فیلتر های جستجو: فیلتری انتخاب نشده است.
نمایش ۱۴۱ تا ۱۶۰ مورد از کل ۲٬۷۸۱ مورد.
۱۴۱.

Technopedagogical evaluation of a digital device for the continuing training of teachers in Morocco: Case of the e-takwine platform(مقاله علمی وزارت علوم)

کلید واژه ها: E-takwine Digital continuing Technopedagogical evaluation Ergonomic evaluation

حوزه های تخصصی:
تعداد بازدید : 199 تعداد دانلود : 743
The Moroccan education system has undergone several reforms in recent years, thus concluded by the strategic vision, especially project 9 which has valued the continuing training of educational actors and framework law 51-17 in articles 34 and 35 which valued the continuous development of skills of teachers in Morocco, In this perspective the Ministry of National Education has reserved significant budgets to operationalize the continuing training of teachers on the one hand and it is committed to a Moroccan-American partnership within the framework of the Millennium project Challenge Account-Morocco. By committing to the establishment-challenge project, the ministry has set up a set of priorities, in particular the operationalization of the digital strategy for schools declared by decree 2.20.474, thus benefiting from the contribution of digital and while trying to overcome some constraints related to face-to-face training, a new regime that is continuous online training is implemented, it is the e-takwine platform. In addition, given the interest that evaluation represents for maintaining and improving the quality of a digital training device, we opted in this research, by evaluating the technopedagogical modality of e-takwine reserved at the start of the continuing training of novice teachers in Morocco and then developed for the training of all second cycle teachers from the start of the 2021-2022 school year. The sampling of our research is represented by 362 professors from the region of Fés –Meknes belonging to two different teaching cycles, and who followed their training for three months in six training modules in a more or less assiduous manner, Similarly, to conduct our survey, we administered two online questionnaires to participating teachers, in order to judge the functionality and ergonomics of the platform being researched. Finally, confirming to us that despite the satisfaction of the majority of participants with respect to the functional quality and the contribution of the device, some difficulties were noted at the levels: technical (compatibility, accessibility), functional or even with regard to technological knowledge.
۱۴۲.

Comparison between the Conventional Partial Least Squares (Pls) and the Robust Partial Least Squares (Rpls-Sem) Through Winsorization Approach(مقاله علمی وزارت علوم)

کلید واژه ها: Partial Least Square-Path Modelling (PLS-SEM) Robust Partial Least Squares (RPLS-SEM) Structural Equation Modelling (SEM) Winsorization Steam Power Plant SmartPLS3

حوزه های تخصصی:
تعداد بازدید : 38 تعداد دانلود : 207
This study compared the performance of the partial least squares-structural equation modelling (PLS-SEM) and the robust partial least squares -structural equation modelling (RPLS-SEM) methods through Winsorisation approach The inputs and the outputs used in this model were based on the electricity generation data, derived from the Al-Zawiya Steam Power Plant, Libya. Furthermore, the researchers compared the novel RPLS-SEM approach with the traditional PLS-SEM approach and noted that the novel RPLS-SEM method was more efficient compared to PLS-SEM.
۱۴۳.

طراحی مدل هم آفرینی دانش مشتریان در صنعت بیمه(مقاله علمی وزارت علوم)

کلید واژه ها: هم آفرینی دانش مشتریان صنعت بیمه رویکرد کیفی مدلسازی ساختاری - تفسیری

