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نویسندگان: 

اطلاعات دوره: 
  • سال: 

    2017
  • دوره: 

    45
  • شماره: 

    -
  • صفحات: 

    132-147
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    65
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

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

بازدید 65

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اطلاعات دوره: 
  • سال: 

    2020
  • دوره: 

    6
  • شماره: 

    2
  • صفحات: 

    61-70
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    116
  • دانلود: 

    0
چکیده: 

Bot networks are a serious threat to cyber security, whose destructive behavior affects network performance directly. Detecting of infected HTTP communications is a big challenge because infected HTTP connections are clearly merged with other types of HTTP traffic. Cybercriminals prefer to use the web as a communication environment to launch application layer attacks and secretly engage in forbidden activities, while TLS (Transport Layer Security) protocols allow encrypted communication between client and server in the context of Internet provides. Methods of analyzing traffic behavior do not depend on payloads. This means that they can work with encrypted network communication protocols. Traffic behavior analysis methods do not depend on package shipments, which means they can work with encrypted network communication protocols. Hence, the analysis of TLS and HTTP traffic behavior has been considered for detecting malicious activities. Because of the exchange of information in the network context is very high and the volume of information is very large, storing and indexing of this massive data require a Big data platform.

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

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نویسندگان: 

AMIRSHAHI BITA | AHANGARI ALI

اطلاعات دوره: 
  • سال: 

    2015
  • دوره: 

    1
  • شماره: 

    3
  • صفحات: 

    39-45
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    247
  • دانلود: 

    0
چکیده: 

Today, botnets have become a serious threat to enterprise networks. By creation of network of bots, they launch several attacks, distributed denial of service attacks (DDoS) on networks is a sample of such attacks. Such attacks with the occupation of system resources, have proven to be an effective method of denying network services. Botnets that launch HTTP packet flood attacks against Web servers are one of the newest and most troublesome threats in networks. In this paper, we present a system called HF-Blocker that detects and prevents the HTTP flood attacks. The proposed system, by checking at the HTTP request in three stages, a Java-based test, check cookies and then check the user agent, detects legitimate source of communication from malicios source, such as botnets. If it is proved the source of connection to be bot, HF-Blocker blocks the request and denies it to access to resources of the web server and thereby prevent a denial of service attack. Performance analysis showed that HF-Blocker, detects and prevents the HTTP-based attacks of botnets with high probability.

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

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

    1399
  • دوره: 

    9
  • شماره: 

    17
  • صفحات: 

    183-197
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    316
  • دانلود: 

    75
چکیده: 

پژوهش حاضر با هدف بررسی نیت کارآفرینانه در بین دانشجویان رشته های کشاورزی دانشگاه بوعلی سینا و دانشگاه پیام نور همدان و در چارچوب کلی پژوهش های پیمایشی به انجام رسیده است. نمونه آماری این تحقیق را تعداد 370 نفر از دانشجویان دختر و پسر رشته های کشاورزی در مقطع تحصیلی کارشناسی دانشکده کشاورزی تشکیل دادند. برای جمع آوری اطلاعات، از ابزار پرسشنامه و برای انتخاب نمونه از روش نمونه گیری تصادفی ساده استفاده شد. ضریب آلفای کرونباخ به منظور تشخیص پایایی پرسشنامه برای نیت کارآفرینی دانشجویان 85/0 محاسبه گردید که ضریب اعتبار مناسبی می باشد. جهت تجزیه و تحلیل اطلاعات، از دو روش آمار توصیفی و تحلیلی استفاده شد. نتایج به دست آمده نشان داد که در مجموع دانشجویان مورد مطالعه از روحیه و نیت کارآفرینی بالایی برخوردارند البته نیت کارآفرینی در دانشجویان پسر بیشتر می باشد. بعلاوه نتایج حاصل از تحلیل همبستگی نیز نشان داد بین متغیرهای جنسیت، وضعیت اشتغال دانشجویان، ریسک پذیری و موانع اقتصادی میزان درآمد و میزان علاقه با نیت کارآفرینی آن ها رابطه مثبت و معنی داری دیده می شود و نیز اختلاف معناداری از نظر نیت کارافرینانه بین دانشگاه های مورد مطالعه وجود داشت.

