Showing 6 results for Osce
Volume 4, Issue 5 (12-2015)
Abstract
The common pistachio psylla Agonoscena pistaciae is a key pest of pistachio in Iran. A study was conducted to determine the spatial distribution ofpsyllanymphs and eggs in a 10 ha pistachio orchard in the Rafsanjan region, southeast of Iran. Three rows, each containing 33 trees (totally 99 trees), were randomly selected in the orchard based on a stratified sampling scheme. In each of the selected trees, three positions in the crown (top, middle and bottom) were considered. One leaf from each position as sampling unit (totally 297 samples) was clipped and number of nymphs and eggs were counted. Ordinary kriged maps were achieved for nymphs and eggs of the three positions using a variogram function. Results indicated the highest and lowest density of the nymphs occurred on the top and bottom positions of the crown, respectively. Eggs of the common pistachio psylla were laid mostly on the bottom of the pistachio crown.
Volume 6, Issue 3 (6-2021)
Abstract
Aims: MusculoSkeletal Disorders (MSDs) are one of the most common problems of students which if not prevented and treated can lead to physical and psychosocial disorders.The aim of this study was to compare MSDs in two groups of students with special needs who suffering from low vision and hearing impairment.
Method and Materials: A cross-sectional study was conducted with of 62 students aged between 10-15 years old in Hamadan in 2019-2020 . Of these participants, 32 students living with hearing impairment and 30 students living with low visions. Demographic questionnaires and Nordic musculoskeletal disorders were used to collect data. SPSS software version 23 was used to analyse data through two-sample independent t-test, chi- square test and logestic regression.
Finding: Tottaly 62 students took part in the study. The mean age of Low Vision Students( LVS) and Hearing Impairment Students (HIS) was 12.101.47± and 12.47± 1.64 years respectively. Of all students with low vision 10 individual (33.3%) and of all students with hearing impaiement 10 individuals (31.3%) were suffering from MSDs. The most MSD affected areas in HIS was lumbar (15.6%) and in LVS was shoulder (16.7%). The results showed that MSDs did not differ significantly between the two groups of LVS and HIS (P> 0.05).
Conclusion: This study showed that at least one-third of LVS and HIS suffered from MSDs. The need for therapeutic and educational strategies in the field of ergonomics interventional program for health promoting of these students with special needs should be considered.
Volume 10, Issue 3 (6-2021)
Abstract
Pistachio psylla, Agonoscena pistaciae Burkhardt & Lauterer (Hem.: Psyllidae) is one of the most important pests of pistachio orchards in Iran. The application of chemical pesticides early in the growing season until harvest has affected farmers’ and consumers’ health. In this research, the efficacy of arugula Eruca sativa cold press seed oil, methanolic spinach Spinacia oleracea seed extract, and dayabon® (SL 10%) was studied against nymphs and adults of pistachio psylla in a laboratory at 26 ± 2 °C, 65 ± 5% RH, and photoperiod of 16: 8 (L: D) h. LC50 values of nanoemulsion formulation (NEF) of spinach seed extract and its nonformulated extract on the early nymphal stage were 468 and 4381 mg/l, respectively. In contrast, the LC50 value of arugula seed oil and dayabon was 2281 and 4380 mg/l, respectively. NEF of spinach seed extract (LC50 = 124 mg/l) was significantly more toxic than other compounds against the 5th nymphal stage. There was no significant difference in nonformulated spinach seed extract (LC50 = 3946 mg/l), arugula seed oil (LC50 = 3189 mg/l) and dayabon (LC50 = 3930 mg/l) against 5th instars. The efficiency of dayabon and arugula seed oil and a chemical pesticide fenitrothion was studied in the field located in Dehmolla County, Shahrood, Iran. Sampling was carried out before and after treatment. There were no significant differences between days after treatments. It means that the botanicals were effective until 21 days after treatment. Findings indicated that botanical pesticides used in this study could be effective against pistachio psylla.
Nafiseh Behradmehr, Mehdi Ahrari,
Volume 21, Issue 3 (7-2014)
Abstract
In general, energy prices, such as those of crude oil, are affected by deterministic events such as seasonal changes as well as non-deterministic events such as geopolitical events. It is the non-deterministic events which cause the prices to vary randomly and makes price prediction a difficult task. One could argue that these random changes act like noise which effects the deterministic variations in prices. In this paper, we employ the wavelet transform as a tool for smoothing and minimizing the noise presented in crude oil prices, and then investigate the effect of wavelet smoothing on oil price forecasting while using the GMDH neural network as the forecasting model. Furthermore, the Generalized Auto-Regressive Conditional Hetroscedasticity model is used for capturing time varying variance of crude oil price. In order to evaluate the proposed hybrid model, we employ crude oil spot price of New York and Los Angles markets. Results reveal that the prediction performance improves by more than 40% when the effect of noise is minimized and variance is captured by Auto-Regressive Conditional Hetroscedasticity model.
Hasan Sawari, Jabbar Aslani, Khabbat Aslani,
Volume 21, Issue 4 (10-2014)
Abstract
According to the preamble of the Framework Convention for the Protection of National Minorities (which entered into force on February 1, 1998) minority rights are an integral part of fundamental human rights.
universal level that taken on great importance in addressing the challenges of minority protection in evolving and increasingly diverse societies. So, this survey has an analytical approach to the protection of minorities within the Council of Europe and for this, especially, focuses on the Framework Convention: namely its content, its rights-holders, and also- the most important point of view- the problems, challenges and tasks that this legally instrument faces with it in practice. One must take into account that the Framework Convention has passed 13 years of its born and the authors aim to analyze its achievements and in the same time, its challenges as well. Thus, we reiterate once more that our method is analytic to examine the topic.
Volume 23, Issue 3 (5-2021)
Abstract
The common pistachio psylla, Agonoscena pistaciae Burckhardt and Lauterer (Hem: Aphalaridae) is one of the main and most destructive pests of pistachio orchards in Iran. Chemical control is a widely applied method to manage this pest problem. The intensive use of insecticides has led to the development of resistant populations of the common pistachio psylla. In this research, the activities of detoxifying enzymes (general esterase, glutathione S-transferase and cytochrome P450) were assessed against two populations of the common pistachio psylla, and the coccinellid predator, Oenopia conglobata L. (Col: Coccinellidae) in Kerman Province, under treatment of three rational insecticides, namely, acetamiprid, spirotetramat, and hexaflumuron in four concentrations (control, LC25, LC50 and LC75). The results indicated that the activities of detoxifying enzymes were higher in the resistant population of psylla compared to the susceptible one. Esterase was the predominant detoxifying enzyme in the pest and its predator. Based on the results, the activity of detoxifying enzymes were higher at the higher concentrations of the pesticides. Esterase activity was greater in the psyllid populations than the coccinellid predator; which may indicate a higher sensitivity of the lady beetle to insecticides than its prey.