فهرست مطالب alireza hajizadeh

The purpose of this study is to present a new method of plate damage detection using the wavelet-based contourlet transform method. The contourlet transforms developed based on the Wavelet transform is a new two-dimensional transform that overcomes the limitations of the wavelet transform. The wavelet-based contourlet transform is a new family of contourlet transforms with the same two-step characteristic introduced from the same filter banks, radial, and angular decomposition. This method is used in plate damage detection for the first time. In the first step, the plate using the wavelet transform is decomposed into four sub-bands. Then, a radius decomposition with eight bands in each sub-band of the initial image is introduced using one of the directional filter banks. The radius decomposition in different directions is known as the advantage of this method in comparison with the wavelet transform. This advantage is observed in images with curved lines. In this method, the change in the elastic modulus is considered as damage in plates. The fundamental mode shape of intact and damaged plates is first obtained from the structural frequency analysis. Then, the location, shape, and approximate size of damage are obtained by applying this transform to the responses of the structure.

Today, the participation of local levels in the health policy process is emphasized, which can be used as a means to more appropriately solve the problems of local communities and support the health system in achieving its goals. This study aimed to design a health policy model based on participation at the local level.

This multi-method study was conducted to design a model for participation in health policymaking at the local level during three phases of systematic review, semi-structured in-depth interview, and Delphi technique. The purpose of the systematic review was to identify the factors affecting this participation, which was done by searching for suitable keywords in English and Persian databases. The objective of the qualitative phase was to identify the barriers and facilitators of participation. To this end, 16 people were selected by purposive sampling method and semi-structured interviews were conducted. The elements and components of the initial model were provided to experts in this field through the Delphi technique to confirm the items and validate them, so that the final model could be designed.

The influential factors for participation included individual, environmental, and contextual factors, which were identified from a systematic review of 21 articles. Facilitators obstacles, challenges, advantages, and disadvantages of local level participation in the policymaking process were identified through the results of a qualitative study, which were categorized into three main themes, including the participation process, the beneficiaries of the process, and the strategies to facilitate participation. Finally, the health policy model based on participation at the city level was validated and finalized using the opinion of experts.

Participation in the health policy process requires the use of facilitators and the removal of obstacles. Local levels in terms of health issues in Iran involve complex and diverse challenges that can be solved through real participation.

Futures studies are constantly evolving and help organizations and individuals for better identification of future events, opportunities, and threats. In the field of health, futures studies are also applied for better prediction of health issues in future, control of unpleasant condition and preparing for pleasant future in health system. The purpose of this study is to conduct a scoping review of the futures studies accomplished in the field of health in Iran, 

This study is a scoping review, conducted based on the Arksey and O’Malley framework with 6 steps including research question identification, related study identification, study selection / screening, data segmentation, summarizing and reporting results and providing guidance and recommendations n. National and international databases and search engines including PubMed, Web Of Science (WOS), Scopus, ProQuest, SID, Magiran, IranDoc and Google Scholar were searched using related keywords. After removing duplicate articles, the remaining articles were screened according to inclusion and exclusion criteria. The results of the selected articles were finally categorized, summarized and reported based on the mentioned steps.

Among of 6691 articles identified, 30 articles reached the final synthesis stage. The articles were classified into forecasting, foresighting, and mixed categories, with the scenario writing method being the most widely used and applied in 20 studies. Also, studies were classified in scope of nature based on quantitative or qualitative and time horizon. Types of futures studies methods in Iran, in the fields of public health, medicine, science and technology, financing, prescription, health tourism, diet, human resources, aging, Covid-19 epidemic, health policy, hospital and macro level of health system were used.

The use of futures studies methods in a targeted manner and on the issues of Iran’s health system can play an effective role in knowing the future for more informed decision-making and planning in order to build a desirable future. The results of this review showed that scattered studies have been conducted with futures studies methods in the field of health, among which the scenario writing method has received more attention.

