مطالب مرتبط با کلیدواژه

construction


۱.

The Impact of Migrant Labor Force on Housing Sector’s Efficiency of Iran(مقاله علمی وزارت علوم)

نویسنده:

کلیدواژه‌ها: DEA Iran Performance Migrant Afghans construction

حوزه‌های تخصصی:
  1. حوزه‌های تخصصی اقتصاد اقتصاد خرد اقتصاد جمعیت و اقتصاد کار تحرک،بیکاری و استخدام تحرک جغرافیایی نیروی کار،کارگران مهاجر
  2. حوزه‌های تخصصی اقتصاد اقتصاد بخشی،اقتصاد صنعتی،کشاورزی،انرژی،منابع طبیعی،محیط زیست اقتصاد صنعتی ساختار بازار،استراتژِ بنگاه و عملکرد بازار تولید،قیمت گذاری و ساختار بازار،توزیع سایز بنگاه ها در بازار
تعداد بازدید : ۱۵۲۸ تعداد دانلود : ۵۳۹
Iran has been host to the largest number of migrants in the form of Afghan refugees since 1982. These refugees have been permitted to find jobs in Iranian labour market, particularly in the labour intensive markets like manual jobs and construction activities which could not easily be filled by Iranian workers. The research provides a critical review of the impact of migrated Afghan labourers on the efficiency performance of the construction sector of Iranian economy during the period 2006 – 2009, using data envelopment analysis. Results show that, despite the high costs incurred by Iran as host to more than one million refugees, it also benefited from the presence of Afghans. Statistical analysis shows that there is a significant difference between the efficiency scores of the provinces using more migrant Afghan labour force and those having less concentration of such labourers in construction activities. That means most of the technically efficient states in construction activities have the opportunity to employ Afghan workers, since they used to be a very competitive and flexible labour force with unattractive payment. As a result the repatriation program of the Iranian government on Afghan refugees could be limited because of the low levels of substitution among Afghan and Iranian workers in the field of construction.
۲.

An Analysis of Persian Compound Nouns as Constructions(مقاله علمی وزارت علوم)

کلیدواژه‌ها: Constructional schema construction Systematic Correlation between Form and Meaning Hierarchical Lexicon Holisticity Paradigmatic Relationship

حوزه‌های تخصصی:
تعداد بازدید : ۷۳۹ تعداد دانلود : ۳۵۱
In Construction Morphology (CM), a compound is treated as a construction at the word level with a systematic correlation between its form and meaning, in the sense that any change in the form is accompanied by a change in the meaning. Compound words as one type of complex words are coined by compounding patterns or templates which are called abstract schemas in CM. These abstract constructional schemas generalize over sets of existing compound words and specify how new compound words can be created. The schemas dominate the compounds so that these words inherit all predictable morphological and semantic properties from these schemas. In fact, this is mainly the constructional schema which determines the properties for every compound word not individual constituents of a compound word. Therefore, the form and meaning of a compound, as a whole, are affected by formal and semantic/syntactic properties of the construction itself. Also, the dominance of schemas and subschema as over the compound words reinforces the idea of hierarchical lexicon. In addition, CM adopts a paradigmatic approach to word formation; that is, the creation of new compound words is caused by the extension of a systematic form-meaning relationship in a set of existing compound words to new cases resulting in new compound words. Regarding these properties of CM, This paper aims to study one type of Persian compounds, that is, compound nouns in the framework of Construction Morphology. From this perspective, two types of compound nouns including endocentric and exocentric compound nouns are treated in a rather similar way because the compound noun construction as a holistic schema plays the main role in specifying the syntactic features, head(if any) and semantic content of compound nouns, not their constituents. According to findings of this study, the analysis of Persian compound nouns based on this model increases the degree of generality in compound noun formation and develops the concept of holisticity in the form and meaning of compound nouns as well as it highlights the paradigmatic relationship in Persian compound noun formation templates.
۳.