حوزه های تخصصی:
تعداد بازدید : 681 تعداد دانلود : 668
دانش یک عنصر کلیدی برای پرورش نوآوری محصول و خدمت می باشد. یکی از جدیدترین مفاهیم مطرح شده برای استفاده از منابع دانش خارج از سازمان، مفهوم هم آفرینی دانش است. هم آفرینی دانش به معنای فرایندهای همکاری داوطلبانه میان مشتریان، پژوهشگران و مدیران سازمانی جهت خلق دانش پیرامون محصولات و خدمات است. مهم ترین بازیگری که در خلق مشترک دانش، نقش ایفا می کند، مشتری می باشد. مبحث هم آفرینی دانش مشتریان هنوز در صنعت بیمه کشورمان، به خوبی شناخته نشده است، لذا شناسایی مؤلّفه های آن و تعیین قدرت نفوذ هر یک از آنها یکی از چالشهای شرکتهای بیمه کنونی است. از این رو هدف پژوهش حاضر، شناسایی مؤلّفه-های هم آفرینی دانش مشتریان و ارائه مدل روابط مؤلفه های هم آفرینی دانش مشتریان در صنعت بیمه کشور می-باشد. این پژوهش بر اساس هدف بنیادی و بر اساس روش گردآوری داده ها توصیفی- پیمایشی می باشد. جهت شناسایی مؤلفه های پژوهش، مصاحبه هایی با 14 نفر از خبرگان شامل مدیران صنعت بیمه و اعضای هیئت علمی صاحب نظر در این زمینه به عمل آمد و جهت ارائه مدل روابط مؤلفه ها، پرسشنامه استاندارد رویکرد ساختاری- تفسیری، که مبتنی بر مقایسات زوجی می باشد، توسط 10 نفر از خبرگان تکمیل گردید.بر اساس نتایج حاصل از مصاحبه های نیمه ساختاریافته با خبرگان، 51 بعد و 7 مؤلّفه استخراج شدند که توسط رویکرد مدلسازی ساختاری- تفسیری، در 5 سطح طبقه بندی گردیدند. در این مدل، مؤلفه «زیرساختهای فن آوری اطلاعات و ارتباطات»، در پایین ترین سطح قرار دارد که نشاندهنده برخورداری از بالاترین قدرت نفوذ در میان سایرمؤلفه ها می باشد و بدین معنی است که تغییر و توسعه این مؤلفه، موجب تغییر و توسعه سایر مؤلفه های مدل خواهد شد. همچنین مؤلفه های «ایجاد انگیزش برای مشتریان» و «اعتمادسازی» که در بالاترین سطح مدل قرار دارند، تأثیرپذیرترین مؤلفه های مدل محسوب می گردند. بنابراین جهت اجرای بهینه فرایند هم آفرینی دانش مشتریان در شرکتهای بیمه، می بایست تقویت مؤلفه های سطوح پایینتر مدل که دارای قدرت نفوذ بیشتری می-باشند، در اولویت تصمیم گیری های مدیریتی قرار گیرد.
۱۴۴.

Mapping Grayscale Images to Colour Space Using Deep Learning(مقاله علمی وزارت علوم)

نویسنده:

کلید واژه ها: Convolutional Neural Networks (CNN) Convolution RGB CIELAB (Lab) deep neural networks Feature vector Prediction sampling

حوزه های تخصصی:
تعداد بازدید : 834 تعداد دانلود : 715
People are used to exploring grayscale images in their family albums but it is difficult to grasp the reality without colours. Luckily, with advancements in Machine Learning it has been possible to solve problems previously thought impossible. The authors aim to automatically colourize grayscale images using a subset of Machine Learning called Deep Learning. The system will be trained on an image dataset and given an input grayscale image the model will be able to assign aesthetically believable colours. A grayscale photograph has been provided; our approach solves the problem of visualizing a reasonable colour version of the grayscale picture. This issue is undoubtedly under controlled; therefore earlier methods to this problem have either counted majorly on user interaction or it leads to in unsaturated colourizations. The authors put forward a completely automatic approach that will try to produce realistic and vibrant colourizations as much as possible. The proposed system has been applied as a feed-forward in a Convolutional Neural Network and has been trained on over twenty thousand colour images currently.
۱۴۵.

Moving Vehicles Detection and Tracking on Highways and Transportation System for Smart Cities(مقاله علمی وزارت علوم)

کلید واژه ها: Background subtraction Transportation Systems Highways Moving Vehicle De-tection Post processing

حوزه های تخصصی:
تعداد بازدید : 310 تعداد دانلود : 743
The real-time video surveillance system has become an integral part of our life and Highways play a very crucial role in transportation. For a transportation system to work, the management of highways are necessary. It also prevents accident and other challenging issues on highways. Various machine learning and artificial intelligence based techniques are evolving with numerous advancement in this domain. These algorithms are efficient and very less time consuming. So the use of machine learning and artificial intelligence in transportation systems and highways could be very beneficial. In this paper, various approaches related to moving vehicle detection for the transportation system especially for highways are considered. The literature also reveals for existing research for the machine learning and AI based methodologies to resolve more complex real-time problems. The proposed work is also compared with the existing peer methods and demonstrated better performance achieved experimentally.
۱۴۶.

