فهرست مطالب farrokhi

Recognition of ore deposit genesis is still a controversial challenge for economic geologists. Here, this task was addressed by the virtue of Bayesian data fusion (BDF) implementing available proofs: semi-schematic examples with two (Cu and Pb + Zn) and three (Cu, Pb + Zn and Ag) evidences. The data, in current paper are just concentrations of indicated elements, were collected from Angouran’s deposit in Iran at prospecting and general exploration stages. BDF was used for discrimination between three geneses of Massive Sulfide, Mississippi and SEDEX types. Better genesis recognition with clear discrimination between the geneses was achieved by BDF as compared with earlier studies. The results showed that uncertainties were reduced from 50% to less than 30% and deposit recognition was improved greatly. Furthermore, we believe that using more properties can have a beneficial effect on the overall outcome. The comparison made between 2 and 3 properties showed that the amount of probable belonging values to any type of deposit was greater in 3 properties. It was also confirmed that using the completed information from the various stages of exploration progress can be amplified and be used for genesis recognition via BDF.

The egg parasitoid, Trichogramma evanescens Westwood, is used for inundative releases in biological control programs against the tomato leaf miner, Tuta absoluta Meyrick, in agro-ecosystems. One of the most important host-parasitoid interactions is functional response that its type and parameters are affected by different factors including host plant characteristics. In this research, functional response of T. evanescens to different egg densities (2, 4, 8, 16, 32, and 64) of T. absoluta was investigated in a growth chamber (26±2°C, 50±10% RH, and 16:8 hours L:D photoperiod), on three varieties of tomato (Mobil, Riogrande, and Early Urbana-703). Type of functional response was determined by logistic regression and its parameters, i.e. searching efficiency and handling time, were calculated by nonlinear regression model using SAS software. Functional response of this parasitoid was type III on Mobil and Riogrande and type II on Early Urbana- 703. Searching efficiency (a) for each host density was 0.0368, 0.0736, 0.1472, 0.2944, 0.5888, and 1.1776 on Mobil, and 0.0374, 0.0748, 0.1469, 0.2992, 0.5984, and 1.1968 h-1 on Riogrande varieties, respectively. Also, on Early Urbana-703, the attack rate was 0.1045 h-1. The handling time was 1.0276, 1.1017, and 1.3289 hours with maximum parasitism of 23.3, 21.7, and 18.06 eggs on these varieties, respectively. It is suggested that physical structure of Early Urbana-703 variety may interfere with the parasitoid’s performance, resulting in an impaired searching efficiency and parasitism ability. Some applied aspects of the findings are discussed.

The present article, while examining the theoretical foundations and concepts of Qualification, deals with the history of the system of Vocational Qualification in the world, the scope, and typology of different types of Qualification frameworks in detail. The methodology of this research is descriptive-exploratory and is of applied research type. The required data and information have been collected and processed by the library method and referring to written and internet scientific and organizational documents. The analysis was performed with the help of secondary analysis and based on lived experience and data and categorized information available in both existing and expected situations. The statistical sample consisted of 34 valid scientific sources, mainly foreign and organizational documents, which were purposefully selected. It was found that the most appropriate framework of the Vocational Qualification Framework has a comprehensive approach arising from sectoral frameworks with the agreement of stakeholders and social partners. Also, the educational standards of the organization in terms of skill level will not have a proportional distribution with the composition and texture of the country's jobs and as a result, will not be with the National Vocational Qualification Framework. Also, the provision of governmental and non-governmental training by the organization is not appropriate for the active population of the country and will not include lifelong learning for the people of the society. Therefore, the organization needs to enrich and strengthen training standards and pay more attention to employee training for a more prominent presence within the National Vocational Qualification Framework and requires the mechanisms of the establishment of certificate equivalencing with the formal degree and accumulation and transfer of training credits.