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Issue Info: 
  • Year: 

    2006
  • Volume: 

    7
  • Issue: 

    2
  • Pages: 

    191-211
Measures: 
  • Citations: 

    3
  • Views: 

    2325
  • Downloads: 

    0
Abstract: 

The aim of this research was to study the effect of congnitive restructuring and systematic desensitization as important methods in REDUCTION of MATHEMATICS ANXIETY. The subjects were 64 students of third Grade secondary school of the city of Ahvaz that selected by Multi -Stage random Sampling method and divided in three groups (two groups experimental and one group control). In first group the cognition restructuring method administered at 7 Weeks and the method of systematic desensitization also was instructed simultaneously, and in third group (control group) diden't asminister any training and at the end, post test of MATHEMATICS ANXIETY was exacuted on three groups. After two mounts study, the other test was administered. The results and comarsion cognitive restructuring and systematic desensitization and control group by T-Test (independent) was approved number 1,2,3 of hypothesis and showed that this two methods were effective in the period of therapy and after the therapy (two Mounts later). Any Significance Differences In Efficacy was not observerd between the method of cognitive restructuring and systematic desensitinization.

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Issue Info: 
  • Year: 

    2021
  • Volume: 

    52
  • Issue: 

    2
  • Pages: 

    133-144
Measures: 
  • Citations: 

    0
  • Views: 

    129
  • Downloads: 

    17
Abstract: 

To evaluate the effects of different TREATMENTs on seed dormancy breaking of Notobasis, two separate experiments were conducted at Agricultural Sciences and Natural Resources University of Khuzestan, in 2017 with three replications. The first experiment included nine physical, mechanical and chemical TREATMENTs (control, surface scarification, intense scarification, one and two weeks of chilling at 4°C, soaking into hot water FOR two hours without scarification , soaking in 25°C distilled water FOR two hours with scarification  and acid TREATMENT FOR six and 12 minutes) based on completely randomized designs (CRD). The Second experiment was hormone priming arranged as a factorial experiment based on completely randomized design with gibberellin concentrations (0, 200, 400, 600, 800 and 1000 ppm) and priming duration (12 and 24 hour) as the TREATMENTs. The highest seed germination (40%) obtained from 12 minutes of acid TREATMENT. Results showed that seed germination reached to 100% after priming seeds with GA3 concentrations FOR 12 hours. However, increase the priming durations to 24 hours, significantly declined seed germination to 47% in 200 and 400 ppm of GA3 concentrations. The Increase of GA3 concentrations in 12 hours led to a linear REDUCTION of T50 from 31 hours in 200 ppm to 19 hours in 1000 ppm). In 24 hours of priming TREATMENT, T50 followed a Gaussian function and the highest T50 (92 hours) was obtained from 600 ppm. It is recommended to immerse the seeds FOR 12 minutes in sulfuric acid and prime with 400 ppm GA3 acid FOR 12 hours to break dormancy and increase the vigor index.

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Journal: 

Issue Info: 
  • Year: 

    2023
  • Volume: 

    26
  • Issue: 

    104
  • Pages: 

    77-85
Measures: 
  • Citations: 

    0
  • Views: 

    115
  • Downloads: 

    6
Abstract: 

Inertial Navigation System (INS) is one of the navigation systems widely used in various land-based, aerial, and marine applications. Among all types of INS, Microelectromechanical System (MEMS)-based INS can be widely utilized, owing to their low cost, lightweight, and small size. However, due to the manufacturing technology, MEMS-based INS suffers from deterministic and stochastic errors, which increase positioning errors over time. In this paper, a new effective noise REDUCTION method is proposed that can provide more accurate outputs of MEMS-based inertial sensors. The intelligent method in this paper is a combined denoising method that combines Wavelet TransFORm (WT), Permutation Entropy (PE), Support Vector Regression (SVR), and Genetic Algorithm (GA). Firstly, WT is employed to obtain a time-frequency representation of raw data. Secondly, a four-element feature vector is FORmed. These four features are (1) amplitude of frequency, (2) its ratio to mean of amplitudes of all frequencies, (3) location of frequency in time-frequency representation, and (4) judgment on behaviors of frequency that is obtained by utilizing PE. Thirdly, based on the feature vector, the GA-SVR algorithm predicts amplitudes of all frequencies in the time-frequency representation of the denoised signal. Finally, by employing inverse WT the denoised signal is obtained. In this work, the outputs of the Inertial Measurement Unit (IMU) in ADIS16407 sensor, as a low-cost and MEMS-based INS, have been utilized FOR data collection. The proposed method has been compared with other noise REDUCTION methods and the achieved results verify superior improvement than other methods.