Machine Learning Algorithms for Early Fall Detection of Elderly People(مقاله علمی وزارت علوم)

کلید واژه ها: elderly people Machine Learning Fall Detection

حوزه های تخصصی:
تعداد بازدید : 460 تعداد دانلود : 38
Falls are a serious concern among the elderly people, causing severe physical pain to them and placing a strain on medical infrastructure. The global elderly population is expected to grow significantly in the coming years, as advances in healthcare allow lifespans to increase globally. This will bring more chances for falls to occur. With this in mind, there is a need for new research to be conducted on finding ways to reduce this problem. One area which shows promise is the use of Machine Learning to perform fall detection. Machine Learning is a rapidly growing field, and it has many applications in various fields such as finance, technology and medicine. When it comes to fall detection, Machine Learning systems are often able to detect falls much better and efficiently than a human can, given the same input data. The goal of this paper is to conduct a survey study on the main and most common machine learning algorithms implemented in the field of early fall detection for elderly people and the characteristics. The paper will discuss the different types of fall detection systems, algorithms, tools, datasets, applications, and challenges.  By conducting this research, a better understanding of the context, progress and trends in the field will be possible so that future research will have a guide to build upon.
۱۴۷.

Challenges of using blockchain technology in the international markets(مقاله علمی وزارت علوم)

کلید واژه ها: Blockchain International Markets meta-synthesis method Challenges

حوزه های تخصصی:
تعداد بازدید : 699 تعداد دانلود : 22
Despite all blockchain's advantages, it has experienced some challenges and disadvantages. Identifying these challenges and minimizing them are important steps in advancing the goals of this technology. The purpose of this study is to investigate and identify the challenges of using blockchain technology in international markets with regard to the risks of such newfound technologies. This is an applied research in terms of purpose and a mixed research in terms of methodology. The effective factors in using blockchain technology have been discovered by the meta-synthesis method at first; then the ranking of these factors has been done by the fuzzy pairwise comparison. A systematic search was performed in the database of Science Direct, Emerald, and Google Scholar. Also, the seven-step method of Sandlowski and Barroso (2007) was applied. All the related articles and the challenges of using blockchain in international markets were identified and coded. The comparison method between the two coders was used to adjust the reliability and the kappa coefficient was used to calculate the correlation coefficient between the two codes. The findings of the extracted sources were finally proposed and 41 challenges were classified into 6 categories of technical, educational, structural, market, infrastructure and legal which divided in both internal and external areas.
۱۴۸.

STCP: A Novel Approach for Congestion Control in IoT Environment(مقاله علمی وزارت علوم)

کلید واژه ها: Internet of Things protocol Internet Computer Network

حوزه های تخصصی:
تعداد بازدید : 805 تعداد دانلود : 937
The main idea of IoT is to connect several objects to each other through Internet. In the field of Computer Network the main problem identified by researchers is network congestion. Now a day’s network congestion is increasing very rapidly because IoT connect a huge number of devices to internet. A transport layer protocol TCP (Transmission Control Protocol) is accountable for network congestion control. The behavior of TCP is not stable as it takes long time to fill the available capacity of the network. It also continuously keeps assessing the capacity of data transmission through increasing the limits.TCP drops its data transmission rate aggressively when packets are dropped, which significantly reduces the throughput. This paper suggests a new approach, stable transmission control protocol for IoT applications. The experimental results show that stable transmission control protocol achieves better performance in terms of goodput.
۱۴۹.

IPTV Access Methods with RADIUS-Server Authorization(مقاله علمی وزارت علوم)

کلید واژه ها: Authorization IGMP IP-TV Multicast RADIUS mathematical model

حوزه های تخصصی:
تعداد بازدید : 438 تعداد دانلود : 684
Security is one of the most important aspects of data transmission. To provide controlled access to the network, user authorization and authentication are often used with the help of an AAA server. RADIUS servers provide users with access to data, user authentication, and configuration information. When designing networks with such access control method implementation, it is necessary to understand how the characteristics of the communication channel affect the switching time of IP-TV channels, and therefore the overall quality of IP-TV services. The principles of the main protocols for IP-TV using a RADIUS server are described. The main parameters of the communication channel were identified. The mathematical model and the graphs demonstrate how IP-TV service access time depends on telecommunication channel parameters. The results of a practical experiment are presented to prove the formed mathematical model. The results of a practical experiment and theoretical calculation are compared.
۱۵۰.

