin (AMX) concentrations exceeding the minimal inhibitory concentration (MIC) at least 50% of treatment time are recommended,1Turnidge J.D. The pharmacodynamics beta-lact...