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Nikbakht M.,Afarideh H.,Ghergherehchi M. 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.12
A low-energy dielectric loaded accelerator with a non-uniform, multi-segment structure is studied and optimized. So far, no analytical solution is provided for such structures. Also, due to the existing nonlinear behavior and a large number of geometric parameters, the problem of numerical optimizations is complex. For this reason, a method is presented to design and optimize such structures using the Genetic Algorithm (GA). Moreover, the GA output results are compared with Trust Region (TR) and Nelder-Mead Simplex (NMS) methods. Comparative results show that the GA is more efficient in achieving optimization goals and also has a higher speed than the two other methods. Finally, an optimized accelerating tube is integrated into a proper coupler. Then, the accelerator is simulated for full electromagnetic investigations using the CST suite of codes. This design leads to a structure with a power of about 80 kW in the X-band, which delivers electrons to the output energy in the range of 300e459 kV. The length and outer diameter of the accelerating tube obtained are 10 cm and 1 cm, respectively.
Roya, Nikbakht,Abbas, Bahrampour Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.2
Colorectal cancer is one of the most common cancers. The aim of this study is determination its trends in Kerman province and individual cities separately until year 2016. This analytical and modeling study was based of cancer registry data of Kerman University of Medical Sciences, collected during 2001-2010. Among 20,351 cancer case, 792 were colorectal cancer cases in age group 18-93 years with a mean of 59.4 and standard deviation of 15.1. By applying time series and data trends, incidences were predicted until 2016 for the province and each city, with adjustment for population size. In colorectal cases, 413 (52%) were male, and 379 (48%) were female. The annual increasing rate in Kerman province overall was and can be expected to be 6%, and in the cities of the province Rafsanjan, Bardsir, Bam, Kerman, Baft, Sirjan, Jiroft, Kahnuj and Manujan had an increasing range from 5 to 14% by the year 2016. But in Ravar, Zarand and Shahrbabak reduction in rates of at least 2% could be predicted. The time series showed that the trend of colorectal cancer in female will increase 15% and in male 7% by year 2016. Given the trend of this cancer is increasing so that resources will be consumed in the treatment of the patients, efforts shoudlbe focused on prevention and early diagnosis of the disease. Screening could have an important role leading to improved survival.
Mahdi Nikbakht,Fariba Behrooz Sarand,Rouzbeh Dabiri,Masoud Hajialilue Bonab Techno-Press 2024 Advances in materials research Vol.13 No.1
Presented Article evaluates the effect of nanoclay on permeability, compressive strength, and plasticity behavior of fine-grained soil related to the Tabriz landfill site. In this regard, comprehensive experimental study was performed on taken soil samples (42 specimens) with aim of design high-performance liners for Tabriz landfill. The samples was mixed by 0% (control) 3%, 6% and 9% nanoclay and prepared in 1, 7, 14 and 28 days before testing stage. Index tests like particle-size, permeability, atterberg limits, and uniaxial compressive strength (UCS) was conducted on samples. The results show that studied soil is classified as CL in USCS classification and atterberg limits measured as LL is 37, PL is 20.67, and PI is 16.33 which increase into 75, 45, and 30. The assessment presented the LL was increased about 20.27% based on increasing in nanoclay from 0% to 9%. These variations for PL and PI were 21.77% and 18.37%, respectively. Also, the and soil's compressive strength is increase from 120 kPa to 188 kPa and permeability is estimated as 4.25×10<sup>-6</sup> m/s which reduced into the 6.34×10<sup>-9</sup> m/s with respect the naboclay content increases form 0% to 9%.
Informed Consent: A Complex Process in Iran’s Nursing Practice
Alireza Nikbakht Nasrabadi,Mahboobeh shali 한국간호행정학회 2017 간호행정학회지 Vol.23 No.3
Informed consent should not be regarded as a rigid process. Instead, it should be regarded as a flexible process that provides patient with the right amount of information required to facilitate meaningful decision-making. Informed consent is an important ethical and practical part of patient care. Understanding the moral foundation of informed consent can help to guide therapists in their communication with all patients. Nurses, as members of the multidisciplinary team, are currently key contributors in providing information to patients regarding the treatment process. But in this process, there are some challenges that make it difficult. This paper describes the underlying ethical and regulatory requirements as well as related challenges regarding informed consent in the context of a nursing practice in Iran.