طراحی مدل مفهومی فریب ادراک شده تبلیغات شبکه های اجتماعی با رویکرد داده بنیاد(مقاله علمی وزارت علوم)

کلید واژه ها: فریب ادراک شده تبلیغات شبکه های اجتماعی رویکرد داده بنیاد

حوزه های تخصصی:
تعداد بازدید : 51 تعداد دانلود : 863
رشد روزافزون شبکه های اجتماعی و پررنگ شدن نقش آنها در دنیای تجارت و پیرو آن، در تبلیغات از یک طرف و سهولت انجام فریب در چنین رسانه های نوظهوری از طرف دیگر، باعث افزایش تبلیغات فریبنده و ادعاهای دروغین در این فضای ارتباطی و تجاری شده است؛ به گونه ای که برای مخاطبان این شبکه ها، تشخیص تبلیغات صادقانه از فریبکارانه دشوار بوده و همین مساله باعث ایجاد بی اعتمادی به تبلیغات در شبکه های اجتماعی و کاهش فروش می شود. به همین علت و در همین راستا ، پژوهش حاضر با هدف ارائه الگویی در زمینه فریب ادراک شده تبلیغات شبکه های اجتماعی و با بهره گیری از رویکرد داده بنیاد انجام شده است. بدین منظور از مصاحبه های عمیق و نیمه ساختار یافته استفاده شد که در میان 15 نفر از افرادی که تجربه فریب در خرید از شبکه های اجتماعی را داشته اند، انجام پذیرفت. داده ها نیز با استفاده از کدگذاری باز، انتخابی و نظری و نرم افزار MAXQDA2020 تحلیل شد و در نهایت، الگوی مفهومی با 8 مقوله اصلی، 15 مقوله فرعی و 69 مفهوم طراحی و مشخص شد که سودمندی ادراک شده شبکه اجتماعی و ویژگی های تبلیغات این شبکه ها به عنوان علل، و ویژگی رسانه به عنوان عامل همبسته با این علل در شکل گیری فریب ادراک شده اثرگذارند. در این میان، دانش مصرف کننده و اعتماد ادراک شده نقش اقتضائات را ایفا می کنند. نگرش مصرف کننده نیز به عنوان شرایط احراز شناخته می شود. ویژگی مصرف کننده نیز زمینه ساز رویداد چنین فرآیندی است که درنهایت، به شکل گیری پدیده ای به نام آسیب به روحیات مصرف کننده منجر می شوند، که پیامد فردی فریب ادراک شده تبلیغات شبکه های اجتماعی به حساب می آید.
۱۵۱.

The relationship between Gamification and Sustainability of small and medium enterprise: Explaining the role of digital transformation in open innovation and value co-creation(مقاله علمی وزارت علوم)

کلید واژه ها: Gamification Digital Transformation Open innovation Co-creation Corporate Sustainability

حوزه های تخصصی:
تعداد بازدید : 78 تعداد دانلود : 704
Accelerating digital transformation and the basic needs of businesses to adapt to environmental transformations and complexities have doubled the necessity for extensive stakeholder interactions. Gamification is a powerful tool that facilitates stakeholder interaction and a common understanding of the vision and contributes to the sustainability of businesses. Businesses' sustainability in the digital transformation age depends on the continuous interaction of stakeholders and a comprehensive understanding of all the business pillars, which will be possible through the flow of ideas inside and outside the workplace and by providing innovative processes. In this regard, this study explores the effect of gamification on corporate sustainability by explaining the role of digital transformation, open innovation, and value co-creation. The statistical population of this study comprises top managers and experts in e-businesses who use gamification in their processes. The statistical sample included 117 managers and experts active in this field, and they were selected through convenience sampling. The data collection tool was a questionnaire reliability of which was 0.763 using Cronbach's alpha. Using Smart PLS software, the gathered data were analyzed by structural equation modeling (SEM). Gamification, with a factor of 74%, has a positive effect on open innovation, while a factor of 85% has a positive effect on digital transformation. Gamification, both directly and indirectly, creates value co-creation in businesses, and finally, value co-creation at 78% affects corporate sustainability.
۱۵۲.

