فیلترها/جستجو در نتایج    

فیلترها

سال

بانک‌ها




گروه تخصصی











متن کامل


اطلاعات دوره: 
  • سال: 

    1401
  • دوره: 

    12
  • شماره: 

    47
  • صفحات: 

    75-93
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    138
  • دانلود: 

    11
چکیده: 

Background: The expansion of the use of audio AND video media technology has faced society with many medical, cultural AND economic challenges. In the meantime, excessive use of mobile phones can cause many problems. Objective: The aim of this study was to construct AND validate a questionnaire on physical AND psychological injuries of mobile phones. Method: The method of the present study was descriptive-correlational AND confirmatory factor analysis. The statistical population of the study consisted of all citizens of Khorramabad with a diploma or higher in 1399, which was selected as a statistical sample by available sampling method of 200 people online AND virtual. Results: The results showed that the factorized physical AND psychological harm questionnaire of cell phone with 42 questions AND 10 components (fear of loss, vibration syndrome, duck syndrome, nomophobia, insomnia, hearing problem, eye syndrome, tunnel AND neck syndrome SMS) AND has good reliability, validity AND flexibility in terms of psychometrics. Discussion AND Conclusion: The questionnaire of factor analysis of physical AND psychological injuries of mobile phones can be used to identify AND study the physical AND psychological injuries of mobile phones.

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 138

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 11 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
اطلاعات دوره: 
  • سال: 

    1400
  • دوره: 

    52
  • شماره: 

    2
  • صفحات: 

    123-131
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    147
  • دانلود: 

    13
چکیده: 

Lactation length is different in individual cows, which is generally converted to a 305-day stANDard using curve fitting models for genetic AND management practices. Individual curves do not have a stANDard shape in all cases, AND can deviate from the stANDard pattern according to factors such as individual differences, AND type of fitted models. These non-stANDard curves, called atypical, resulted from incorrect estimated parameters of the curves; which consist of: continuously increasing or decreasing AND reversed stANDards. This study was conducted to investigate the importance of atypical curves in estimation of 305-day milk production, by fitting two nonlinear models? Wood (empirical) AND Pollott (biological), on 7659 AND 6692 test-day milk yield of 977 AND 776 first calving Iranian Simmental AND Jersey cows, during 2007-2020, using R software. Different patterns obtained based on the combination of increasing (b) AND decreasing (c) phase parameters of curves. The number of stANDard curves from the Pollott AND Wood models were 85.5% AND 62.2% for Simmental, AND 83.1% AND 70.6% for Jersey cows, respectively. Only continuously increasing curves were observed in both breeds in Pollott model (14.8% AND 16.9%, Simmental AND Jersey cows, respectively); Whereas in Wood model, all 3 groups of atypical curves were observed, which the reversed stANDard was the most (22.3% AND 16.5%, Simmental AND Jersey cows, respectively). Based on the findings, at the time of stANDardizing the production of dairy cows (national evaluations), not only differences between breeds, but also special attention to the production of atypical curves, should be paid (to correct or discard them).

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 147

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 13 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
نویسندگان: 

صدرحسینی سیدعلیرضا

نشریه: 

فصلنامه سیاست

اطلاعات دوره: 
  • سال: 

    1386
  • دوره: 

    37
  • شماره: 

    2
  • صفحات: 

    121-152
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    1105
  • دانلود: 

    240
چکیده: 

بر اساس نظریه نیابت عامه فقیه از امام معصوم، هرگونه تصرف حاکمان جور در مال و جان و شئون عمومی جامعه اسلامی در زمان غیبت بدون اذن فقها نامشروع است. به نظر منکران ولایت فقیه که ولایت بر حوزه زندگی دینی و عمومی مردم را در انحصار امام معصوم می دانند تصرف فقها - و به طریق اولی غیرفقها - در این امور فاقد مشروعیت است. در نظریه سومی که در این مقاله مطرح شده، فقها وظیفه دارند در زمان غیبت برای تصدی امر حکومت قیام کنند و مومنان هم موظفند با آنان برای این منظور همراهی کنند؛ ولی در صورتی که آنان در برقراری حکومت توفیق نیافتند، حاکمان جائر موظفند جامعه اسلامی را بر اساس قوانین شرع و مطابق مصالح عمومی مسلمین اداره کنند و برای این منظور مجازند تصرفات شرعی و عقلایی لازم را در زندگی اجتماعی مردم اعمال کنند. از نتایج مهم این نظریه، ترتب آثار شرعی بر تصرف های عقلایی و منطبق با موازین شرعی آنان در جان و مال مردم و مشروعیت همکاری مردم با این حکومت ها در این موارد، مگر در مواردی که مصلحت اهمی آن را ممنوع سازد، می باشد.

