نتایج جستجو برای: شبیهسازی عددی مستقیم dns

تعداد نتایج: 62200  

Journal: :CoRR 2016
Zheng Wang

The Domain Name System (DNS) is a fundamental Internet infrastructure, which resolves billions of queries per day in support of global communications and commerce. The most common use of DNS is to map human-friendly domain names to machine-readable IP addresses.The DNS is designed based on the client-server model where stub resolver at the client side originates DNS query for some query name an...

ژورنال: :مهندسی مکانیک مدرس 2015
وحید اصفهانیان علی اکبر دهقان مسیح خوشاب حسین چیذری

در جریان آرام کنترل رخداد گذرش بسیار پراهمیت است زیرا تعیین صحیح نیروهای آیرودینامیکی و میزان انتقال حرارت بشدت تحت تاثیر تشخیص درست و کنترل این رخداد است. گذرش به طور شدیدی تابع زمان و مکان است و به طور سریع مقیاس های مختلف میکروسکپی و ماکروسکپی به یکدیگر تبدیل می شوند. عدم قطعیت مدل های آشفتگی در تعیین مکان رخداد گذرش جریان موجب طراحی نادرست یا دست کم افزایش هزینه طراحی و ساخت خواهد شد. با تو...

Journal: :IEEE Trans. Parallel Distrib. Syst. 2003
Lan Wang Xiaoliang Zhao Dan Pei Randy Bush Daniel Massey Allison Mankin Shyhtsun Felix Wu Lixia Zhang

The Domain Name System (DNS) is an essential part of the Internet infrastructure and provides fundamental services, such as translating host names into IP addresses for Internet communication. The DNS is vulnerable to a number of potential faults and attacks. In particular, false routing announcements can deny access to the DNS service or redirect DNS queries to a malicious impostor. Due to the...

2002
Zhuoqing Morley Mao Charles D. Cranor Fred Douglis Michael Rabinovich Oliver Spatscheck Jia Wang

Content Distribution Networks (CDNs) attempt to improve Web performance by delivering Web content to end-users from servers located at the edge of the network. An important factor contributing to the performance improvement is the ability of a CDN to select servers in the proximity of the requesting clients. Most CDNs today use the Domain Name System (DNS) to make such server selection decision...

2012
Simar Preet Singh A Raman Maini

The Domain Name System (DNS) is a hierarchical naming system that is built on a distributed database for computers, services, or any other resource connected to the Internet or a private network. It translates the domain names meaningful to humans into the numerical identifiers associated with the networking equipment for the purpose of locating and addressing these devices worldwide [1]. The j...

2006
Hidetoshi Ooigawa Naoki Otani Atsushi Osumi Katsuji Shima

We studied the fate of Nissl-stained dark neurons (N-DNs) following traumatic brain injury (TBI). N-DNs were investigated in the cerebral neocortex and the hippocampus using a rat lateral Xuid percussion injury model. Nissl stain, acid fuchsin stain and immunohistochemistry with phosphorylated extracellular signal-regulated protein kinase (pERK) antibody were used in order to assess posttraumat...

In this research, hydrodynamics of the Bubble Train Flows (BTF) in circular capillaries has been investigated by Direct Numerical Simulation (DNS).The Volume of Fluid Based (VOF) interface tracking method and streamwise direction periodic boundary conditions has been applied. The results show that there exists an appropriate agreement between DNS and experimental correlation results. The re...

2004
Duane Wessels Marina Fomenkov Nevil Brownlee Kimberly C. Claffy

Given that the global DNS system, especially at the higher root and top-levels, experiences significant query loads, we seek to answer the following questions: (1) How does the choice of DNS caching software for local resolvers affect query load at the higher levels? (2) How do DNS caching implementations spread the query load among a set of higher level DNS servers? To answer these questions w...

2009
David Dagon Manos Antonakakis Kevin Day Xiapu Luo Christopher P. Lee Wenke Lee

DNS implementers face numerous choices in architecting DNS resolvers, each with profound implications for security. Absent the use of DNSSEC, there are numerous interim techniques to improve DNS forgery resistance. We explore how different resolver architectures can affect the risk of DNS poisoning. The contributions of this work include: (A) We create a comprehensive, accurate model of DNS poi...

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function paginate(evt) { url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term pg=parseInt(evt.target.text) var data={ "year":filter_year, "term":term, "pgn":pg } filtered_res=post_and_fetch(data,url) window.scrollTo(0,0); } function update_search_meta(search_meta) { meta_place=document.getElementById("search_meta_data") term=search_meta.term active_pgn=search_meta.pgn num_res=search_meta.num_res num_pages=search_meta.num_pages year=search_meta.year meta_place.dataset.term=term meta_place.dataset.page=active_pgn meta_place.dataset.num_res=num_res meta_place.dataset.num_pages=num_pages meta_place.dataset.year=year document.getElementById("num_result_place").innerHTML=num_res if (year !== "unfilter"){ document.getElementById("year_filter_label").style="display:inline;" document.getElementById("year_filter_place").innerHTML=year }else { document.getElementById("year_filter_label").style="display:none;" document.getElementById("year_filter_place").innerHTML="" } } function update_pagination() { search_meta_place=document.getElementById('search_meta_data') num_pages=search_meta_place.dataset.num_pages; active_pgn=parseInt(search_meta_place.dataset.page); document.getElementById("pgn-ul").innerHTML=""; pgn_html=""; for (i = 1; i <= num_pages; i++){ if (i===active_pgn){ actv="active" }else {actv=""} pgn_li="
  • " +i+ "
  • "; pgn_html+=pgn_li; } document.getElementById("pgn-ul").innerHTML=pgn_html var pgn_links = document.querySelectorAll('.mypgn'); pgn_links.forEach(function(pgn_link) { pgn_link.addEventListener('click', paginate) }) } function post_and_fetch(data,url) { showLoading() xhr = new XMLHttpRequest(); xhr.open('POST', url, true); xhr.setRequestHeader('Content-Type', 'application/json; charset=UTF-8'); xhr.onreadystatechange = function() { if (xhr.readyState === 4 && xhr.status === 200) { var resp = xhr.responseText; resp_json=JSON.parse(resp) resp_place = document.getElementById("search_result_div") resp_place.innerHTML = resp_json['results'] search_meta = resp_json['meta'] update_search_meta(search_meta) update_pagination() hideLoading() } }; xhr.send(JSON.stringify(data)); } function unfilter() { url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":"unfilter", "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } function deactivate_all_bars(){ var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(bar) { bar.dataset.active = false bar.style = "stroke:#71a3c5;" }) } year_chart.on("created", function() { var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(check) { check.addEventListener('click', checkIndex); }) }); function checkIndex(event) { var yrchart = document.querySelectorAll('.ct-bar'); var year_bar = event.target if (year_bar.dataset.active == "true") { unfilter_res = unfilter() year_bar.dataset.active = false year_bar.style = "stroke:#1d2b3699;" } else { deactivate_all_bars() year_bar.dataset.active = true year_bar.style = "stroke:#e56f6f;" filter_year = chart_data['labels'][Array.from(yrchart).indexOf(year_bar)] url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":filter_year, "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } } function showLoading() { document.getElementById("loading").style.display = "block"; setTimeout(hideLoading, 10000); // 10 seconds } function hideLoading() { document.getElementById("loading").style.display = "none"; } -->