نتایج جستجو برای: ecsi model

تعداد نتایج: 2104321  

Journal: :journal of biostatistics and epidemiology 0
mahboubeh rasouli department of biostatistics, public health school, iran university of medical sciences, tehran, iran mahmoodreza ghadimi department of statistics, iranian social security organization, tehran, iran masoomeh shohani department of nursing, faculty of allied medical sciences, ilam university of medical sciences, ilam, iran asieh ashouri guilan interventional cardiovascular research center, heshmat hospital, guilan university of medical sciences, rasht, iran samaneh hosseinzadeh department of biostatistics, university of social welfare and rehabilitation sciences, tehran, iran kazem mohammad department of epidemiology and biostatistics, school of public health, tehran university of medical sciences, tehran, iran

background & aim: esophageal cancer is one of the main common causes of death. the high prevalence of esophageal cancer in northern iran is an important public health problem. the main aim of this paper was to assess the factors affecting survival of  atients with esophageal cancer in neighbor provinces around the caspian sea using weibull mixture cure model and mixture cure model based on a no...

Journal: :تحقیقات نظام سلامت 0
علیرضا مصداقی نیا استاد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. فروغ واعظی دانشیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. عماد دهقانی فرد گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران امیرحسین محوی استادیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. کاظم ندافی دانشیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. محمود علی محمدی استادیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. رضا قنبری

background: despite their simplicity and the low-cost, the conventional non-contact uv systems have low efficiency in water disinfection. the purpose of this study was to examine the possibility of upgrading these systems by some modifications in order to maximize the water contact with the uv radiation and as a result a better disinfection.    methods: in this study, two enhanced models of non...

Journal: :health in emergencies and disasters quarterly 0
negar pourvakhshoori kian norouzi fazlollah ahmadi mohammadali hosseini hamidreza khankeh

introduction: since nurses are the largest group of health care providers playing an important role in responding to disasters, evaluating the state of nursing and nursing knowledge about common patterns of disasters is undeniable in importance and necessity. however, based on studies conducted by researchers, there are few models for nursing that show nurses’ disaster readiness. this study was...

Journal: :journal of artificial intelligence in electrical engineering 0

in this paper the real time operation of an automatic teller machine (atm) is analyzed using atimed petri net (tpn) model. in the modeling, the probability of arrivals, the speed andattentiveness of customers (clients) are taken to account. different parameters are based onthe statistical data. the model is simulated for 24 hours. the diagrams of number ofsucceeded customers, failed references ...

Journal: :the journal of tehran university heart center 0
drissi boumzebra jan otto solem shaheen nakeeb zohair al halees

background: a good animal model for coronary surgery experiments has been difficult to establish. an ideal model should have the closest morphological resemblance to human beings. the objective of this study is to establish sheep as a model for these experiments. methods: the anatomical aspects of left anterior descending coronary artery (lad) and right internal thoracic artery (rita) in the sh...

Akram Khani Farahani, Ali Mohades Majid Sheshmani

The purpose of this study was to examine the expected returns of Carhart model compared to the capital asset pricing model and the implicit capital cost model based on cash and capital returns of growth and value stocks. The statistical population consisted of the companies listed in Tehran Stock Exchange and the time domain is between 2007 and 2016. By choosing Cochran sampling, 126 companies ...

Hamidreza Foladmand Haneyeh Mazloom,

Infiltration process plays an important role in water cycle of the nature. Conducting field experiments is necessary to determine the coefficients of infiltration equations due to the dependence of these coefficients to the soil type, soil surface conditions and the amount of initial soil moisture content. This study has been carried out in a field located in Islamic Azad University, Marvdasht ...

Hamidreza Foladmand Haneyeh Mazloom,

Infiltration process plays an important role in water cycle of the nature. Conducting field experiments is necessary to determine the coefficients of infiltration equations due to the dependence of these coefficients to the soil type, soil surface conditions and the amount of initial soil moisture content. This study has been carried out in a field located in Islamic Azad University, Marvdasht ...

Journal: :acta medica iranica 0
nahid dehghan nayeri department of nursing, nursing and midwifery care research center, tehran university of medical sciences, tehran, iran. abbas hooshmand bahabadi department of nursing, tehran university of medical sciences, tehran, iran. anoshirvan kazemnejad department of biostatistics, faculty of public health, tarbiat modares university, tehran, iran.

one of the main objectives of quantitative researches is assessment of models developed by qualitative studies. models validation through their testing implies that the designed model is representative of the existed facts. hence, this study was conducted to assess the clinical nurses' productivity model presented for iranian nurses' productivity. the sample of the study consisted of 360 nurses...

Journal: :bulletin of the iranian mathematical society 2013
j. baldwin t. hyttinen m. kesala

we study the history and recent developments in nonelementarymodel theory focusing on the framework of abstractelementary classes. we discuss the role of syntax and semanticsand the motivation to generalize first order model theory to nonelementaryframeworks and illuminate the study with concrete examplesof classes of models. this second part continues to study the question of catecoricitytrans...

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