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 1105

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 240 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
نویسندگان: 

Baghbani-Arani Abolfazl | Adavi Zohrab

اطلاعات دوره: 
  • سال: 

    1400
  • دوره: 

    52
  • شماره: 

    2
  • صفحات: 

    83-95
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    154
  • دانلود: 

    20
چکیده: 

To investigate the effect of vermicompost, N fertilizer AND their integration on growth, biological AND essential yields oil AND its components in two populations (Varamin AND Isfahan), an experiment was conducted in a rANDomized complete block design with three replications in the field of Isfahan Medicinal Plants Research Center in 2016. Fertilizer treatments including 100% urea, vermicompost 33.3 AND urea 66.6%, vermicompost 66.6 AND urea 33.3%, 100% vermicompost AND control treatment (without fertilizer) as the first factor AND Varamin AND Isfahan populations as the second factor were selected. The results showed that the interaction effects of nitrogen fertilizer AND populations on all studied traits were significant. In both populations, nitrogen fertilizer improved height, biological AND essential oil yields, content of essential oil compounds (d-Carvone AND its yield, α-phellANDrene AND linalool; except p-Cymene AND Limonene in Isfahan population). Since in medicinal plants, the quantity (biological yield) AND quality (essential oil AND d-Carvone; the most important ingredient AND the highest amount of essential oil in this experiment), 66.6% vermicompost + 33.3% urea in Varamin population, was the best treatment in the experiment. In addition an in the direction of human health AND sustainable agriculture, it is possible to reduce 33% of chemical fertilizers application AND pollution; however, in terms of other essential oil contents (α-phellANDrene, Linalool AND p-Cymene), 100% vermicompost fertilizer treatment was superior in Isfahan population.

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 154

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 20 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
نویسندگان: 

, ,

نشریه: 

اطلاعات دوره: 
  • سال: 

    1403
  • دوره: 

  • شماره: 

  • صفحات: 

    10-19
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    29
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 29

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
نویسندگان: 

CAMPBELL A.V.

اطلاعات دوره: 
  • سال: 

    2000
  • دوره: 

    8
  • شماره: 

    1
  • صفحات: 

    35-40
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    136
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 136

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 1 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
نویسندگان: 

Bakhshi Amirhousein | Khalili Ahmad

اطلاعات دوره: 
  • سال: 

    1402
  • دوره: 

    11
  • شماره: 

    2
  • صفحات: 

    173-200
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    159
  • دانلود: 

    33
چکیده: 