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Journal: 

ENGINEERING GEOLOGY

Issue Info: 
  • Year: 

    2022
  • Volume: 

    15
  • Issue: 

    1
  • Pages: 

    105-118
Measures: 
  • Citations: 

    0
  • Views: 

    133
  • Downloads: 

    14
Abstract: 

Strength measurement of rock requires testing that must be carried out on test specimens with particular sizes in order to fulfill testing standards or suggested methods. Often, the coring process breaks up the weaker core pieces, and they are too small to be used in either index tests or conventional strength tests such as point load index (Is) and Brazilian tensile strength (BTS). One of the index tests to indirectly determine the rock strength is the block punch index (BPI) test, which requires flat disc specimens without special TREATMENT. This study aimed to evaluate the applicability of the BPI test FOR predicting the uniaxial compressive strength (UCS), BTS and IS of the sandstones by empirical equations. Also, we have compared the perFORmance of the BPI and IS FOR predicting the UCS and BTS. It was experimentally shown that BPI is a reliable method FOR predicting the UCS, BTS and Is of the sandstones under study. Moreover, the results indicate that BPI could be utilized with same importance as Is FOR predicting the UCS, while predicting the BTS by Is appears to be more reliable than BPI.

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Issue Info: 
  • Year: 

    2022
  • Volume: 

    7
  • Issue: 

    2
  • Pages: 

    103-132
Measures: 
  • Citations: 

    1
  • Views: 

    148
  • Downloads: 

    24
Abstract: 

Purpose: Managers are one of the important elements of an organization, FOR this reason, in order to draw the future of the organization, it is necessary FOR the planners to specify the conditions of their selection and appointment. ThereFORe, the current research has been done with the aim of identifying and analyzing the components of selecting future principals.Method: In this research, comparative and benchmarking method is used as a prospective approach. This approach is based on the belief that today's advanced organizations/countries can be considered as a model FOR the future of another organization/countries in their respective subjects. FOR this, first, the fields of comparison and benchmarking were determined using Brody's four-step comparison method; then the countries of Canada, Finland, Australia, South Africa, and Japan were selected according to the qualitative balance value in the international advanced TEAMS test, human development index, life quality index(health, instruction, and welfare), education quality index, and other scientific-scholarly indexes; finally, by extracting the criteria FOR the selection and appointment of principals through content analysis and comparison with Iran, the proposed framework FOR Iran has been presented.Findings: A total of 61 components FOR the selection of secondary school principals were identified from among the studies conducted in the selected countries in this article. By extracting the commonalities and differences of each of the components among the countries, it was found that the highest index of manager selection and appointment belongs to Japan and the lowest one is related to Finland.Conclusion: There are similarities between the components of selection of principals of secondary schools in Iran and selected countries. In Iran, special attention should be paid to important components such as adherence to religious principles, appropriate personality traits, creativity and innovation, motivation to develop capabilities, professional growth, power of supervision and accountability, social image, leader skills, and purposefulness and FOResight.

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Author(s): 

Issue Info: 
  • Year: 

    1401
  • Volume: 

    2
  • Issue: 

    9
  • Pages: 

    190-202
Measures: 
  • Citations: 

    1
  • Views: 

    216
  • Downloads: 

    0
Keywords: 
Abstract: 

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Issue Info: 
  • Year: 

    2022
  • Volume: 

    1
  • Issue: 

    68
  • Pages: 

    47-63
Measures: 
  • Citations: 

    0
  • Views: 

    70
  • Downloads: 

    0
Abstract: 

Coronvirus desies and its consequences have caused concern among various segments of society. In particular, the change in teaching methods from online to face-to-face training and the damage caused by this process in some cases has made this educational process difficult. Thus, identifying students' concerns and understanding the predictions of ANXIETY in the reopening of educational institutions will allow us to address the roots of this factor after the Corona epidemic and the reopening of schools.. This research is a qualitative research and content analysis and its statistical population is high school students in Tehran at the time of reopening of schools after the Corona epidemic. From this statistical population, 40 male and female subjects who met the research criteria were selected. After interviewing the subjects and analyzing them, sub-themes and main themes have been identified and classified.