Blockchain Capabilities to Improve the Productivity of Maritime Logistics Processes: Review, Taxonomy, Open Challenges and Future Trends(مقاله علمی وزارت علوم)

کلید واژه ها: Maritime logistics Blockchain technology Systematic review Open challenges Future trends

حوزه های تخصصی:
تعداد بازدید : 311 تعداد دانلود : 230
This paper surveys recent publications on maritime logistics with a focus on blockchain capabilities. Maritime logistics plays an important role in global trade and an important part of the global economy depends on it. The growth of world trade has led to the creation of various systems that are prone to error and fraud, the current supply chain needs to connect and trust many intermediaries which not only increase abuse and errors but also it will increase cost and time in the chain. Hence, transparency and stability are highly demanded. On the other hand, with the onset of the fourth industrial revolution, a new approach called “blockchain” was introduced which can have very important applications in maritime logistics. As this novel technology is in its early stages of development, its applications in maritime logistics have not been specifically investigated. So, this paper takes a deep dive into blockchain technology capabilities for maritime logistics by reviewing relevant scientific journal papers since 2014. The paper also discusses and challenges the current operational paradigms and by categorizing efforts, provides a taxonomy of research topics in maritime logistics. Finally, the paper in addition to presenting challenges, identifies new avenues for academic research based on current trends and development.
۱۵۳.

Comparing the Performance of Pre-trained Deep Learning Models in Object Detection and Recognition(مقاله علمی وزارت علوم)

کلید واژه ها: deep learning Image recognition Object Detection Pre-trained Models

حوزه های تخصصی:
تعداد بازدید : 744 تعداد دانلود : 859
The aim of this study is to evaluate the performance of the pre-trained models and compare them with the probability percentage of prediction in terms of execution time. This study uses the COCO dataset to evaluate both pre-trained image recognition and object detection, models. The results revealed that Tiny-YoloV3 is considered the best method for real-time applications as it takes less time. Whereas ResNet 50 is required for those applications which require a high probability percentage of prediction, such as medical image classification. In general, the rate of probability varies from 75% to 90% for the large objects in ResNet 50. Whereas in Tiny-YoloV3, the rate varies from 35% to 80% for large objects, besides it extracts more objects, so the rise of execution time is sensible. Whereas small size and high percentage probability makes SqueezeNet suitable for portable applications, while reusing features makes DenseNet suitable for applications for object identification.
۱۵۴.

Design, Realization and Measurements of Printed Patch Antenna with Circular Slots for UWB and IoT Applications(مقاله علمی وزارت علوم)

کلید واژه ها: IoT Patch Antenna Slots UWB 5G

حوزه های تخصصی:
تعداد بازدید : 976 تعداد دانلود : 674
This paper presents the design, simulation and realization of a patch antenna for IOT applications. The patch antenna consists of a radiating element printed on one face of a dielectric substrate, when the ground plane is placed on the other face. In this work, two techniques are used to design a miniaturized patch antenna: the set-up of slots on the radiating element and the use of defective ground plane. Also, the slot’s radius and Length of inset point effects on the performances of the antenna is illustrated. All the simulated results are performed with FEKO, a solver based on a Moments Method and measurement is made using Vector Network Analyzer Anritsu MS2026C. The propose antenna resonates in three frequency bands 3.91, 4.86 and 5.16GHz for different characteristics such as radiation pattern, gain, return loss, which makes it suitable for many wireless communication applications such as IoT applications.
۱۵۵.

مدل کارآفرینی شرکتی بین المللی اپراتورهای تلفن همراه ایران(مقاله علمی وزارت علوم)

کلید واژه ها: کارآفرینی شرکتی کارآفرینی بین المللی کارآفرینی شرکتی بین المللی صنعت ارتباطات ایران