Nowadays, non-linear analysis of structures has become an attractive matter and appears necessary for most structural engineering applications, whereas tendency for more accurate structural analysis has increased by many engineers. In general, nonlinear analysis is divided into two main parts: geometrical and material nonlinearity. In some cases, both nonlinear types are used simultaneously in the analysis process. In this paper, a new Incremental-iterative method for the analysis of truss structures, including both geometric and material nonlinearity behavior, is proposed. Nonlinear equilibrium equations are solved using an Incremental-iterative method based on the displacement control process. The basis of geometric nonlinear process is based on rotational formulation and material nonlinearity is based on tracing the stress-strain relationship for post-buckling behavior of the truss members. In this proposed method, it is assumed that the magnitude of the displacement increment vector to the size of the total displacement vector at the beginning of each load increment, is a fixed value. Based on this idea and thinking, the corresponding equations are written and a new formulation has been developed based on the displacement control scheme, as, by employing a specified displacement, the corresponding load will be obtained. Using fixed incremental displacement algorithm, this paper, proposed a novel method that has a possibility of passing the limit points in the case of highly nonlinear behavior state. The proposed method, is able to pass the limit points including snap-through and snap-back. Some examples are provided for the proposed method and by solving them, the efficiency of the proposed algorithm is examined. A limit point refers to the turning point for the equilibrium path of a structure, which can be further considered as the transition point from stable to unstable equilibrium states or vice versa. In analysis of such structures, the simple incremental iterative methods unable to pass this limit points. The simple incremental iterative methods couldn’t trace the equilibrium path after the limit points. For resolving such disadvantages, advanced analysis methods have been developed numerical examples demonstrate the feasibility and accuracy of the proposed algorithm, to be highly suitable in predicting nonlinear response of structures with multiple limit points and snap-back points, and trace the equilibrium path accurately. The results show that the method developed in this paper, traces the equilibrium curve as well as the modified arc-length method with a small difference. In spite of the fact that the procedure herein explained is only implemented for truss structures, it is possible to generate the proposed method for other structures. This paper is organized as follows. In the first section, we will have a brief review of nonlinear analysis of trusses, including both geometric and material nonlinearity. A literature review is done and a number of available methods in this field is describe. In the second section we explained the basic concepts in nonlinear analysis. The third section geometric and material nonlinear behavior of trusses are reviewed. Section four is allocated to implementation of proposed method for nonlinear analysis. In section five, the validity of the proposed method is illustrated with some examples.

Breast cancer screening programs are one of the most important methods for the early detection of breast cancer in women. Several studies have been conducted to identify factors affecting breast cancer screening behaviors among Iranian women. This study is conducted to systematically review the factors influencing women’s participation in breast cancer screening programs in Iran.

Papers were collected by using the keywords breast, mammary, screening, early detection, diagnosis*, examination, testing, and Iran from various English-language databases, including PubMed, Scopus, Web of Science, and databases in Persian language including SID and Magiran. The search was limited to the title and abstract of papers published between January 1, 2000, and May 1, 2021. A narrative synthesis was performed to summarize findings of the obtained papers.

In this study, 1345 papers were initially found and, after screening the title, abstract, and full-text, 39 papers were selected. Most of them were cross-sectional (n= 28). Results indicated that socioeconomic factors, individual characteristics, recommendation of health workers, knowledge, Islamic beliefs, support by family, and activities of the Iranian government are frequently mentioned as contributing factors and can be applied to increase participation of Iranian women in breast cancer screening.

  The results demonstrate that lack of knowledge and a positive attitude towards breast cancer screening is a major problem regarding Iranian women's non-participation in the screening programs. Therefore, the need for regular implementation of the national screening program in the country, providing appropriate educational methods to increase women's awareness, removing barriers and improving women's access to health care providers should be the priorities of the Iranian health system to prevent breast cancer.

Progressive collapse is defined as a phenomenon with spread of an initial local failure from an element to another and leads to collapse of an entire structure or a disproportionately large part of it. To assess structures against progressive collapse, using linear and nonlinear static analyses and nonlinear dynamic analysis based on permitted guidelines. Performing nonlinear static analysis with proper Dynamic Increase Factor (DIF) can be a suitable method of approach as opposed to nonlinear dynamic analysis to predict structural response. Therefore, guidelines suggest various formulas to calculate DIF for different kinds of structures. These formulas depend only on maximum acceptable ductility of the critical member and to obtain these, some approximations due to regression and analysis type occur. In this research, three dimensional structures and all the rigid connection details of beam to column and pinned connection details of beam to beam were modeled in Abaqus. The real DIFs were obtained for three locations of corner, perimeter and middle column removal using pulldown method and compared to the ones suggested by the guidelines. The results revealed that there were differences between obtained DIFs from dynamic pulldown analysis and suggested guideline DIFs and these differences were more in specific ratio of plastic to yield rotations.

Despite the emphasis on overhead documents and general social security policies, the process of implementing the Electronic Health Records (EHR) in the Iranian health system has not yet been fully implemented. The purpose of this study is to identify and explain operational barriers and solutions for the implementation of EHR in the Iranian health system.

This study was a scoping review, using the Arkesy and O'Malley framework in 6 steps including identifying research questions, identifying related studies, selecting/screening studies, data area/division of data, summarizing, reporting results, practical guidance and recommendations. Iranian databases including SID, Magiran, irandoc, and English -language databases including PubMed, Scopus, Web of Science, ProQuest and Google scholar were searched. Selected articles were analyzed using Maxqda software (version 10).