ABSTRACT Over the past 50 years since the first research in the field of urban development implementation plans, there has been a noticeable absence of a comprehensive literature review on this topic in the global arena. This article provides a textual analysis related to the subject of urban development implementation plans, to identify important AND recurring themes alongside analyzing the relationships between authors, journals, AND countries in this field. Along with the bibliographic analysis, documents related to the field of urban development implementation plans were reviewed to identify influential indicators in their implementation. To this end, 456 scientific articles were extracted from the Scopus scientific database as of October 28th, 2022, AND analyzed using scientometric software. These analyses include examining author keywords, country co-authorships, journal bibliographic coupling, AND author co-citations. In this study, 74 final indicators were identified as the most recurrent indicators in this field. The bibliographic analysis also produced several noteworthy results. The United States is the most active country in this field, with a link strength of 40 AND 176 articles. Berke, P. is the most influential author in this field, with a link strength of 1623 AND 99 citations. Among the journals examined, "LAND Use Policy" has the highest bibliographic coupling strength of 84, AND the "Journal of the American Planning Association" has the highest number of documents related to this field, with 22 documents; finally, among the identified. Extended Abstract Introduction The implementation of urban development projects has been a neglected topic in public policy research, despite its critical importance in ensuring the success of such projects. While there have been numerous studies on the factors that contribute to the success or failure of policy implementation, there has been a lack of systematic reviews on the subject of implementation as a whole. This study aims to address this gap in knowledge by providing a comprehensive overview of the implementation process of urban development projects. This study aims to address this gap in knowledge by providing a comprehensive overview of the implementation process of urban development projects. The study begins by collecting AND categorizing existing research in the field, focusing on three main questions: -What are the key indicators for successful implementation? -What are urban journals AND articles' current trends AND performance? -How do countries AND researchers collaborate in this area? The study also examines the relationships between authors, publishers, AND different types of documents through bibliographic analysis. Ultimately, this study highlights the need for further research AND a more structured approach to understANDing the implementation process of urban development projects.   Methodology This study examined the literature related to implementation AND evaluation plans in urban AND lAND use planning. The authors used the Scopus database to extract AND collect data, focusing on combining the keywords "implementation-plan" AND "evaluation-plan" in the keywords, abstracts, AND titles. Initially, 621 studies were extracted, but 456 articles were selected as the final database after filtering out non-article documents. The authors observed a general upward trend for studies from 1968 to 2022, with a significant increase in the slope of the trend from 2007. However, a slight decrease in studies was observed in 2021 AND 2022, possibly due to the global pANDemic AND the emergence of new related topics. The authors used a four-stage process to analyze the bibliographic subject of the study, including simultaneous occurrence analysis, co-authorship analysis, bibliographic coupling analysis, co-citation analysis, content analysis, AND thematic analysis. The authors identified the selected articles' research objectives, methodologies, findings, AND main themes AND sub-themes. Overall, this study provides a comprehensive analysis of the literature on implementation AND evaluation plans in urban AND lAND use planning.   Results AND discussion This research aims to comprehensively analyze the implementation AND execution of urban development plans using bibliometrics AND systematic analysis. The study considers evaluation as a crucial part of the implementation process AND seeks to answer three fundamental questions. Firstly, it identifies effective indicators of implementation AND execution globally. Secondly, it examines the trends AND performances of new articles AND urban journals. Thirdly, it investigates the pattern of cooperation among countries AND researchers. The study identifies 74 general indicators that significantly impact the implementation process of urban plans. The results show that "performance evaluation," "effectiveness," "lAND use," "zonation," "participation," "program quality," AND "implementation program" are critical indicators in this area. The study also highlights the importance of evaluation in the discussion of program implementation AND its separability from the implementation process. Using the scientometric software VOSviewer, the study analyzed 68 keywords related to the bibliographic topic. "Program evaluation" obtained the first place, followed by "Program implementation" AND "Program quality." The co-authorship analysis based on author items revealed that Berke, P. has the highest number of citations AND link strength. Additionally, the study found that 72 countries have research in this field, with 22 countries having at least 5 citations that were clustered into 5 clusters by the software. The "lAND use policy" journal had the highest link strength, AND the "Journal of the American planning association" had the highest number of documents related to this field. In conclusion, the study provides valuable insights for policymakers AND researchers interested in urban development planning. It comprehensively examines the implementation AND execution of urban development plans, identifies effective indicators, AND investigates the pattern of cooperation among countries AND researchers. The study highlights the importance of evaluation in the implementation process AND its separability from the implementation process.   Conclusion The main goal of this research was to fill the gap in research on the implementation AND execution of urban development projects in the field, as no systematic review of the topic has been conducted from a global perspective since the first research in this field about half a century ago. Only in some studies, such as those by Talen (1996), Oliveira & Pinho (2010), Rudolf & Grădinaru (2017), has the evaluation of implementation been systematically reviewed, or the systematic review of experiences in a specific urban area, such as the review of various experiences in the Beijing urban area (Chu, 2020). In this research, with the comprehensive approach that the evaluation of implementation is an integral part of the overall process of implementing AND executing urban development projects, this process has been examined from the perspective of bibliometrics AND systematic analysis of this field. The main difference of this research, which makes it completely new, is firstly having a comprehensive approach to the implementation field, where program evaluation is only an important part of its structure, AND secondly, using the scientometric software VOSviewer for the first time in this field. In essence, the conclusive outcomes of this investigation were entirely novel AND exhibited some partial congruences with antecedent studies in the domain of appraising AND discerning indicators. Significantly, this research has conferred a systematic appraisal of the literature concerning the urban implementation AND execution of projects, which is an unprecedented contribution. It should be acknowledged that this is an initial survey of data intended to offer a comprehensive outlook on this scholarly field, AND thus it is subject to certain limitations, such as its confinement to the Scopus database. As such, it is recommended that future research endeavors encompass an analysis of additional databases AND undertake comparative evaluations of the results. Funding There is no funding support.   Authors’ Contribution Authors contributed equally to the conceptualization AND writing of the article. All of the authors approved thecontent of the manuscript AND agreed on all aspects of the work declaration of competing interest none. Conflict of Interest Authors declared no conflict of interest.   Acknowledgments  We are grateful to all the scientific consultants of this paper.