حوزه های تخصصی:
تعداد بازدید : 757
پیشرفت فناوری و پیچیدگی اقتصاد محیطی بسیار رقابتی را ایجاد کرده است که در آن شرکت ها به طور مداوم با تغییرات چشمگیر بازار و ظهور انواع فرصت های تجاری مواجه اند. در چنین محیطی انطباق با نوآوری ها و تغییرات و تحولات برای شرکت ها جهت دستیابی به موفقیت تجاری پایدار امری ضروری است. فعالیت های کارآفرینی شرکتی بین المللی می تواند توانایی شرکت در شناخت و بهره برداری از فرصت های بازارهای بین المللی پیش از رقبای خود افزایش دهد. این پژوهش از نظر هدف کاربردی و از نظر روش آمیخته اکتشافی (کیفی- کمی) است. جامعه آماری آن در بخش کیفی شامل 17 نفر که با روش گلوله برفی و در بخش کمی، شامل 389 نفر با روش نمونه گیری تصادفی است. ابزار گردآوری داده ها در بخش کیفی، مصاحبه و در بخش کمی پرسشنامه است. روش تحلیل داده ها در بخش کیفی، شامل کدگذاری در سه گام کدگذاری اولیه، کدگذاری باز و کدگذاری محوری است و در بخش کمی تحلیل عاملی تاییدی و معادلات ساختاری با استفاده از نرم-افزار SPSS و Amos می باشد. یافته های پژوهش در بخش کیفی نشان می دهد که پنج دسته عوامل بر کارآفرینی شرکتی بین المللی اثرگذارند که عبارتند از عوامل بین المللی، عوامل ملی، فردی، سازمانی و ویژگی های صنعت. در مجموع در این پژوهش در بخش کیفی 6 مقوله اصلی، 24 مقوله فرعی و94 مفهوم شناسایی شد. نتایج بخش کمی نشان میدهد که این عوامل 74 درصد بر دستاوردهای کارآفرینی شرکتی بین المللی اثرگذارند و به ترتیب عوامل سازمانی، بین المللی، فردی و ملی و ویژگیهای صنعت بیشترین تا کمترین اثرگذاری را بر کارآفرینی شرکتی بین المللی دارند.
۱۵۶.

Experience of Land Use Development Planning at the Local (Municipal) Level in the European Union(مقاله علمی وزارت علوم)

کلید واژه ها: Landscapes planning Sustainable Development Land management international standards authorities

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تعداد بازدید : 752 تعداد دانلود : 833
The article examines the development of theoretical and methodological approaches and practical recommendations for improving the ecological and economic foundations of land management and land management at the local level in the example of the European Union. In practice, regional, spatial, strategic, landscape, and integrated types of land use development planning are most often used in the European Union. With the development of the market economy of European society, environmental problems arose, which prompted the development of landscape planning, both landscape-ecological and socio-economic aspects of territorial development. The experience of landscape planning was introduced in Germany, which later became used in almost all European countries. The study and direct comparison of existing landscape planning systems in different European countries, and their reduction to several basic features are not possible and impractical because these systems are very different. This is due to a number of reasons: history, features of political systems, cultural traditions, level of economic development, the nature of legal systems and property relations. Landscape planning in the European Union is going to be one of the tensest areas of activity in the future, and Ukraine must take an active part in this process.
۱۵۷.

Q-Learning Enabled Green Communication in Internet of Things(مقاله علمی وزارت علوم)

کلید واژه ها: Energy balancing QRL Link Quality Learning rate Internet of Things

حوزه های تخصصی:
تعداد بازدید : 788 تعداد دانلود : 869
Limited energy capacity, physical distance between two nodes and the stochastic link quality are the major parameters in the selection of routing path in the internet of things network. To alleviate the problem of stochastic link quality as channel gain reinforcement based Q-learning energy balanced routing is presented in this paper. Using above mentioned parameter an optimization problem has been formulated termed as reward or utility of network. Further, formulated optimization problem converted into Markov decision problem (MDP) and their state, value, action and reward function are described. Finally, a QRL algorithm is presented and their time complexity is analyses. To show the effectiveness of proposed QRL algorithm extensive simulation is performed in terms of convergence property, energy consumption, residual energy and reward with respect to state-of-art-algorithms.
۱۵۸.

نقش تحلیل کسب وکار دانشی در مدیریت امنیت داده های رایانش ابری (نمونه پژوهش: شرکت های دانش بنیان پارک علم و فناوری دانشگاه تهران)(مقاله علمی وزارت علوم)

کلید واژه ها: رایانش ابری شرکت های دانش بنیان عقلانیت تصمیم گیری فرهنگ داده محور کسب و کار دانشی مدیریت امنیت داده ها

