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مرکز اطلاعات علمی SID1
اسکوپوس
دانشگاه غیر انتفاعی مهر اروند
ریسرچگیت
strs
Issue Info: 
  • Year: 

    1379
  • Volume: 

    -
  • Issue: 

    33
  • Pages: 

    0-0
Measures: 
  • Citations: 

    1
  • Views: 

    248
  • Downloads: 

    31
Keywords: 
Abstract: 

Yearly Impact:

View 248

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Issue Info: 
  • Year: 

    2019
  • Volume: 

    18
  • Issue: 

    104
  • Pages: 

    31-41
Measures: 
  • Citations: 

    0
  • Views: 

    519
  • Downloads: 

    276
Abstract: 

In the present study, the problems of salt solution sedimentation on heat exchangers, their modelling procedure, and the heat exchanger Fouling removal Methods based on the related published investigation are reported. The salt solutions are used in many technological industries, and the sedimentation of stable salts is the main limitation of using them, especially in the high-temperature liquid-vapor system. The Methods of these salts removing is Online and offline Fouling cleaning. Each of these Methods has their advantageous and disadvantageous. In the practical application, there are multiple criteria considering different conditions. Although, based on the heat exchanger design condition, the solid salt sedimentation decrement can be improved the system Fouling problems.

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Issue Info: 
  • Year: 

    2016
  • Volume: 

    6
  • Issue: 

    1
  • Pages: 

    163-175
Measures: 
  • Citations: 

    0
  • Views: 

    658
  • Downloads: 

    221
Abstract: 

Introduction: Iran is one of the main producers of kiwifruit in the world. Unfortunately, the sorting and grading of the kiwifruits are manual, which is a time consuming and labor intensive task. Due to the lack of appropriate devices for sorting and grading of kiwifruit based on the quality parameters, only 10% of total production is exported (Mohammadian & Esehaghi Teymouri, 1999)....

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گارگاه ها آموزشی
Issue Info: 
  • Year: 

    2012
  • Volume: 

    -
  • Issue: 

    SUP. 94-95
  • Pages: 

    27-42
Measures: 
  • Citations: 

    0
  • Views: 

    45202
  • Downloads: 

    573
Abstract: 

Objective Influence dimensions of service quality in Online stores (website design, reliability, trust, personalization, responsiveness) on the overall service quality, customer satisfaction and customer’s perception which lead to purchase intentions, was reviewed.Methodology descriptive (type of survey) study, society is people who have experienced Online shopping. Sampling Method was simple random sample, and sample volume was 385 person. Data collection tool was a questionnaire, and Cronbach’s alpha coefficient and Lisrel software is used For analyzing.Research results website design and Personalization in Online store, have not influence on purchase intention. Trust, reliability, and responsiveness in an Online store positively influences purchase intentions.Research Limitations non- cooperation some Online shops for insert questionnaire in their stores, and Not commonly Online shopping among people.Managerial Implications Managers of Online stores to set up an Online shop mostly focused to put customer’s confidence. Recommended to administrators of Online stores is more attention on the security of their ownsaleswebsite.Originality/Value All stages of the research on the web and have been done Online form.

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Author(s): 

YAHYAZADEH MOSA | ABADI MAHDI

Issue Info: 
  • Year: 

    2012
  • Volume: 

    4
  • Issue: 

    1
  • Pages: 

    51-62
Measures: 
  • Citations: 

    0
  • Views: 

    651
  • Downloads: 

    106
Abstract: 

Botnets are recognized as one of the most dangerous threats to the Internet infrastructure. They are used for malicious activities such as launching distributed denial of service attacks, sending spam, and leaking personal information. Existing botnet detection Methods produce a number of good ideas, but they are far from complete yet, since most of them cannot detect botnets in an early stage of their lifecycle; moreover, they depend on a particular command and control (C&C) protocol. In this paper, we address these issues and propose an Online unsupervised Method, called BotOnus, for botnet detection that does not require a priori knowledge of botnets. It extracts a set of flow feature vectors from the network traffic at the end of each time period, and then groups them to some flow clusters by a novel Online fixed-width clustering algorithm. Flow clusters that have at least two members, and their intra-cluster similarity is above a similarity threshold, are identified as suspicious botnet clusters, and all hosts in such clusters are identi ed as bot infected. We demonstrate the effectiveness of BotOnus to detect various botnets including HTTP-, IRC-, and P2P-based botnets using a testbed network. The results of experiments show that it can successfully detect various botnets with an average detection rate of 94: 33% and an average false alarm rate of 3: 74%.

