151 research outputs found

    Zoning Zarand-Saveh watershed for artificial recharge of underground aquifers using ELECTRE method and Linear Assignment with GIS technique

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    In previous decades decision making in water management problems and selection of better option among suggested options to solve a watershed problems was only done based on economical criteria - profit in relation to cost- and on changing social and environmental criteria in to the economical criterion However today using Multi criteria decision making it is not necessary to use financial equivalent of social and environmental criteria to select the best option In fact various qualitative and quantitative criteria can be used to prioritize and select the best options for water resources management The purpose of this study is ranking the water resources potential in Zarand-Saveh watershed by two methods ELECTRE method and Linear Assignment ELECTRE method is one of the Multi criteria decision making which can compound the quantitative and qualitative criteria weight each criterion based on its importance and help decision makers to select the best option at the same time Electrical method is one of the available methods in compensatory methods In this method all options are analyzed and evaluated by non-ranked comparisons Whole stages of this method are based on coordinated and uncoordinated sets and thus it is called coordination analysi

    Selection of most appropriate area to establish soil damp for the purpose of sustainable development of water resources using TOPSIS and ELECTRE methods ( A case study: Zarand-Saveh watershed)

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    Nowadays shortage and decrease in fresh water is approximately under increased all over the world Based on the statistics published by FAO Food and Agriculture organization need for fresh water has almost become double per 21 years while useful water resources have been reduced by half in relation to 30 years ago It seems that useful water resources will become one fourth up to 2025 than useful water resources in 1960 Meanwhile danger of various pollutions for water resources frequently increased the value and importance of them Due to mentioned cases if water resources aren t managed in better way the life of human being will be threatened by the shortage of water Thus it is necessary to acquire the exact and up to date information about the condition of water resources and prediction of their situation in future in order to achieve optimum management for water resource

    Evaluating strategies for implementing industry 4.0: a hybrid expert oriented approach of B.W.M. and interval valued intuitionistic fuzzy T.O.D.I.M.

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    open access articleDeveloping and accepting industry 4.0 influences the industry structure and customer willingness. To a successful transition to industry 4.0, implementation strategies should be selected with a systematic and comprehensive view to responding to the changes flexibly. This research aims to identify and prioritise the strategies for implementing industry 4.0. For this purpose, at first, evaluation attributes of strategies and also strategies to put industry 4.0 in practice are recognised. Then, the attributes are weighted to the experts’ opinion by using the Best Worst Method (BWM). Subsequently, the strategies for implementing industry 4.0 in Fara-Sanat Company, as a case study, have been ranked based on the Interval Valued Intuitionistic Fuzzy (IVIF) of the TODIM method. The results indicated that the attributes of ‘Technology’, ‘Quality’, and ‘Operation’ have respectively the highest importance. Furthermore, the strategies for “new business models development’, ‘Improving information systems’ and ‘Human resource management’ received a higher rank. Eventually, some research and executive recommendations are provided. Having strategies for implementing industry 4.0 is a very important solution. Accordingly, multi-criteria decision-making (MCDM) methods are a useful tool for adopting and selecting appropriate strategies. In this research, a novel and hybrid combination of BWM-TODIM is presented under IVIF information

    Studying Psychological and Organizational Factors’ Roles on Occupational Accidents among Nurses and Nursing Aids in Qom, Iran

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    It is clear that safety in healthcare centres in both fields of staffs and patients is under influence of various factors and needs considering organizational and psychological variables. This study aimed to find the effects of organizational citizenship behaviour (OCB), patient safety climate (PSC) and fatalism on occupational accidents among nurses and nursing aids in one of the non-governmental hospitals in Qom, 2017. Two hundred people from the study population were selected by simple random sampling method and entered the study. A researcher-made demographics questionnaire, Williamson et al. questionnaire for fatalism and valid questionnaires for PSC and OCB were tools to gather data. The relationship between the variables was analyzed using ANOVA and T-test through SPSS V20 and structural equation was done by AMOS V8.8. One hundred and seventy-seven questionnaires out of 200 ones were entered into the analysis phase. Women with 104 (58.8%) were the most frequent and 71.8% of participants were married. Participants had an average age of 34.2(±9.37) years. Reliability of the questionnaires was acceptable. Analysis depicted effects of fatalism on occupational accidents (ÎČ=0.15), the patient safety climate on OCB (ÎČ=0.13), and OCB on occupational accidents (ÎČ=-0.13) (

    On the morphology and corrosion behavior of Ni nanostructures electrodeposited in the presence of different surfactants

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    In this work, Ni nano structures with different surface morphology have been electrodeposited from the Waths bath using direct current (DC) and pulsed reverse current (PRC) techniques in the presence of three types of surfactants. CTAB, SDS, and Triton x-100 have been used as cathionic, anionic and nonionic surfactants respectively. The surfactants concentration have been selected at below, equal to and above the corresponding critical micelle concentration (CMC). The SEM analyses show that the porosity and homogeneity of the electrodeposited samples depend on the surfactant type and its concentration. In the presence of CTAB, electrodeposition process has been certainly hindered in some region. For SDS, nano-particles with the same charges repel each other and disperse in a more uniform way. In the presence of Triton x-100, agglomeration of particles is seen and particles are not dispersed. The corrosion behavior of electrodeposited samples has also been investigated in 1 M NaOH solution using Tafel potentiodynamic polarization method as well as electrochemical impedance spectroscopy analyses. It is observed that all samples have low corrosion current density and the sample prepared above the CMC point of SDS has the lowest corrosion rate. In addition, according to our findings, the electrodeposited samples using DC method have larger particle sizes and lower corrosion rate

