Mashhad Plain affects by a series of active faults in the northern margin of the Binalud and the southern margin of the Kopet-Dagh mountain ranges. The activity of these faults forms the morphology of the stepped bedrock of the Plain. In addition, the faults’ activities in the Quaternary period are the main effective parameters in thickness and texture of aquifer deposits in Mashhad Plain. In t...

northern khorasan province is located in north-east iran. according to demarton coefficient, it is a semiarid region. arid and semi-arid or subhumid zones are characterized by temperature variations, low and erratic rainfall, periodic droughts and different associations of vegetative cover and soils. this article looks at current dry lands and general guidelines for finding the best area for dr...

Over the past four years, despite low resource allocations to the North, northern residents and community organizations have taken significant initiatives towards the development of health research. In this commentary, we present a model for the development of northern health research based on our experiences in establishing the Institute for Circumpolar Health Research (ICHR) in the Northwest ...

Suppose imitation becomes easier in developing countries due to international technology diffusion or other reasons. If imitation also occurs in the North, Northern imitators (as well as innovators) would become less secure from low-cost Southern imitations. Does the resulting rise in Southern imitation lead to a decrease in Northern imitation (and perhaps even innovation)? If so, does the over...

This simple paper models the production allocation choices of a multinational enterprise (MNE) in a three-country framework -a northern country and two southern countries. The products made in the southern countries are of lower quality, and have higher substitutability than those between the south and the north. We investigate how exchange rates affect production, employment, profits and welfa...

The present Atlantic thermohaline circulation is dominated by deep water formation in the north despite the fact that surface buoyancy forcing has relatively modest latitudinal asymmetry. Many studies have shown that even with buoyancy forcing that is symmetric about the equator, spontaneous symmetry breaking can produce a single overturning cell with intense sinking in the north. This occurs b...

1. introduction the position of iran in the subtropical region that has made its arid and semiarid climate and the topographic diversity changes this trend of climate. therefore, climate hazards such as frost, flood, dust storm, drought, temperature anomalies, heavy rainfall, avalanches, snow, sleet, etc occur in iran. the northwest of iran experiences the above conditions following the arrival...

This paper develops a Ricardian model with money to study North-South trade that is mediated by the currency of the North. The model shows that an increase in the supply of Northern money results in inflation being “exported” to the South. The increase in the supply of Northern money also has real effects: (1) it transfers real resources from the South to the North, lowers the wage rate in the ...

background: neural tube defects (ntds) including spina bifida and anencephaly are the second most common birth defects with 2.8 per 1000 births in northern iran. objectives: this study was conducted to determine the risk factors of neural tube defects in gorgan, north of iran. patients and methods: this hospital-based, case-control study was carried out on all ntd-affected pregnancies (n = 59) ...