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Issue Info: 
  • Year: 

    2022
  • Volume: 

    52
  • Issue: 

    3
  • Pages: 

    189-194
Measures: 
  • Citations: 

    1
  • Views: 

    127
  • Downloads: 

    38
Abstract: 

Intracytoplasmic sperm injection (ICSI) is one of the most successful techniques of Assisted Reproductive Technology (ART) and is mostly in use FOR the TREATMENT of infertility with male factors. In this method, beFORe injecting sperm into the intracytoplasmic of the oocyte, cumulus cells around the oocyte must be stripped to facilitate the injection process. To achieve this, both enzymatic and mechanical methods are used in embryological laboratories FOR denudation, which has major deficiencies, including the possibility of damaging the oocyte prior to the injection process. In this research, a microfluidic-based device is introduced FOR the separation of cumulus cells around the oocyte with minimum manual operations. The results prove high efficiency, and non-destructive denudation of the oocyte with the reduced amount of culture medium leads to the low-cost preparation process of oocytes. The process can also be integrated with ICSI chips under development and will be reported shortly.

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Author(s): 

alireza assareh alireza assareh | aminifar elahe | sheivandiCholicheh Kamran | assareh alireza

Issue Info: 
  • Year: 

    2022
  • Volume: 

    1
  • Issue: 

    68
  • Pages: 

    5-24
Measures: 
  • Citations: 

    0
  • Views: 

    90
  • Downloads: 

    0
Abstract: 

The aim of the current research was to identify the characteristics of the four elements in order to provide a problem-oriented curriculum model in the elementary school MATHEMATICS course. There were 19 participants and the sampling was done purposefully. The data collection tools are semi-structured interviews and questionnaires. The problem-oriented curriculum template was designed using the characteristics of the elements and with the method of qualitative content analysis in the elementary school MATHEMATICS course. The identified features were validated by fuzzy Delphi method and Shannon's entropy method was used FOR data processing. Based on the results of the analysis, 7 main categories including the characteristics of goals at three levels of cognitive, attitudinal, skill, content, evaluation, teaching-learning strategy and 46 sub-categories were identified.                                                                                                                                                                In the fuzzy Delphi section, all features were confirmed by obtaining a de-fuzzified value greater than 0.7. The results of Shannon's entropy determined that the characteristics of starting teaching with a challenging question, creating a suitable educational environment, continuously monitoring the quality of learning strategies and communicating with students' talents have attracted the most attention and obtained the highest ranks and had a higher importance factor than other characteristics

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Issue Info: 
  • Year: 

    2022
  • Volume: 

    7
  • Issue: 

    2
  • Pages: 

    279-308
Measures: 
  • Citations: 

    0
  • Views: 

    123
  • Downloads: 

    17
Abstract: 

Purpose: The present study aims to identify and explain the futures of Iranian provinces in the competition FOR the development of NBIC technological convergence (synergy between nanotechnology, biotechnology, inFORmation technology and cognitive sciences) with a focus on Yazd province. Method: This research, which has been conducted with a qualitative and descriptive approach, is classified as an exploratory futures-study. In this way, the relevant research records were first reviewed to compile a list of drivers in the development of convergent technologies. The list was then refined and prioritized to identify two key drivers, with the Delphi process attended by fourteen experts. By intersecting the uncertainties of these two drivers, four scenarios of the province's future in technological convergence competition emerged. Findings: The two key drivers affecting the success of the province in the competition FOR convergent technologies are: the rate of development of the innovation ecosystem and the amount of financial resources allocated to this process. Based on this, four scenarios of the future situation of the province in this field were identified, which have been named as "Vanguard", "Buyer", "Remnant" and "Hired". Conclusion: In order FOR the provinces to be able to succeed in the FORthcoming competitions in the production and operation of convergent technologies, it is necessary to plan FOR strengthening the ecosystem infrastructure from now; at the same time, it is necessary to make efficient efFORts to provide sufficient financial resources FOR the research and commercialization of these technologies.

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