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 159

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 33 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
نویسندگان: 

Reyhani Poul Soheyl | Yeganeh Sakineh

اطلاعات دوره: 
  • سال: 

    1402
  • دوره: 

    20
  • شماره: 

    140
  • صفحات: 

    52-65
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    66
  • دانلود: 

    0
چکیده: 

1The aim of present research in the first stage was to extract astaxanthin from Haematococcus pluvialis using acid-acetone method AND then nanoencapsulation of the pigment using maltodextrin-sodium caseinate coating. In the next step, antioxidant AND antibacterial activities of nanocapsules carrying astaxanthin AND the free form of the pigment was evaluated. In order to evaluate antibacterial activity of the samples, Listeria monocytogenes, Staphylococcus aureus, Streptococcus iniae, Bacillus subtilis (Gram positive), Yersinia ruckeri, Escherichia coli AND Enterobacter aerogenes (Gram negative) were used. The results showed that the antioxidant activity of nanocapsules carrying astaxanthin is significantly higher than the free form of pigment (p<0.05); In addition, this activity was improved by increasing the concentration of samples from 100 to 200 µg/ml (p<0.05). By astaxanthin nanoencapsulation, the diameter of non-growth zone of the studied bacteria increased (p<0.05), but minimum inhibitory concentration (MIC) AND minimum bactericidal concentration (MBC) of the pigment AND its carrier nanocapsules decreased (p<0.05). According to the results of zone of inhibition, Gram positive (except Listeria monocytogenes) AND Gram negative bacteria were resistant up to concentrations of 60 AND 80 µg/ml of samples, respectively. In the following, the MIC AND MBC of the pigment (free AND nanoencapsulated forms) for the seven bacteria ranged from 50 to 400 AND 100 to 500 µg/ml, respectively. The results of evaluation the antioxidant AND antibacterial activities of nanocapsules carrying astaxanthin during storage period (30 days at 4ºC) indicated stability AND no significant change of these properties (p>0.05). According to the values of diameter of non-growth zone, MIC AND MBC, Listeria monocytogenes was the most sensitive bacteria against astaxanthin AND its carrier nanocapsules. Based on the findings, astaxanthin extracted from Haematococcus pluvialis has antioxidant AND antibacterial activities, AND these properties are improved by the pigment nanoencapsulation using maltodextrin-sodium caseinate coating.

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 66

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
نویسندگان: 

, ,

نشریه: 

اطلاعات دوره: 
  • سال: 

    1403
  • دوره: 

  • شماره: 

  • صفحات: 

    43-54
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    53
  • دانلود: 

    0
چکیده: 

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 53

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
اطلاعات دوره: 
  • سال: 

    1401
  • دوره: 

    26
  • شماره: 

    104
  • صفحات: 

    77-85
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    115
  • دانلود: 

    6
چکیده: 

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.

شاخص‌های تعامل:   مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

بازدید 115

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesدانلود 6 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesاستناد 0 مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resourcesمرجع 0
litScript
telegram sharing button
whatsapp sharing button
linkedin sharing button
twitter sharing button
email sharing button
email sharing button
email sharing button
sharethis sharing button