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نویسنده: 

ANSARI HOSSEIN S.

اطلاعات دوره: 
  • سال: 

    2007
  • دوره: 

    18
تعامل: 
  • بازدید: 

    224
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

Following day was a national holiday <HTTP://en.wikipedia.org/wiki/Vernal_equinox>. The attack came at the peak of the Monday morning rush hour on one of the world's busiest commuter transport systems. The Tokyo subway system transports millions of passengers daily; during rush hour, trains are frequently so crowded that it is nearly impossible to move. The liquid sarin <HTTP://en.wikipedia.org/wiki/Sarin> was contained in plastic bags which each team then wrapped in newspapers. Each perpetrator carried two packets of sarin totalling approximately one litre <HTTP://en.wikipedia.org/wiki/Litre> of sarin, except Yasuo Hayashi, who carried three bags. A single drop of sarin the size of the head of a pin can kill an adult. Carrying their packets of sarin and umbrellas with sharpened tips, the perpetrators boarded their appointed trains; at prearranged stations, each perpetrator dropped his package and punctured it several times with the sharpened tip of his umbrella before escaping to his accomplice's waiting get-away car. Sarin is an extremely potent organophosphate <HTTP://en.wikipedia.org/wiki/Organophosphate> compound that disrupts the nervous system by inhibiting the cholinesterase enzyme by forming a covalent bond <HTTP://en.wikipedia.org/wiki/Covalent_bond> with the particular serine <HTTP://en.wikipedia.org/wiki/Serine> residue in the enzyme which forms the site where acetylcholine normally undergoes hydrolysis <HTTP://en.wikipedia.org/wiki/Hydrolysis>. The short- and long-term symptoms experienced by those affected included: bleeding <HTTP://en.wikipedia.org/wiki/Blood> from the nose and mouth, coma <HTTP://en.wikipedia.org/wiki/Coma>, convulsions <HTTP://en.wikipedia.org/wiki/Convulsion>, difficulty breathing <HTTP://en.wikipedia.org/wiki/Difficulty_breathing>, disturbed sleep 2and nightmares <HTTP://en.wikipedia.org/wiki/Nightmare>, extreme sensitivity to ligh, foaming at the mouth, high fevers <HTTP://en.wikipedia.org/wiki/Fever>, influenza <HTTP://en.wikipedia.org/wiki/Influenza>-like symptoms, loss of consciousness <HTTP://en.wikipedia.org/wiki/Loss_of_consciousness>, loss of memory <HTTP://en.wikipedia.org/wiki/Loss_of_memory>, nausea <HTTP://en.wikipedia.org/wiki/Nausea> and vomiting <HTTP://en.wikipedia.org/wiki/Vomiting>, paralysis <HTTP://en.wikipedia.org/wiki/Paralysis>, post-traumatic stress disorder <HTTP://en.wikipedia.org/wiki/Post-traumatic_stress_disorder>, respiratory problems, seizures <HTTP://en.wikipedia.org/wiki/Seizure>, uncontrollable, trembling <HTTP://en.wikipedia.org/wiki/Trembling>, vision problems both temporary and permanent.

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اطلاعات دوره: 
  • سال: 

    2007
  • دوره: 

    18
تعامل: 
  • بازدید: 

