Search

Тема выпускной квалификационной работы: “Распределенная отказоустойчивая система для сбора Ð´Ð°Ð½Ð½Ñ‹Ñ Ð¸Ð· блокчейн сети.” Данная работа посвящена исследованию Ð´Ð¾ÑÑ‚ÑƒÐ¿Ð½Ñ‹Ñ Ñ€ÐµÑˆÐµÐ½Ð¸Ð¹, Ñ€ÐµÑˆÐ°ÑŽÑ‰Ð¸Ñ Ð·Ð°Ð´Ð°Ñ‡Ñƒ сбора Ð´Ð°Ð½Ð½Ñ‹Ñ Ð¸Ð· блокчейн сети, Ð¸Ñ ÑÑ€Ð°Ð²Ð½ÐµÐ½Ð¸ÑŽ и выделению недостатков, которые мы исправим в процессе разработки собственной системы по сбору Ð´Ð°Ð½Ð½Ñ‹Ñ . Задачи, которые решались в Ñ Ð¾Ð´Ðµ работы: Изучение ÑÑƒÑ‰ÐµÑÑ‚Ð²ÑƒÑŽÑ‰Ð¸Ñ ÑÐ¸ÑÑ‚ÐµÐ¼ и выделение Ð¸Ñ Ð½ÐµÐ´Ð¾ÑÑ‚Ð°Ñ‚ÐºÐ¾Ð². Разработка отказоустойчивой распределенной Ð°Ñ€Ñ Ð¸Ñ‚ÐµÐºÑ‚ÑƒÑ€Ñ‹. Разработка системы на основании построенной Ð°Ñ€Ñ Ð¸Ñ‚ÐµÐºÑ‚ÑƒÑ€Ñ‹. Разворачивание системы. В результате работы была разработана Ð°Ñ€Ñ Ð¸Ñ‚ÐµÐºÑ‚ÑƒÑ€Ð°, использующая акторную модель, которая Ñ Ð¾Ñ€Ð¾ÑˆÐ¾ Ð¿Ð¾Ð´Ñ Ð¾Ð´Ð¸Ñ‚ для нашей задачи. Была разработана распределенная отказустойчивая система на языке программирования Java с использованием библиотеки Akka. Также система была развернута с помощью Docker-контейнеризации и протестирована тестами, которые были построены на Ð²Ñ‹Ð´ÐµÐ»ÐµÐ½Ð½Ñ‹Ñ ÐºÐµÐ¹ÑÐ°Ñ ., The topic of the final qualifying work: “A distributed fault-tolerant system for collecting data from the blockchain network”. This work is devoted to the study of available solutions that solve the problem of collecting data from the blockchain network, comparing them and highlighting the shortcomings that we will correct in the process of developing our own data collection system. Tasks that were solved during the work:Examine some existing systems and highlighting their shortcomings. Development of a fault-tolerant distributed architecture. Development of the system based on the built architecture. Deploying the system As a result of the work, an architecture using a factor model was developed, which is well suited for our task. A distributed fault-tolerant system was developed in the Java programming language using the Akka library. The system was also deployed using Docker containerization and tested with tests that were built on dedicated cases

This paper belongs to a research work that develops a deterministic actor framework in Java named Theatre, which addresses the modeling, analysis, and implementation of time-critical, cyber-physical systems. Theatre distinguishes from other actor systems by being control-based, time-sensitive, and centered on not thread-based actors. Although its main orientation to real-time embedded systems, Theatre can also be exploited for building high-performance applications on nowadays multi-core machines with shared memory. This paper reports an experience of performance comparison of Theatre with the Akka actor toolkit, through a parallel and scalable version of the Iterated Prisoner's Dilemma multi-agent system. Akka is a well-known library implemented in Scala and Java, which efficiently supports classical actors and it is best suited to untimed distributed applications. The experimental work confirms the lightweight nature of Theatre and its concurrent/parallel lock-free computational model, are also a key for achieving high execution performance, even better than that provided by Akka and similar toolkits, when large-scale systems are considered.

