This paper tries to determine an optimum condition for the flotation operation of the Alborz-Sharghi coal washing plant. For this purpose, a series of comprehensive experiments have been conducted on representative samples from feed of the flotation system of the plant. Four operational variables such as the collector dosage (Fuel oil), the frother dosages (MIBC), the pulp density percent and t...

Hydraulic fracturing is one of the most common methods of well stimulation for reservoirs with low permeability. Hydraulic fracturing increases the flow capacity, alters flow geometry, bypasses damage and improves recovery factor. The pressure of most of Iranian oil reservoirs is declined and consequently the production is reduced. It is necessary to improve the production by using new stimulat...

ventilation tube (vt) insertion is the most common otologic operations performed in children, which has great importance in recovery and prevention of hearing loss in children with eustachian tube dysfunction in critical ages of growth development. the location of the vt insertion varies in different studies; the differences are in recovery rates and sequelae of vt insertion. this study is perf...

introduction one of the most important pre-processing steps in optical coherence tomography (oct) is reducing speckle noise, resulting from multiple scattering of tissues, which degrades the quality of oct images. materials and methods the present study focused on speckle noise reduction and edge detection techniques. statistical filters with different masks and noise variances were applied on ...

one of the goals of financial reporting is to provide the useful information in order to facilitate the decision making. accounting information system is of high importance for the users to make specific decisions. the information should be analyzed to present the valuable information to the investors so that in this paper, the relative content and return additive with cash recovery have been a...

background: platelet preparations have been used for a wide variety of clinical applications such as hemorrhage, tissue engineering and cellular therapy. platelet concentrates can be prepared by the apheresis method or from the whole blood using the buffy-coat or platelet-rich plasma methods. the purpose of this study was to compare four variations of platelet-rich plasma method based on double...

Disaster recovery is an important means to ensure business continuity. However, the disaster recovery investment is so huge that the cloud disaster recovery becomes a best choice for enterprises, especially for SMEs. This paper discusses the necessity and importance of the cloud disaster recovery center and the vital indicators of disaster recovery by analyzing the classification and selecting ...

In Nazi Germany (1933–45), reclaiming waste became an intrinsic component of the regime’s economy as well its ideological, racial, and expansionist ambitions. National Socialist interventions into streams began in 1934 with salvage campaigns. The state then brought urban policies municipal services under control, restructuring ‘Aryanising’ trade. Moreover, both consumers producers were prompted...

This paper describes laboratory scale experiments examining the impact of microwave irradiation on the Granular Activated Carbon (GAC) exposed to toluene, a common organic vapor frequently released into work environment as well as outdoor. A stream containing 300 ppm toluene was supplied and passed through the granular activated carbon. The saturated adsorbent was placed in a quartz glass r...