حوزه های تخصصی:
تعداد بازدید : 831 تعداد دانلود : 728
رایانش ابری آخرین پاسخ فناوری برای رفع نیاز انسان به محاسبات سنگین است. این پژوهش به بررسی تأثیر تجزیه وتحلیل کسب وکار دانشی بر مدیریت امنیت داده های رایانش ابری با توجه به نقش میانجی فرهنگ داده محور و عقلانیت تصمیم گیری امنیت داده های رایانش ابری پرداخته است؛ لذا پژوهش حاضر از حیث هدف یک پژوهش کاربردی بوده و از حیث گردآوری داده ها از روش توصیفی- پیمایشی استفاده شده است. جامعه آماری پژوهش حاضر، خبرگان حوزه رایانش ابری شرکت های دانش بنیان در پارک علم و فناوری تهران (دانشگاه تهران) به تعداد 135 نفر بوده است. در پژوهش حاضر به علت محدود بودن تعداد اعضای جامعه آماری (135 نفر) از روش سرشماری برای جمع آوری داده ها استفاده شده است. ابزار گردآوری داده پرسشنامه های استاندارد از وانگ و همکاران (2020)، کائو (2015)، دیلن و دمیرکان (2013)، کایرن و همکاران (2012)، کایرن و شوکلی (2011)، چانگ و لین (2007) است که پایایی و روایی آن بررسی و مورد تأیید قرار گرفت. تجزیه وتحلیل داده ها نیز در دو بخش آمار توصیفی و استنباطی انجام شد. جهت آزمون فرضیه ها و برازش مدل، از تکنیک مدل سازی معادلات ساختاری و رویکرد حداقل مربعات جزئی و نرم افزار Smart PLS2 استفاده شد. نتایج نشان داد که تجزیه وتحلیل کسب وکار دانشی بر فرهنگ داده محور و فرهنگ داده بر عقلانیت تصمیم گیری داده های رایانش ابری تأثیر مثبت و معناداری دارد. همچنین عقلانیت تصمیم گیری داده های رایانش ابری بر مدیریت امنیت داده های رایانش ابری تأثیر مثبت معنادار دارد.
۱۵۹.

Presenting a Model for the use of the Internet of Things in the Iranian Knowledge-based Companies(مقاله علمی وزارت علوم)

کلید واژه ها: Internet of Things Knowledge-Based Companies grounded theory

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تعداد بازدید : 721 تعداد دانلود : 524
The purpose of the present study is to present a model for the use of the Internet of Things in Iranian knowledge-based companies. From a purpose point of view, this research can be classified as applied research and in terms of data collection, it can be categorized as a qualitative and quantitative study. The main approach for achieving the model of using the Internet of Things is the grounded theory methodology which is based on a paradigmatic model. The research population for the qualitative phase is comprised of 25 executives and practitioners of knowledge-based companies who are somehow specialized in Internet of Things topics. The sample of this study was selected using the snowball sampling method and Cochran's formula for finite communities among all the managers and technology experts working in knowledge-based companies. After careful analysis of the interviews, 59 extracted concepts were identified in 5 main categories and 13 subcategories. Management requirements, customer requirements, and resistance economics give rise to the Internet of Things in knowledge-based companies.  The characteristics of the company, the characteristics of the human resources and the characteristics of the managers can provide a suitable ground for using the Internet of Things. And the conditions in the country, international pressures and international cooperation can be among the intermediary factors influencing the use of the Internet of Things. Raw materials and infrastructure can also be effective strategies for using the Internet of Things. Using the Internet of Things, customer-related factors, international collaborations, and expected results can be expected in knowledge-based companies.
۱۶۰.

Opinion Mining on Viet Thanh Nguyen’s The Sympathizer Using Topic Modelling and Sentiment Analysis(مقاله علمی وزارت علوم)

کلید واژه ها: Opinion Mining Sentiment Analysis Spatial Analysis The Sympathizer

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تعداد بازدید : 496 تعداد دانلود : 383
In attempts to examine the mapped spaces of a literary narrative, various quantitative approaches have been deployed to extract data from texts to graphs, maps, and trees. Though the existing methods offer invaluable insights, they undertake a rather different project than that of literary scholars who seek to examine privileged or unprivileged representations of certain spaces. This study aims to propose a computerized method to examine how matters of space and spatiality are addressed in literary writings. As the primary source of data, the study will focus on Viet Thanh Nguyen’s The Sympathizer (2015), which explores the lives of Vietnamese diaspora in two geographical locations, Vietnam, and America. To examine the portrayed spatial relations, that is which country is privileged over the other, and to find out the underlying opinion about the two places, this study performs topic modelling with Latent Dirichlet Allocation (LDA) and Latent Semantic Analysis (LSA) by using TextBlob. In addition, Python is used as the analytical tool for this project as it supports two LDA algorithms: Gensim and Mallet. To overcome the limitation that the performance of the model relies on the available libraries in Python, the study employs machine learning approach. Even though the results indicated that both geographical spaces are portrayed slightly positively, America achieves a higher polarity score than Vietnam and hence seems to be the favored space in the novel. This study can assist literary scholars in analyzing spatial relations more accurately in large volumes of works.

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