Yearly Impact:

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Author(s): 

RAZAVI S.M. | KABIR E.

Issue Info: 
  • Year: 

    2005
  • Volume: 

    17
  • Issue: 

    2
  • Pages: 

    65-82
Measures: 
  • Citations: 

    1
  • Views: 

    883
  • Downloads: 

    225
Abstract: 

In this paper, a Method for Online recognition of isolated Farsi characters is presented. These characters are divided into 12 groups based on their dots and signs. First, the dots or other signs of the input character are recognized and the related group to that character is chosen. If there is only one member in that group, its class is assigned to the input character, otherwise, the body of input character is compared to those of the group members and a member with minimum distance to it is found. The class of this member is assigned to the input character. The proposed Method was tested on a database of 4144 characters from different writers. The correct recognition rate was 93.3%. If the characters are written in a slightly constraint style, the correct recognition rate will reach to 98%. For this purpose, the writer can adapt its writing style with the system requirements.

Yearly Impact:

View 883

Download 225 Citation 1 Refrence 1
strs
Author(s): 

RAZAVI S.M. | KABIR E.

Issue Info: 
  • Year: 

    2005
  • Volume: 

    3
  • Issue: 

    2
  • Pages: 

    63-72
Measures: 
  • Citations: 

    0
  • Views: 

    1227
  • Downloads: 

    284
Abstract: 

In this paper, a Method for Online recognition of Farsi subwords is presented. First, the dots and other signs of the input subword and their relative locations are recognized and the related group to that subword is chosen. If there is only one member in that group, its class is assigned to the input subword, otherwise, the subword body is compared to those of the group members and the subword with minimum distance to the input subword is found. The recognition system also proposes a maximum of nine subwords in the next ranks. The proposed Method was tested on a database of 11 samples of 1000 subwords from different writers. The correct recognition rate for the first choice was 74.95%. It reached to 97.87% for the top 10 choices.

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Issue Info: 
  • Year: 

    1389
  • Volume: 

    2
  • Issue: 

    8
  • Pages: 

    83-95
Measures: 
  • Citations: 

    3
  • Views: 

    1437
  • Downloads: 

    249
Abstract: 

هدف: هدف پژوهش حاضر بررسی میزان آشنایی دانشجویان دانشگاه علوم پزشکی بابل با پایگاه های اطلاعاتی پیوسته و همچنین میزان استفاده آنها از این پایگاه هاست.روش: روش پژوهش پیمایشی از نوع توصیفی و ابزار گردآوری اطلاعات پرسشنامه می باشد.از کل جامعه پژوهش، 340 نفر به روش تصادفی طبقه ای انتخاب شدند و پرسشنامه بین آنها توزیع شد.در نهایت 350 پرسشنامه مورد تجزیه و تحلیل قرار گرفت. داده های به دست آمده از پژوهش با روشهای آمار توصیفی و آزمونهای آماری کای دو و ضریب همبستگی اسپیرمن به کمک نرم افزار Spss16 مورد تجزیه و تحلیل قرار گرفتند.یافته ها: نتایج پژوهش نشان داد بین مقطع تحصیلی دانشجویان و میزان آشنایی آنها با پایگاه های اطلاعاتی پیوسته و همچنین بین رشته تحصیلی دانشجویان و میزان آشنایی آنها با پایگاه های اطلاعاتی پیوسته رابطه معناداری وجود دارد. (34.8 درصد) دانشجویان اصلا با پایگاه های اطلاعاتی آشنایی نداشته و (42 درصد) از آنها نیز از پایگاه ها استفاده نمی کنند. با توجه به یافته های به دست آمده، بین میزان آشنایی دانشجویان با پایگاه های اطلاعاتی و میزان استفاده آنها از این پایگاه ها رابطه معناداری وجود دارد. از بین پایگاه های اطلاعاتی پیوسته"Science direct" ، با میانگین آشنایی (2.67 درصد) و میانگین استفاده (2.39 درصد) شناخته شده ترین و پر استفاده ترین پایگاه اطلاعاتی در بین دانشجویان است. بین مقطع تحصیلی دانشجویان با میزان دسترسی آنها به پایگاه های اطلاعاتی و بین رشته تحصیلی دانشجویان و میزان دسترسی آنها به پایگاه ها رابطه معناداری مشاهده شد. میزان دسترسی دانشجویان به پایگاه های اطلاعاتی با (50.2 درصد) در حد متوسط است. حدود نیمی از دانشجویان به طور متوسط با اینترنت و ابزارهای جستجوی وب آشنایی دارند. و این بیانگر این است که بین میزان آشنایی دانشجویان با پایگاههای اطلاعاتی و میزان آشنایی آنها با اینترنت رابطه معناداری وجود دارد. بیشترین درصد (36.7 درصد) دانشجویان، آشنایی با نحوه جستجو را به عنوان مهمترین عامل در استفاده موثر از پایگاه ها اعلام کردند.نتیجه گیری: اکثر دانشجویان دانشگاه علوم پزشکی بابل با پایگاههای اطلاعاتی پیوسته اصلا آشنایی نداشته ویا آشنایی بسیارکمی دارند و همچنین از آنها استفاده نمی کنند. که این امر به دلیل عدم اطلاع رسانی مناسب و فقدان آموزش می باشد. لذا این مساله لزوم برنامه ریزی و اهتمام بیشتر مسوولین و دست اندرکاران این دانشگاه را می طلبد.