Araştırmamızın konusu; Emeviler ve Abbasiler Dönemi’nde Suriye-Filistin’in Doğu Akdeniz kıyılarında inşa ve tesis edilen tersaneler ve deniz harekât üsleridir. Bu konuda Türkiye’de yayımlanmış bir araştırma ve makaleye rastlayamadık. Konuyu daha geniş bir çalışma içerisinde bütün boyutlarıyla araştırdık. Bu makale o araştırmamızın bir bölümünü oluşturmaktadır. Makalemiz Giriş, Akkâ Deniz Üssü ve Tersanesi, Saydâ ve Sûr Deniz Üsleri ve Tersaneleri, Tarsus Deniz Üssü ve Tersanesi, Sonuç ve Kaynakça’dan oluşmaktadır. Emevi ve Abbasi dönemlerinde İslâm coğrafyasının üç bir tarafı denizlerle çevrili olup öteden beri Bizans ve Hind donanmaları bu denizlerde egemendir. Bu yüzden İslâm toprakları denizden vaki düşman donamalarının saldırılarına her zaman açık haldedir. Bu durum Müslüman devlet yöneticilerini İslâm donanması/deniz gücü hazırlamaya sevk etmiştir. Neticede bu kıyılarda fetih öncesi de var olan tersaneler ve havuzlar yeniden onarılmış, bu tersanelerde, daha önce mevcut usta ve sanatkârlardan da yararlanılarak yeni savaş gemileri inşa edilmiştir. Tersanelerin yer aldığı bu limanlar, askeri yapılanma çerçevesinde yeniden donatılarak bahriye/donanma kuvveti ve deniz harekât üsleri kurulmuştur. Araştırmamız literatür taramasına dayanmaktadır, In this article, the subject of “Shipyards and naval operations bases built and installed on the Eastern Mediterranean coasts of Syria-Palestine during the Umayyads and Abbasids” is discussed. The aim of the research is to reveal the importance and importance of the shipyards and naval operations bases built and installed on the East Mediterranean coasts of Syria-Palestine during the Umayyad and Abbasid period. The fact that no research has been done in our country on this subject gives the study a unique quality. Our research is based on the literature review and the subject of the article is examined in all aspects. Our study consists of subtitles of Akkâ Naval Base and Shipyard, Tarsus Naval Base and Shipyard, Saydâ and Sûr Naval Bases and Shipyards. It is known that all three sides of the Islamic world were surrounded by the seas during the Umayyad and Abbasid periods. Byzantine and Hind navies have dominated these seas ever since. Therefore, Islamic lands are open to enemy navy attacks that may come from the sea. This situation has prompted Muslim state administrators to prepare Islamic navy / naval power. In this context, the shipyards and pools that existed on the coasts before conquest were repaired, and new warships were built in these shipyards by making use of the existing masters and craftsmen. These ports, where the shipyards are located, have been re-equipped in the concept of military structuring and naval and naval operations bases have been established.

Проєкт містить 61 с. тексту, 15 рисунків, 21 таблиць, посилання на 20 літературних джерел, додатки та 4 конструкторських документів. Об’єктом розробки є система автоматизації освітнього процесу у школі. Мета розробки – впровадження автоматизації в освітній процес. У дипломному проєкті проведено ретельний аналіз та вибір технологій розробки системи, які надають можливість швидкої та якісної розробки програмного забезпечення. Розроблено систему автоматизації освітнього процесу у школі з використанням фреймворку Akka, мов програмування Scala та JavaScript. Отримані результати можуть бути корисними при створенні аналогічних чи подібних систем. The project contains 61 pages. text, 15 figures, 21 tables, references to 20 literature sources, appendices and 4 design documents. The object of development is a automation system of educational process in school. The purpose of the development - introduction of automation in the educational process. The graduation project has a thorough analysis and a choice of technologies of development system which give the chance of fast and high-quality software development is carried out. A system of automation of the educational process in school has been developed using the Akka framework, Scala and JavaScript programming languages. The obtained results can be useful in creation of analogous or similar systems.

Od studenta se očekuje da opiše model analitike velikih podataka (engl. big data) u obliku višeagentnog sustava te izgradi primjer aplikacije za analitiku. Tehnologija implementacije je proizvoljnja, no preporuka je korstiti platformu Hadoop uz dodatak odgovarajuće višeagentne infrastrukture (npr. SPADE, Akka, Repast i sl.). Diplomski rad treba sadržavati teorijski uvod, opis svih korištenih tehnologija, opis procesa izgradnje višeagentnog sustaca, primjere korištenja, kritički prikaz, zaključak i literaturu.