Construction and Standardization of Passion Quotient Test in Elementary Students(مقاله علمی وزارت علوم)

کلیدواژه‌ها: construction Standardization test Passion quotient Elementary Students

حوزه‌های تخصصی:
تعداد بازدید : ۷۳۵ تعداد دانلود : ۲۹۶
Purpose: Considering the role and importance of passion in elementary students, the present study was conducted with the aim of constructing and standardizing passion quotient test in elementary students. Methodology: This study was a descriptive from type of correlation. The population of this research was elementary students in District 5 of Tehran city in the academic year of 2019-20, which number of 500 people of them was selected as a sample by multi-step cluster sampling method. For passion quotient was prepared a researcher-made test (20 items) and its psychometric indices were examined. For this purpose, the content validity of the instrument was calculated by opinion experts, its structural validity was calculated by exploratory factor analysis by principal components method and its reliability was calculated by Cronbach's alpha and combined methods. For analyze data were used from SPSS-25 and LISREL-8.8 statistical software. Findings: The results showed that the content validity of the instrument was confirmed by opinion experts and its construct validity by factor analysis method indicated the existence of four factors of interest, sensation seeking, focus and intimacy in relationships. The reliability of total and factors of interest, sensation seeking, focus and intimacy in relationships with Cronbach's alpha method were calculated 0.94, 0.88, 0.70, 0.90 and 0.71, respectively and with combined method were calculated 0.96, 0.90, 0.88, 0.91 and 0.83, respectively. Conclusion: Passion quotient test with four factors of interest, sensation seeking, focus and intimacy in relationships had good validity and reliability. Therefore, it can be used to investigate and measure the passion quotient of elementary students to plan to improve their passion and motivation.
۴.

A Comparative Inquiry Regarding the Party's Activity and Performance in Iran and Turkey (The Study Case: Participation, Justice and Development Party)(مقاله علمی وزارت علوم)

کلیدواژه‌ها: structure Agent construction Participation Party justice Development Party

حوزه‌های تخصصی:
تعداد بازدید : ۳۲۸ تعداد دانلود : ۲۸۵
Many social sciences researchers call the presence of democratic parties and systems as two faces of a coin; they regard the development and survival of democratic parties and procedures related to each other. In Iran's cultural and political domain, the participation party presented itself as a significant movement in its socio-political sphere. This party has introduced itself as the defender of Islam in the region and the world. This research emphasizes two categories of structure and performance than the two flows of Iran's participation party and turkey's Justice and development party using an analytical – descriptive method. In response to the research question ‘what are the similarities and differences of the participation party and the Justice and development party in terms of structure and performance?’ presented this hypothesis that the participation party and the Justice and development party lacked a similar party structure. The difference between them is that the participation party has less coherence and antiquity than the justice and development party. Both parties have an Islamic approach; with the difference, the participation party has a variation in trend (national and Islamic) with a no secular system. The Justice and development party enjoy a single direction (Islamic direction) with a secularist approach.
۵.

An Strategy of Product and Process-Oriented Design of Industrialized Building System Qualities(مقاله علمی وزارت علوم)

کلیدواژه‌ها: Building industrialization product-oriented process-oriented design qualities construction

حوزه‌های تخصصی:
تعداد بازدید : ۳۶۴ تعداد دانلود : ۲۴۴
Indus trialized Building has been introduced as a method with better productivity, quality, and safety, and it is defined as a cons truction sys tem where components are manufactured at factories on or off-site, transported, and then assembled into with minimum work in the s tudy of the use of building indus trialization, the ques tion of this s tudy is to apply product-oriented and process-oriented in the quality of building indus trialization and interaction and the overlap between the two areas in the category of indus trialization. Explaining the characteris tics of these two aspects leads to various s tructures that include the main objectives of this s tudy. With the help of product-driven and process-driven approaches, it can be achieved with varying qualities of building indus trialization. In this regard, several experts' views have been reviewed s tudied, and a five-s tep quality is extracted. Finally, employing interface tools to two product-driven and process-oriented approaches, a good choice concerning the five-s tep quality has been made for designers in building indus trialization.
۶.

Reconstruction of Simple and Complex Three Dimensional Images Using Pattern Recognition Algorithm(مقاله علمی وزارت علوم)

کلیدواژه‌ها: Syntactic approach construction reconstruction 3D images

حوزه‌های تخصصی:
تعداد بازدید : ۳۷۵ تعداد دانلود : ۱۱۹
The reconstruction of 3D images is always a difficult task for the researchers. The 3D reconstruction of the image is a core technique of various fields such as Computer graphics, computer vision, CAD systems, medical science, computer application, etc. Reconstruction of the 3D image allows us to gather the quantitative features of the objects such as the shape, size, and volume of the objects. The existing computer algorithms need spatial dimension information to make the distinguished inference from the given 3D image which is not always possible. This paper simplifies the 3D reconstruction of the image. This research paper introduced a novel algorithm for the representation of the Three Dimensional images into a textual form.  The syntactic approach is used for the extraction of the features of the image and these are called knowledge vectors. The knowledge vector consists of the direction information and length information. This a new approach in the field of image processing where images can be represented as a knowledge vector and it could be a great contribution in the field where security is a major concern. Further, the knowledge vector is used for the reconstruction of the 3D image. The performance of the algorithm is evaluated on the PASCAL 3D + and example-based Synthesis of the 3D Object Arrangements dataset. According to the obtained results, the proposed methodology is having better accuracy, and the processing time of reconstruction of the original 3D image is 1.02 Seconds. Single-pass is sufficient for reconstructing the original image
۷.

