فهرست مطالب حامد زمانی

Background and objective:

 Transferring injured people to medical centers is one of the important challenges of providing relief in natural and man-made disasters. Often, due to the damage caused by the disaster, it is not possible to transfer the injured to safe medical centers in the short term. Establishing field hospitals in suitable places is one of the common solutions in these situations. This study aims address the problem of location selection for field hospitals using mathematical modeling and asses how to allocate resources, including medical staff and needed medications by the temporary hospitals.

Method :

This study presents an integer programming model for the location selection problem. To evaluate the proposed model, the real data from Amol City was collected and used as inputs. The optimal solution was determined using GAMS 25.1 optimization software.

Results:

 The calculation results illustrated the best place for the establishment of field hospitals, which is located in Banafsheh Park. It has also been determined that each deployed field hospital should have 60 beds. In addition, the optimal number of medical personnel and relief vehicles for relief operations was determined. The sensitivity analysis has also shown that if any of the hospitals located in Amol is damaged and inactive due to an accident, Hefdeh Shahrivar Square is a suitable place to build a field hospital. 

Conclusion:

 The results of this study can help authorities in Amol city to make the best decisions regarding where to establish field hospitals and how to use the limited available resources during disasters. The main innovation of the presented model also is the location of field hospitals along with considering the active hospitals around the affected areas so that the injured can be transferred to the active hospitals in addition to the constructed field hospitals. In this model, a constraint has been applied to complete the service time, so that the rescue vehicles have a limited time to transport the injured to the rescue centers.

The aim of this study was to investigate the radiation protective effect of daily oral consumption (for one week/one month) and single oral dose of green tea extract against gamma irradiation in mice.

This study was performed on 60 adult male Balb/c mice weighing 25 to 30 gr in 6 equal groups. These groups include control, only irradiated, daily consumption of 200 mg/kg of green tea extract for one week and without irradiation, irradiated group after consumption of 200 mg/kg extract for one week, irradiation after 200 mg/kg oral consumption of green tea extract for one month, and irradiation 2 hours after eating 800 mg/kg of green tea extract.

The results demonstrated that the oral consumption of green tea extract before irradiation significantly decreased MnPCE (51% decrease, P<0.0001) and MnNCE (28% decrease, P<0.05), and increased PCE/PCE + NCE ratio (12% increase, P<0.0001) compared to the only-irradiated group. The percentage of DNA in tail and apoptotic comets decreased significantly with consuming green tea extract (continues or single dose) (P<0.001).

Oral consumption of green tea extract in both single and continuous doses had radiation protection significantly, and these effects were more in the case of continuous consumption than single consumption.

Assessing the educational program relevance to job requirements can help identify its weaknesses and foster an opportunity for its improvement. Radiology experts play a vital role in disease diagnosis. The objective of this study was to investigate the viewpoint of radiology graduates about the coordination of the curriculum of Radiology BSc with their professional needs.

This descriptive cross-sectional study was performed on 134 graduates of radiology BSc Working in Medical Imaging centers of Hamedan, Kermanshah, Kurdistan, Ilam, and Lorestan in the academic year 2018. In each province, 20% of the population of radiology technologists was selected via simple random sampling. Data were collected through a questionnaire that included demographic information and survey questions about the application of the main courses in this field in job responsibilities. The data were analyzed using descriptive statistics (mean, standard deviation, frequency, percentage).

Based on the job needs, the current curriculum had varying levels of application. The highest application rate was in specialty courses (4.04±0.7), and the lowest rate was in basic courses (3.08±0.9). The results revealed that the appropriate courses are Anatomy 1-3 (4. 6±0.7), and Radiographic positioning and procedures 1-3 (4.6±0.8) in specialty courses, and radiographic positioning and procedure in training units (4.2±0.6). Ultrasound physics and Seminar in specialty courses, and Statics and general mathematics in basic courses had the least conformity with professional needs with 3.15±1.5, 2.7±1.3, 1.8±0.7, and 2. 1±0.9, respectively. According to the results of this study, the graduates of this discipline had an average satisfaction level (3.26) with the contents of their academic program.

The findings indicated that the didactic content of radiology BS is somewhat coordinated with the job requirements of this field. However, the curriculum should be revised to improve its applicability for future employees.

Seed is the fundamental input of crop production and tobacco is cultivated as transplanting and its transplant produced as float system. Therefore, seed germination and produced seedling health and diseases and pests management have high importance. So, evaluation of seeds dressing effect on germination and important pests and diseases management in the nursery for healthy transplantable seedling production is important. The study aims to investigate the effect of disinfectant of K326 tobacco seed on germination and percentage of transmissible transplants and management of contamination of sciaridae fly, aphid, and collar rot in a float system tray.