    The Effect of Music Therapy on Anxiety and Vital Signs of Patients with Acute Coronary Syndrome: A Study in the Cardiac Care Unit of Vali-Asr Hospital, Eghlid, Iran

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    Background: Acute coronary syndrome is an emergency situation, characterized by a sudden decrease of blood flow to the heart and chest pain during a heart attack or unstable angina. High levels of anxiety increases mortality risk up to three times. The aim of this study was to determine the effect of music therapy on anxiety level and vital signs of patients with acute coronary syndrome admitted in the coronary care unit of Vali- Asr hospital, in Eghlid city. Methods: This clinical trial was conducted on 70 acute coronary syndrome patients who were eligible for the study during 2011-2012. Anxiety level was measured by the standard Spielberger Questionnaire and vital signs of patients were recorded before and after the intervention. Data were analyzed through SPSS18 and using mean, percentage, standard deviation, independent and paired t- test. Results: Music had no effect on vital signs but significantly reduced anxiety level (P=0.049). Anxiety was significantly higher in females, but showed no significant relationship with age and education. There was no significant relationship between age, sex and education with respiratory rate, heart rate and systolic or diastolic blood pressure. Conclusions: Music as an easy and low cost intervention without any complication can be used to reduce anxiety in patients in Coronary Care Units

    ApInAPDB: a database of apoptosis-inducing anticancer peptides

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    ApInAPDB (Apoptosis-Inducing Anticancer Peptides Database) consists of 818 apoptosis-inducing anticancer peptides which are manually collected from research articles. The database provides scholars with peptide related information such as function, binding target and affinity, IC50 and etc. In addition, GRAVY (grand average of hydropathy), net charge at pH 7, hydrophobicity and other physicochemical properties are calculated and presented. Another category of information are structural information includes 3D modeling, secondary structure prediction and descriptors for QSAR (quantitative structure–activity relationship) modeling. In order to facilitate the browsing process, three types of user-friendly searching tools are provided: top categories browser, simple search and advanced search. Overall ApInAPDB as the first database presenting apoptosis-inducing anticancer peptides can be useful in the field of peptide design and especially cancer therapy. Researchers can freely access the database at http://bioinf.modares.ac.ir/software/ApInAPDB/

    Candidiasis in COVID-19 Patients

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    Based on previous studies, some comorbidities influence the morbidity and mortality of COVID-19 disease. Among these factors, opportunistic fungal infections could have a major impact on the mortality of COVID-19 patients

    Fungal Central Nervous System Infections in Patients With COVID-19

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    Recent studies have indicated that fungal co-infections have a major impact on the morbidity and mortality of patients with COVID-19. In these patients, the excessive production of inflammatory cytokines and the reduction in CD4 + T and CD8 + T cell count entails susceptibility to fungal infections.1 In addition to impaired cell-mediated immunity, comorbidities and immunosuppressive medications have a significant role in the development of fungal infections and have serious impacts on clinical outcomes.1-

    Thiamine can decrease Lactate and Creatinine level after Coronary Artery Bypass Surgery in Patients with Mild Systolic Dysfunction

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    Introduction: During cardiopulmonary bypass, oxidative stress happens in the patient's cells due to blood contact with various levels of synthetic materials. It can activate inflammatory process and release factors such as IL-6, CRP, and Neutrophils witch may hurt different organs. In recent years, many efforts have been made to prevent this type of damage, however, no single treatment has been proposed to reduce this risk. Antioxidant substances such as Thiamine is important in cell defense against free oxygen radicals. Regarding this issue, in this study, the effect of thiamine on lactate levels in patients undergoing coronary artery bypass graft surgery has been investigated.Materials and methods: In this study, 140 patients from 25 to 65 years old with mild systolic dysfunction (EF = 45-55%) who were candidates for elective CABG surgery in two groups: control and purpose (patients receiving Thiamine) were examined. All of these patients were anesthetized in an identical manner, and were subjected to a heart-lung pump. Serum lactate levels were measured before, during and 6, 12, 18, and 24 hours after surgery. All data collected in a questionnaire were recorded and evaluated using spss statistical software.Results: Study groups showed no significant differences regarding demographics and underlying diseases. Serum lactate was significantly lower in thiamine group during the first 24 hours after surgery (except before operation and 2 hours later) (p <0.05).Creatinine level in two groups before surgery was not significantly different ,However, it was significantly lower in case group 24 hours after surgery(1.54±0.14 vs. 1.24±0.19; p: 0.001).Also, dose of Inotropes in  patients who received thiamine, was significantly lower than the control group (p= 0.001). Extubation was longer in control group (15.4±4.9 vs. 13.15±4.1; p=0.003) while ICU stay was not different.Conclusion: It seems that thiamine administration before cardiopulmonary bypass, in patient with decreased left ventricular function, can decrease serum lactate as tissue perfusion marker and also improve kidney function
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