Construction and Validation of an Occupational Psychological Empowerment Tool for Relief Workers of the Iranian Red Crescent Society(مقاله پژوهشی وزارت بهداشت)

تعداد بازدید : ۱۸۴ تعداد دانلود : ۱۲۷
INTRODUCTION: Maintaining the mental health of relief workers requires improving their psychological abilities. The present study is carried out with the aim to identify the components affecting the psychological empowerment of the relief workers and to construct a tool appropriate to the psychological requirements and characteristics of the relief activities to measure the components of the occupational psychological empowerment among them. METHODS: This was an applied study performed with quantitative and qualitative methods (Mixed Method) in different stages in accordance with the study objective. FINDINGS: In this study, 351 relief workers cooperated with an average age of 28.56 and standard deviation 8.13. The findings from the completion of questionnaires confirmed the six factors of resilience, self-management, psychological hardiness, problem-solving ability, decision-making, and emotional intelligence (EI) on the researcher-made scale. The most important factor in this study was the resilience factor with the greatest impact on the job psychological empowerment of the relief workers.
۸.

Blockchain for Project and Construction Management; A Systematic and Scoping Literature Review(مقاله علمی وزارت علوم)

کلیدواژه‌ها: Blockchain Project Management Smart contract Distributed Ledger Technology (DLT) Digital Transformation construction

حوزه‌های تخصصی:
تعداد بازدید : ۴۴۱ تعداد دانلود : ۱۷۴
At this time in history that the world is becoming smaller every day due to globalization; it is important to achieve an acceptable degree of trust and confidence in any field; and blockchain can put the world on this path. Since there is no central authority governing blockchain, its decentralized nature can turn it into an appropriate platform for project management. Implementing blockchain eliminates project management bureaucracies and allows a single, unchangeable, controllable, and encrypted source to be accessible to everybody and extensible throughout the project life cycle. This approach is the key to achieve an integrated information system and is one of the important reasons for blockchain applicability as an ideal platform for project management and construction. This issue that using blockchain technology in project management will bring about capacities and capabilities has not yet been seriously addressed. Changing the management of construction projects by blockchain is just an idea for now. This study aims to identify the capacity and platforms for developing blockchain technology in project management and construction using systematic and scoping literature reviews. Moreover, it provides some suggestions about the development and improvement areas of this technology. The review results showed that in all areas of project management and construction, there are applications relevant to blockchain technology that confirm the gradual understanding of the significance and positive impact of this technology on enhancing project management and construction performance. According to the results, a major part of blockchain studies was focused on “program and project management”, and two fields of human resources and behavioural areas and research in project management and schools of thought with a share of less than 2% of existing studies were neglected.
۹.

Construction and Evaluation of Psychometric Properties of Teachers' Job Motivation Questionnaire(مقاله علمی وزارت علوم)

کلیدواژه‌ها: construction Psychometrics Job motivation teachers External Motivation Internal Motivation

حوزه‌های تخصصی:
تعداد بازدید : ۳۷۴ تعداد دانلود : ۱۶۳
Purpose: Considering the importance of job motivation in educational jobs, the present study was conducted to construct and evaluate the psychometric properties of teachers' job motivation questionnaire. Methodology: The present study was applied in terms of purpose and descriptive-correlational in terms of implementation method. The study population was elementary school teachers in Tehran in 2019-20, which the sample size was estimated 400 people based on Cochran's formula and were selected as a sample by multi-stage cluster random sampling. Data were collected by a researcher-made job motivation questionnaire (49 items) and analyzed by exploratory factor analysis and structural equation modeling in SPSS-22 and AMOS-24 software. Findings: The results showed that teachers' job motivation had 2 factors and 9 components; so that the external factor of job motivation includes four components of school environment, payroll system, leadership style / managerial support and performance appraisal and reward and the internal factor of job motivation includes five components of in-service training, work and cognitive interests, effective communication, perfectionist thoughts and selection and the factor loading of both factors and all nine components were significant at the confidence level of 0.99. Also, the content validity of the instrument was confirmed by experts and the convergent validity of the instrument was confirmed by the correlation coefficient of the score of each factor or component with the total score of the instrument. In addition, Cronbach's alpha reliability for the whole instrument was 0.92, external factor of job motivation 0.85, internal factor of job motivation 0.89 and components of school environment 0.75, payroll system 0.66, leadership style / managerial support 0.91, performance appraisal and reward 0.65, in-service training 0.82, work and cognitive interests 0.90, effective communication style 0.81, perfectionist thoughts 0.83 and selection was 0.71. Conclusion: Teachers' job motivation questionnaire was a valid and reliable instrument. As a result, specialists and planners of the education system can use it to review and evaluate the current situation of teachers' job motivation and provide solutions to strengthen their job motivation.
۱۰.