    327
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

Anxiety is an unpleasant emotional state that involves a complex combination of emotions that include fear <HTTP://en.wikipedia.org/wiki/Fear>, apprehension <HTTP://en.wikipedia.org/wiki/Apprehension>, and worry <HTTP://en.wikipedia.org/wiki/Worry>. It is often accompanied by physical sensations such as heart palpitations <HTTP://en.wikipedia.org/wiki/Heart_palpitations>, nausea <HTTP://en.wikipedia.org/wiki/Nausea>, chest pain <HTTP://en.wikipedia.org/wiki/Chest_pain>, shortness of breath <HTTP://en.wikipedia.org/wiki/Shortness_of_breath>, or tension headache <HTTP://en.wikipedia.org/wiki/Tension_headache>. Valerian has uses in herbal <HTTP://en.wikipedia.org/wiki/Herb> medicine as a sedative <HTTP://en.wikipedia.org/wiki/Sedative>. Studies shown efficacy of valerian as a treatment for insomnia. The purpose of this study was to characterize the putative anxiolytic-like effects of valepotriates (dichloromethane extracts of valerian) using the elevated plus maze (EPM) in rats. valepotriates was dissolved in DMSO and orally administered at doses from 0.025 to 1 g/kg to adult male wistar rats , 0.5 , 1.5 and 3 hours before behavioral evaluation in an EPM respectively. Control rats were treated with an equal volume of DMSO. Single treatment of valepotriates (at 0.025, 0.0.05, 0.1, and 0.2 g/kg) significantly increased time-spent and arm entries into open arms of EPM versus control groups (p<0.05). However, no changes in the locomotor activity . This result suggest that valepotriates might proved to be an effective anxiolytic agent.

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

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نویسندگان: 

ALAVIAN SEYED MOAYED

نشریه: 

Hepatitis Monthly

اطلاعات دوره: 
  • سال: 

    2020
  • دوره: 

    20
  • شماره: 

    1
  • صفحات: 

    0-0
تعامل: 
  • استنادات: 

    0
  • بازدید: 

    171
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

Following the publication of the corrigendum in issue 19(11) (HTTP: //hepatmon. com/en/articles/99558. html), the two recently added authors contacted the journal editor and claimed that the roles and order of authors of the published article (link: HTTP: //hepatmon. com/en/articles/15664. html) still needs to be changed. As we already stated in the corrigendum, adding those two new authors was performed due to the official and definite decision made by the Ethics Department of Legal Medicine Organization of Iran and approval of Iran National Committee for Ethics in Biomedical Research (HTTP: //ethics. research.ac.ir/) (published in HTTP: //hepatmon.com/en/articles/99558. html). ...

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اطلاعات دوره: 
  • سال: 

    2007
  • دوره: 

    11
  • شماره: 

    1-2
  • صفحات: 

    37-39
تعامل: 
  • استنادات: 

    1
  • بازدید: 

    677
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

Background and purpose: Changes in medicine and medical education has yield to employment of new teaching methods and a shift to more student centered strategies in education. E-learning is one of these methods that can be used with greater flexibility and has the potential to enhance medical education. For our universities, using e-learning strategies in current curricula and continuous education is an inevitable issue and universities have begun their way in this era.Methods: we reviewed the websites of 9 type 1 Iranian universities of medical sciences including Ahvaz (HTTP://ajums.ac.ir), Iran (HTTP://www.iums.ac.ir), Isfahan (HTTP://www.mui.ac.ir), Kerman (HTTP://www.kmu.ac.ir), Mashad (HTTP://www.mums.ac.ir) Shahid Beheshti (HTTP://www.sbmu.ac.ir), Shiraz (HTTP://www.sums.ac.ir), Tabriz (HTTP://www.tbzmed.ac.ir) and Tehran HTTP://www.tums.ac.ir)universities of medical sciences. We tried to access these sites twice per week for two weeks. Two of the authors performed the search within these sites separately as follows: the homepages’ main menus were reviewed to find links to any kind of e-learning activity. This was done for the homepages of vice-chancellors of education too. Then if the site had a search option, the keywords of “e-learning”, “blended learning” and “electronic learning” were searched both in English and Persian. Then existing e-learning activities were assessed according to formal site utilization, providing interactive content, registration option for students and faculties and tracking option for students’ activities. The results of two authors were compared to reach a consensus.Results: Among these 8 universities, there was just one straight link to distance learning office in Shiraz University of Medical Sciences’ website and a link to online continuous medical education in Tehran University of Medical Sciences’ website. Others had no link for an office or a kind of e-learning activity in their homepages.Conclusion: We concluded from our search of Iranian medical universities that our universities have a long way toward deployment of effective e-learning in medical education and it seems that current efforts are performed individually, not as an organized activity. For establishment of successful e-learning systems, universities should pay more attention to this area, provide facilities and encourage qualitative implementation of e-learning in medical education.