After screening, 32 articles were selected. Operational barriers and solutions were classified into three levels of macro (policy and health management), Messo (centers of health services) and micro (health service providers). Desirable management and leadership, providing the necessary standards, community-building, preparing processes, training before implementation of the project, employee participation in implementation of the plan, and government financial support were among the most important operational strategies for EHR implementation in Iran.

The implementation of EHR in the Iranian health system faces obstacles that need to be taken in coordinated and simultaneously at the level of health policy and management levels, providing centers and health service providers to improve efficiency and effectiveness.

 Pre-hospital emergency staff face stressful environments. Job stress management can make employees stay in their occupations and provide appropriate services to patients as soon as possible. Therefore, the present study was conducted with the aim of determining job-related stress and its management methods among pre-hospital emergency staff in Iran.

 In this systematic review, published English and Persian studies without time limitation were searched and reviewed electronically in Persian and English databases from PubMed, Web of Science, Scopus, SID, Magiran, and Google scholar using related keywords. After removing duplicate and unrelated articles, the quality of the articles was evaluated by the authors based on the Strobe checklist. Finally, the narrative synthesis method was used to combine the data.

 After screening, among the 113 studies, 12 studies reached the final synthesis stage based on the inclusion and exclusion criteria. Most of the studies reported moderate levels of occupational stress. Individual, occupational, organizational, and environmental factors were effective in the occupational stress of employees.

 Pre-hospital emergency workers face stressful situations on average in Iran. Using strategies such as educational intervention programs, gratitude programs, and management measures such as reducing work shifts and improving comfort facilities can help reduce the occupational stress of employees working in pre-hospital emergency centers.

One of the important prerequisites for the realization of Islamic management is the aristocracy of Islamic management research. Since there has not been a comprehensive review of this time, this research aims to identify comprehensive and multidimensional analysis of articles published in the field of Islamic management. In the present study, all the articles of Islamic management published from the beginning of the Islamic Revolution until 1400 were searched for keywords and analyzed by the scope method. This approach is aimed at evaluating the size and scope of existing literature, with the aim of identifying the nature and extent of evidence of research. Accordingly, 828 keywords combining the specific terms of knowledge management and Islamic thought to collect all the works of this area. Finally, with respect to selected articles and removing repetitive articles, 3336 unique articles in the field of Islamic management were obtained. Then the results were categorized as historical and quantitative analysis, analysis of Islamic issues and analyzing specialized management issues. The innovations of this research include the comprehensiveness of the works of Islamic management, analyzing the specialized areas of management knowledge and based on various sources of Islamic thought. In the end, fourteen results and suggestions are based on the analyzes obtained from the research. The most important result of the research is to draw the scope of research in various Islamic management areas that can guide researchers in this area.

Regular performance assessment is the basis of effective managerial decision making which is crucial for increasing the productivity of an organization. A distinct characteristic of an effective performance assessment is the implementation of various methods which are aimed at assessing the conformity with multiple indicators and criteria. The aim of the present comprehensive review was to extract the factors affecting the performance assessment of organization.

We conducted a comprehensive search in databases including PubMed, Embase, SID and Magiran in January 2020. Inclusion criteria were articles with the English language and full text available that were about influential factors. Two independent reviewers checked the research process, screening of articles.

Factors influencing an effective and efficient organizational performance assessment categorized in three themes and 22 sub-themes emerged. The themes included: “performance assessment indicators”, “performance assessment criteria” and “background factors in performance assessment”.

Indicators, criteria, and background factors provide a framework for assessing the organization's overall performance. An organization can manage its human resources effectively and efficiently by considering all the effective factors. Identification and classification of influential factors can be of help for managers and decision-makers in creating performance assessment system.

Sufficient length of consultations is of utmost importance for improving the quality of care and establishing a good physician-patient relationship. Multiple factors affecting outpatient consultation length were investigated among Sheikh Al-Raisi specialists. Sheikh Al-Raisi is a general medical institute in Tabriz, in 2018.

This study was a cross-sectional and performed at a specialty clinic in Tabriz. In order to select the samples, random sampling was used. The consultations of 400 patients with 18 specialists were analyzed. Length of Consultation and demographics of patients and physicians were collected in the year 2018. Checklists were used to collect the data and a multiple regression analysis was applied to investigate the association of the variables with consultation length.

The mean and standard deviation consultation time was 6.9 and 2.6 min. In the multivariate model, the consultation time was longer for female patients. Lengthy consultation time was recorded in patients with bachelor's degrees or higher levels of education. The consultation time was longer in patients with gynecology problems (mean = 9.1) compared to those with other problems. In addition, older and female physicians provided longer consultation.

Clinical consultation time in specialists’ practice is estimated as short and is associated with the characteristics of the patients and the doctors and the types of their specialty. The results can be applied to make specialty consultation more effective, which can ultimately result in the delivery of the most optimum consultation period for each and every patient.