This study was conducted as a completely randomized design in 3 replications at Tirtash Research and Education Center in 2014. seeds dressed by pelleting apparatus disinfected with Metalaxyl (Ridomil) and Thiophanate–methyl (TopsinM) fungicides and Imidacloprid (Gaucho), Thiamethoxam (Confidor) and Thiodicarb (Larvin) insecticide and seeds heating by 60ºC temperature warm air during 1 hour, seeds treatment by 50ºC heat water for 10 minutes and treatment by 0.5 percent concentration sodium hypochlorite for 4 minutes. Then normal seedlings percent by standard germination test, seedling emergence percent in float system, transplantable seedling of float system and infected to Sciarid fly, aphid and stem rot seedlings determined.

Results showed that K326 Tobacco Seeds Disinfected by 2.5 g/kg metallaxyl + 2.5 g/kg thiophane-methyl (70% wettable powder) + 10 g/kg imidacloprid + 6 cm3/kg Thiodicarb had the highest percentage of normal seedlings, percentage of seedling emergence in the float system tray and percentage of removable transplants and the least seedling contaminated with sciaridae, aphid and collar rot.

Results of this study showed that all seed disinfection treatments improved seed germination, seedling emergence percentage, and removable seedlings in the float system tray as well as infected seedlings compared to control decreased collar rot, sciaridae fly, and aphids. Also, the mentioned traits were superior to the non-chemical disinfectant treatments in seed disinfection treatments with the studied fungicides and insecticides.

Targeted radiopharmaceutical therapy is one of the most common methods for relieving pain in patients with bone metastasis. In this type of treatment, the bone marrow absorbed dose, as a critical organ, needs to be considered as a limiting factor. Until now, beta-emitter radiopharmaceuticals have been considered for this treatment modality, which one of the most commons is samarium-153-ethylene diamine tetramethylene phosphonate (153Sm-EDTMP), but recently the radium-223-dichloride (223Ra-Cl2) alpha emitter radiopharmaceutical has been approved by the US Food and Drug Administration (FDA). The aim of this study was to compare the bone marrow absorbed dose of 153Sm-EDTMP and 223Ra-Cl2 radiopharmaceuticals.

In this study, a lumbar vertebral bone phantom was used for simulation. The radiopharmaceuticals were distributed in the phantom, and the simulation was performed using the GATE Monte Carlo toolkit. After estimating the absorbed dose per decay in different parts of the phantom, the absorbed dose of radiopharmaceuticals in the bone marrow of a patient with 70 kg weight, was calculated using the Medical Internal Radiation Dosimetry (MIRD) method.

For 153Sm-EDTMP, the bone marrow absorbed dose was equal to 9.60 Gy for the administered activity of 2590 MBq. For 223Ra-Cl2, the bone marrow absorbed dose was calculated as 0.83 Gy for administered activity of 3.85 MBq.

Due to the lower bone marrow absorbed dose by 223Ra-Cl2 alpha emitter radiopharmaceutical, the use of this radiopharmaceutical as an alternative to 153Sm-EDTMP beta emitter radiopharmaceutical is recommended for palliative therapy of patients with bone metastasis.

170Tm-EDTMP has been proposed as a radiopharmaceutical with desirable properties and an alternative to 89Sr-Cl2 for the palliative treatment of patients with bone metastasis. This study aimed to calculate the absorbed dose of 170Tm-EDTMP in the bone of patients with bone metastasis.

In this study, an adult human femur phantom and the GATE Monte Carlo toolkit were used for simulation. 170Tm-EDTMP was distributed in the bone compartment, and the absorbed dose per disintegration was calculated in the different phantom compartment. In order to comparison and validation of results, simulations with similar conditions were performed for 89Sr-Cl2. Then, the absorbed dose per administered activity of radiopharmaceuticals in the bone and bone marrow was calculated using the MIRD method and compared with each other.

The bone absorbed dose per administered activity for 170Tm-EDTMP was 5.52 times higher than 89Sr-Cl2, while the bone marrow absorbed dose by 170Tm-EDTMP was 2.11 times higher than 89Sr-Cl2.

According to the results obtained in this study, 170Tm-EDTMP is a suitable radiopharmaceutical for use in the palliative treatment of patients with bone metastases. However, in order to further investigation, there is a need for clinical trial in the patients.

Panoramic radiography and cone-beam computed tomography (CBCT) are the two methods used widely in dental radiology. In this research, the mean dose-area product (DAP) for two groups including adult and pediatric (5-10 years old) was compared in the two methods.

 In this experimental study, the data from 251 patients of seven panoramic systems and one CBCT system related to Shahid Sadoughi University of Medical Sciences (Yazd Province, Iran) was investigated. For each patient, the information including DAP values and other scan parameters for the two age groups were evaluated.

 The mean value of DAP in panoramic and CBCT systems in adult groups was 91.22 ± 6.47 and 943.8 ± 8.96 mGy.cm2</sup>, respectively. This value in pediatric groups was 55.4 ± 13.5 and 63 ± 0.0 mGy.cm2</sup>, respectively. The average of DAP value in the CBCT method in adult and pediatric groups was higher about 9 and 12 folds, respectively, compared to the panoramic examination. In addition, this value was higher significantly in adult patients in comparison to pediatrics (P < 0.05).