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Issue Info: 
  • Year: 

    2019
  • Volume: 

    4
  • Issue: 

    4
  • Pages: 

    308-320
Measures: 
  • Citations: 

    0
  • Views: 

    30840
  • Downloads: 

    29527
Abstract: 

In this work, KClO3, K2 Cr2 O7, and KMnO4, dissolved in sulfuric acid, were used to functionalize microporous Polysulfone (PSf) membranes; fabricated by phase inversion Method. The optimum concentrations of oxidizing agent and sulfuric acid and membrane immersion times were determined. FTIR results revealed that the absorbance intensities of-OH and C=O peaks as well as the variety of functional groups in the samples treated by KClO3 are remarkably higher than in the samples treated by K2 Cr2 O7 and KMnO4, respectively. Bovine serum albumin (BSA) filtration experiments revealed that the total Fouling ratio (TFR) and irreversible Fouling ratio (IFR) decreased from 73. 4% for pristine PSf membrane to 52. 9%, 49. 4% and 60. 4% for treated membranes by Set A (K2 Cr2 O7 ), Set B (KClO3 ) and Set C (KMnO4 ), respectively. Moreover, IFR of membranes decreased from 45. 4% for pristine PSf membrane to 29. 9%, 22. 4% and 36. 1% for treated membranes by Set A, Set B, and Set C, respectively.

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Author(s): 

BOLOUKI SPEILY OMID REZA

Issue Info: 
  • Year: 

    2017
  • Volume: 

    5
  • Issue: 

    3
  • Pages: 

    192-199
Measures: 
  • Citations: 

    0
  • Views: 

    85674
  • Downloads: 

    29378
Abstract: 

Nowadays, with the advent of social networks, a big change has occurred in the structure of web-based services. Online community (OC) enable their users to access different type of Information, through the internet based structure anywhere any time. OC services are among the strategies used for production and repost of information by users interested in a specific area. In this respect, users become members in a particular domain at will and begin posting. Considering the networking structure, one of the major challenges these groups face is the lack of reposting behavior. Most users of these systems take up a lurking position toward the posts in the forum. De-lurking is a type of social media behavior where a user breaks an "Online silence" or habit of passive thread viewing to engage in a virtual conversation. One of the proposed ways to improve De-Lurking is the selection and display of influential posts for each individual. Influential posts are so selected as to be more likely reposted by users based on each user's interests, knowledge and characteristics. The present article intends to introduce a new Method for selecting k influential posts to ensure increased repost of information. In terms of participation in OCs, users are divided into two groups of posters and lurkers. Some solutions are proposed to encourage lurking users to participate in reposting the contents. Based on actual data from Twitter and actual blogs with respect to reposts, the assessments indicate the effectiveness of the proposed Method.

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