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اطلاعات دوره: 
  • سال: 

    2007
  • دوره: 

    18
تعامل: 
  • بازدید: 

    452
  • دانلود: 

    0
کلیدواژه: 
چکیده: 

Introduction: Syrian Rue with scientific name Peganum harmala L. belong s to Zygophyllaceae family is an annual and flowers are in September. Dry steppes, especially where grazing is heavy and dry waste places. in traditional used that are digestive, diuretic, uterine stimulant, emmenagogue <HTTP://www.pfaf.org/database/search_use.php?K%5b%5d=Emmenagogue> , galactogogue <HTTP://www.pfaf.org/database/search_use.php?K%5b%5d=Galactogogue>, aphrodisiac <HTTP://www.pfaf.org/database/search_use.php?K%5b%5d=Aphrodisiac>, narcotic <HTTP://www.pfaf.org/database/search_use.php?K%5b%5d=Narcotic>, epilepsy, parasiticide <HTTP://www.pfaf.org/database/search_use.php?K%5b%5d=Parasiticide>, cold, fever, rheumatic, mental and nervous illnesses. There for with attention to wild dispersal in rangetands of this North Eastern Golestan.Methods: there for with attention to good adaptation and wild dispersal in many grazing of this province we decided to extraction ethanol and antibacterial effects of this plant by disc diffusion and well methods against infect UTI From golstan prevalence.Results: This study showed that in well methods have good effected for bacteria. Antibacterial effect on Pseudomonas aeruginosa was more than Escherichia coli, Klebciella pneumonia, Acintobacter.

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نویسندگان: 

رضاییان محسن

اطلاعات دوره: 
  • سال: 

    1391
  • دوره: 

    11
  • شماره: 

    2 (پی در پی 43)
  • صفحات: 

    159-172
تعامل: 
  • استنادات: 

    2
  • بازدید: 

    819
  • دانلود: 

    229
چکیده: 

زمینه و هدف: امروزه، ضرورت بازنگری جدی در برنامه های آموزش پزشکی به سمت پاسخگویی در مقابل نیازهای اجتماع، به شکل بسیار گسترده ای در سرتاسر دنیا مورد توجه قرار گرفته است. با توجه به ضرورت طرح این موضوع در آموزش پزشکی کشور، هدف از نگارش این مقاله، تعیین ابعاد دانشکده های پزشکی پاسخگو در مقابل اجتماع می باشد.مواد و روش ها: در مطالعه مروری حاضر، موتورهای جستجوی پاب مد (HTTP://www.ncbi.nlm.nih.gov/pubmed)، گوگل اسکولار (HTTP://scholar.google.com) و های وایر (HTTP://highwire.stanford.edu) با واژگان «school»، «medical»، «accountable»، «socially» مورد جستجو قرار گرفتند. این شیوه جستجو منجر به بازیابی 13 مقاله گردید. همچنین، تلاش شد تا با تغییر در شیوه جستجو و نیز بررسی منابع مورد استفاده در مقالات به دست آمده، مرتبط ترین و به روزترین مقالات علمی مشخص گردند.یافته ها و نتیجه گیری: شواهد نشان می دهند که دانشکده پزشکی پاسخگو در مقابل اجتماع دانشکده ای است که در آن ضرورت بازنگری در محتوای آموزشی، پژوهشی و خدمت رسانی دانشکده های پزشکی با محوریت اولویت های مربوط به نیازهای سلامت جامعه تحت پوشش و بر اساس اصول و موازین اخلاقی مورد توجه قرار گرفته است. به علاوه، شیوه گزینش استاد و دانشجو و همچنین ارزشیابی دانشکده ها به نحوی صورت می پذیرد تا آرمان پاسخگویی در مقابل اجتماع در مرکز توجه قرار گیرد.بحث: پاسخگویی در مقابل نیازهای اجتماع از اولویت های اساسی در بازنگری آموزش پزشکی در اطراف و اکناف جهان است. ضروری است تا این آرمان توسط سایر دانشکده های علوم سلامت نیز مورد تایید و استفاده قرار گیرد.

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