Construction, validity and reliability of online teaching satisfaction model in virtual course professors

کلیدواژه‌ها: online teaching satisfaction questionnaire construction Accreditation Trust online professors

حوزه‌های تخصصی:
تعداد بازدید : ۱۲۳ تعداد دانلود : ۱۰۷
The purpose of this research was to construct, validate and determine the reliability of online teaching satisfaction model among virtual course professors. For this purpose, an attempt has been made to design a questionnaire based on the model of Bolliger and Vasilik (2009) to measure the satisfaction of professors with online teaching. In order to create, compile and standardize such a questionnaire, the literature related to satisfaction with online teaching, which was available in the form of articles and books, was carefully reviewed. Finally, the definitions and concepts of satisfaction with online teaching were designed as 30 questions with 5 options using the "Likert scoring" method in the form of measuring the satisfaction of professors with online teaching. The reliability of the questionnaire was evaluated through Cronbach's alpha and retest and construct validity through confirmatory factor analysis. The formal and content validity of the questions was examined by asking the opinions of 19 expert professors in the field of online teaching, and its reliability was also tested on 50 professors of online courses in the "retest" method and at a time interval of 5 weeks. , 0.72 was calculated. Then the questionnaire was implemented on 350 professors of the virtual courses of Payam-Noor University and by using factor analysis with "rotational" method of "Varimax" type, 3 factors with characteristic value higher than 5 were determined as follows: "Satisfaction" from the organization", "student satisfaction" and "self satisfaction". Therefore, the reliability coefficients were between 0.68 and 0.89 for all subscales and 0.78 for the whole questionnaire by the test-retest method. The internal consistency coefficients for all subscales were between 0.62 and 0.75 and for the whole questionnaire was 0.93. In general, the validity and reliability coefficients obtained for the questionnaire were satisfactory. The designed questionnaire is distinguished from other questionnaires in the field of online teaching satisfaction for two reasons. First, this questionnaire covers areas of satisfaction that are related to organizational, student, and self-satisfaction. Second, each of its questions is derived from a defined index, and this issue makes the professors' "satisfaction with online teaching" based on a theoretical framework. Finally, it can be said that according to the reliability and validity results, this questionnaire is a relatively suitable tool for measuring the threshold of "satisfaction with online teaching" of online course professors at Payam Noor University. Obviously, building a scale to measure an existing structure is extremely difficult and time-consuming if done correctly; For example, studying the history of the formation of well-known tests in the world, which are highly reliable and valid.
۱۱.

On the Architectonic Idea of Mathematics(مقاله علمی وزارت علوم)

نویسنده:

کلیدواژه‌ها: architectonic geometry mathematics Arithmetic construction

حوزه‌های تخصصی:
تعداد بازدید : ۴۷ تعداد دانلود : ۳۷
The architectonic is key for situating Kant’s understanding of science in the coming century. For Kant the faculty of reason turns to ideas to form a complete system. The coherence of the system rests on these ideas. In contrast to technical unity which can be abstracted a posteriori, architectonic ideas are the source of a priori unity for the system of reason because they connect our reasonable pursuit to essential human ends. Given Kant’s focus on mathematics, in the architectonic and his critical philosophy more generally, we must have some sense of the architectonic idea of mathematics. In this paper, I argue for the key principles of the architectonic idea of mathematics: 1) because mathematics is grounded in a priori intuition, it is a peculiarly human activity; 2) the method of mathematics is one of a priori construction, a method only mathematics can employ and: 3) the objects of mathematics are extensive magnitudes. Given these principles, we can use the architectonic idea to have some clarity about how mathematics has dealt with historical development.