Informed Consent: A Complex Process in Iran's Nursing Practice
Nasrabadi, Alireza Nikbakht,shali, Mahboobeh Korean Academy of Nursing Administration 2017 간호행정학회지 Vol.23 No.2
Informed consent should not be regarded as a rigid process. Instead, it should be regarded as a flexible process that provides patient with the right amount of information required to facilitate meaningful decision-making. Informed consent is an important ethical and practical part of patient care. Understanding the moral foundation of informed consent can help to guide therapists in their communication with all patients. Nurses, as members of the multidisciplinary team, are currently key contributors in providing information to patients regarding the treatment process. But in this process, there are some challenges that make it difficult. This paper describes the underlying ethical and regulatory requirements as well as related challenges regarding informed consent in the context of a nursing practice in Iran.
Trend Analysis of Gastric Cancer Incidence in Iran and Its Six Geographical Areas During 2000-2005
Haidari, Mohmmad,Nikbakht, Mohammad Reza,Pasdar, Yahya,Najafi, Farid Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.7
Objective: gastric cancer is the fourth most common cancer worldwide. While it is one of the most common cancers in Iran, there are only limited data regarding incidence trends in the country. This study is the first of its type to investigate trends across six geographical areas during 2000-2005 using cancer registry data. Materials and methods: The registered data for gastric cancer cases in National Cancer Registry System were extracted from the Ministry of Health and Medical Education, Center for Disease Control & Management, code C16. First, according to WHO population, the sex-standardized incidence rate in both sexes and then the trends of incidence rate during 2000-2005 were investigated separately for different geographical areas of the country. Results: the incidence rates of gastric cancer in Iran and its six geographical areas during 2000-2005 were increasing albeit with differences in their slopes. The overall incidence rate increased from 2.8 in 2000 to 9.1 per 100,000 persons per year in 2005, rising from 4.1 to 13.2 in men. The average six-year incidence of gastric cancer in the central and northwestern border of Caspian Sea was 7.8 per 100,000 persons per year, while it was 0.9 per 100,000 persons per year in the border of the Persian Gulf. Generally the incidence rate in men was higher than in women. Conclusion: Iran is one of the high-risk areas for gastric cancer. Increase in incidence might continue in the future partly because of improvement in cancer registry systems as well as increase in risk of this cancer.
Effect of Sodium Cromoglycate on Acetic Acid-induced Ulcerative Colitis in Mice
Zahra Ghafouri,Saeid Seyyedian,Jafar Nikbakht,Ebrahim Kouhsari,Sara Bayat,Hamidreza Zargar,Gholamreza Houshmand 대한소화기학회 2020 대한소화기학회지 Vol.75 No.1
Background/Aims: Ulcerative colitis (UC) is a type of inflammatory bowel disease that mainly involves the colon. Thus far, glucocorticoids and amino-salicylate have been the main treatment. Methods: To assess drugs with fewer side effects, this study evaluated the effects of sodium cromoglycate (SCG) on acetic acid-induced UC in rats. The treatment groups included SCG receivers (50 and 100 mg/kg, intra-orally) and sulfasalazine (SSZ) receivers (100 mg/kg, intra-orally). The colonic mucosal injury was assessed by clinical, macroscopic, and histopathological examinations. Results: In the treatment groups with 50 and 100 mg/kg of SCG, the clinical activity score decreased to 2.67±0.18 and 1.73±0.21 (p<0.05), respectively, compared to the UC control group (3.21±0.31), and were higher than that of the group given the standard treatment of 100 mg/kg SSZ (1.10±0.09). The treatment groups with 50 and 100 mg/kg of SCG showed a lower clinical gross lesion score than the UC control group (2.91±0.28 and 2.10±0.43, vs. 4.49±0.61, p<0.05) and were higher than the standard group (0.95±0.18). Treatment with SCG (100 mg/kg) decreased the macroscopic scores significantly compared to the UC control group (p<0.05) on the 8th day. Conclusions: SCG (100mg/kg) decreased significantly the clinical activity score, gross lesion, and percentage-affected area compared to the UC controls on the 8th day.