 Due to the wide and high exposure parameters in CBCT than panoramic, the DAP value from this method was higher especially in pediatric patients. Therefore, clinicians should consider their attention in requesting CBCT.

The pictorial representation processes are of the most problematic, and at the same time, important issues that we face to in visual arts. Many thinkers have spoken about them and each of them has seen this issue from some point of view and presented some theories, and each of these theories has also set out some discourse and resulted in the other discourses that sometimes are very constitutional. Needless to say, such a breadth requires us to deal with the common ground of some numbers of the most fundamental of these insights. What is done in this essay is the consideration of some of the most important of these theories based upon the Charles Sanders Peirce’s semiotics, so as to find out whether we can find some common ground, while not so much limited, between these theories and whether we finally can identify some particular kind of audience. The result is that the theories under our discussion introduce some particular audience to us who is the reactive audience and can’t make any change in the picture before her. Then these theories, with all of the trivial and important differences they have, tell us about an audience’s subjective states who doesn’t want to roll up the sleeves and transform or transpose the representational relationships. She is the one who is accustomed to thinking and as though this thinking never is to be resulted in some physical action. The reactive audience who can’t or don’t want to change anything, in the eyes of each of these theories has a particular personality. In some of them, she is imaginative, and in some others is down-to-earth and rational someway. Some see her as somebody who is shifty and has an obscure mindset. We would set up a study based upon the Kith Kenney’s categorization concerning representation theories which itself is based upon the Peirce’s point of view about the signs, and we must say that the distal task is to lend weight to existence of some common ground between the sign-based theories. We would organize the theories which Kenney observes and add them some other perspectives, and in some cases go deep into the concepts and noise out some more details about them as much as possible so as to find out whether Kenny has overlooked some prospects -and that in our view is the case. We would make the case for some similarities between these theories and capture that our brother’s brain that seems to be intricate, is near enough simple really. The proximal task then is to focus upon the main mood of these theories which in turn speaks for the conceptions incepted and conceived through some normal person’s mind. Thus our discussion is mainly concerned with the notions regarding the indivisuals whose mental states are under our scrutiny. As you would see, each of these theories are fit into the Kenney’s categorization with an eye to the main elements of them in constitutive relation to the kinds of the sign, but these encapsualtions are not decisive anyway, and we point to this issue now and then somehow.

In order to investigate the effects of different irrigation regimes on yield quantity and quality of flue-cured tobacco cv. K326, an experiment was carried out based on a randomized complete blocks design (RCBD) with three replications, at Tirtash Tobacco Research Center, in 2011. Treatments were combination of W1= 40%, W2=60%, W3=80%, and W4=100 percent crop water requirement with D1=5, D2=10, D3=15 days irrigation interval with two control treatments (without irrigation (R) and furrow irrigation (I)). The results showed that treatment W4D1, W4D2, W4D3, W3D1, W3D2, W3D3, W2D1, and W1D1 had statistically significant difference with the other treatments and had more dry leaf yield. Also, the minimum leaf chlorine content was observedin W4D2, W3D1, W2D1, W2D2, W1D3, and Rtreatments. Under W4D2, W3D1, W3D3, W2D1, W1D1, W1D2, and W1D3 treatments, tobacco had statistically significant difference with other treatments and had higherprice. Also, the minimum gross income was obtained under W2D2, W2D3, W1D3, I, and R Treatments.

In order to Study on effect of pelleting on flue-cured tobacco (Nicotiana tobacco L.)K326 cultivar various seed size germination and seedling emergence,  this research conducted at Tirtash Tobacco Research and Education Center (in Behshahr) in 2014 by employing pan coater pelleting machine based on completely randomized design by four replication. First, seeds were cleaned and then primed by KNO3three percent concentration solution. Consequently, seeds pelletedby a composition of insecticide and fungicidesand a powder containing various materials. Pelleted seeds after drying, by 1, 1.5 and 2 mm round holesieves separated to three seed diameter size and in companion with crud (naked) and pelleted in other country seeds were experiment treatments. Also for evaluating effect of storage duration effect on studied traits, seeds stored for one year in 10centigrade degree. Normal seedlings percent immediately and one year after pelleting andcoefficient of velocity of germination immediately after seeds pelletingby standard germination test and seedling emergence percent in nursery immediately and one year after seeds pelleting were determined.Results showed, two mm diameter pelleted seeds had the lowest normal seedlings percent and seedling emergencepercent in nursery immediately and one year after seeds pelleting and coefficient of velocity of germination immediately after seeds pelleting. Also, the most amounts of this traits belonged to not pelleted seeds and pelleted seeds germination ability and seedling emergence did not significantly decreased after one year after pelleting. Based on this research results pelletted seed with 1.5mm diameter had better germination ability and seedling emergence