nonPeerReviewed

Yüzyıllar boyunca Akad, Babil, Fenike, Roma İmparatorluğu, Emeviler, Abbasiler gibi devletlerin hâkimiyeti altına giren Akka, XI. yüzyıla kadar idarî, sosyal ve iktisadî yönden farklılıklar göstermiştir. X. yüzyılın sonundan itibaren Fâtımiler dönemiyle birlikte ilk kez Şiî Müslüman bir devletin hâkimiyeti altına giren şehir, 1074 yılında Selçukluların hâkimiyetine girmiş ve Haçlı Seferleriyle birlikte iki asır boyunca Haçlıların hâkimiyeti altında kalmıştır. Akka, Kudüs’ün Selahaddin Eyyûbi tarafından fethedilmesiyle birlikte Kudüs Krallığı’nın başkenti olmuş ve Memlûk Devleti’nin bölge topraklarını 1291’de fethetmesine kadar bu özelliğini sürdürmüştür. İslam fetihlerinden önce Yahudi ve Hristiyanların, İslam fetihleriyle birlikte Müslümanların bölge topraklarına gelmesi, şehrin etnik ve sosyal yönden değişiklik göstermesine katkıda bulunmuştur. Nitekim İslamiyetin ilk yayılma sahalarından biri, bölge toprakları olduğundan ve üç semavi dinin kutsal şehri Kudüs’e yakın olmasından dolayı Akka, dini bakımdan da önemini sürekli korumuştur. Ekonomik bakımdan ise şehir, Orta Doğu gibi yüzyıllar boyunca stratejik bakımdan önemli bir coğrafyada bulunması ve sahil şeridinde yer alması nedeniyle şehirde deniz yoluyla yapılan ticari faaliyetlerin yapılması mümkün olmuştur. Neticede bu çalışmada XI. ve XII. yüzyıllarda Akka’nın idari bakımdan kimler tarafından yönetildiği, sosyal bakımdan şehrin sahip olduğu özellikler ve yapılan ekonomik faaliyetler anlatılmaya çalışılmıştır., Having been ruled by such civilizations as Phoenicians, Babylonia, the Roman Empire, Umayyad, and Abbasids for centuries, the city of Acre showed differences in terms of administrative, social and economic affairs up until the 11th century. Beginning with its conquest by the Fatimid Empire, this city came under the rule of a state ruled by Shi'ite Muslims towards the end of the 10th century. It was conquered by the Seljuk Empire in 1074 but remained under the Crusade’s power for two centuries following the Crusades. However, upon being conquered by The Ayyubids under Sultan Salahuddin Ayyubi, it earned the status of the capital city of the Jeruselam Kingdom, which continued until it was conquered by the Mamluk Sultanate. Not only invasions of the city by Jews and Christians but also Islamic conquests contributed a great deal to the transformation of the ethnic and social structures of Acre. Being one of the earliest territories where Islam spread, this city maintained its religion-based significance for a very long time considering its closeness to Jeruselam, which is viewed as sacred in all the three monotheistic religions. As to its significance for the economy, Acre is located along the seashore of a strategically important geography like the Middle East, where various marine trades have been carried out through business operations for centuries. The present study has the purpose of discussing who the city of Acre was administered by, from the 11th to 12th, apart from its social characteristics and economic operations conducted there.

System architectures for data-centric applications are commonly comprised of two tiers: An application tier and a data tier. The fact that these tiers do not typically share a common format for data is referred to as object-relational impedance mismatch. To mitigate this, we develop an actor database system that enables the implementation of application logic into the data storage runtime. The actor model also allows for easy distribution of both data and computation across multiple nodes in a cluster. More specifically, we propose the concept of domain actors that provide a type-safe, SQL-like interface to develop the actors of our database system and the concept of Functors to build queries retrieving data contained in multiple actor instances. Our experiments demonstrate the feasibility of encapsulating data into domain actors by evaluating their memory overhead and performance. We also discuss how our proposed actor database system framework solves some of the challenges that arise from the design of distributed databases such as data partitioning, failure handling, and concurrent query processing.

Aufgrund der F��higkeit verschiedene Ressourcen zu teilen, sind P2P Netzwerke seit Jahrzehnten im Fokus der Forschung. Vor allem die Umsetzung von Suchalgorithmen, um verteilte Ressourcen in unstrukturierten P2P Netzwerken zu finden, ist von spezieller Wichtigkeit, da keine zentrale Sicht auf das Netzwerk existiert. Diese Arbeit geht die Notwendigkeit zur Evaluierung und dem Vergleichen von Suchalgorithmen f��r unstrukturierte P2P Netzwerke, unter der Verwendung von Standardmetriken, an. Sie liefert zwei Umsetzungen eines Frameworks f��r systematische Benchmark-Tests von Suchalgorithmen in unstrukturierten P2P Netzwerken und erm��glicht deren Vergleich. Das Framework wird dabei einmal mit dem Actor Model und einmal mit dem auf koordinationsbasiertem Programmiermodel Peer Model umgesetzt. Beide Umsetzungen unterst��tzen dabei die leichte Austauschbarkeit von Suchalgorithmen. Das zweite Ziel dieser Arbeit ist das Erstellen eines voll verteilten Suchalgorithmus f��r unstrukturierte P2P Netzwerke, basierend auf dem kollektiven Futtersuchverhalten von Borkenk��fern. Des Weiteren wird ein bereits bestehender Algorithmus basierend auf dem Physarum Polycephalum Schleimpilz an die Bed��rfnisse von voll verteilter Suche in unstrukturierten P2P Netzwerken angepasst. Um diese Ziele zu erreichen wird folgende methodische Vorgehensweise angewendet. Nach ausf��hrlicher Literaturrecherche werden die Frameworks zun��chst entworfen und anschlie��end umgesetzt. Als n��chstes werden die beiden neuen Suchalgorithmen entwickelt und in die Frameworks eingebunden. Abschlie��end werden beide Algorithmen kompetitiv gemessen, evaluiert und mit vier bekannten Suchalgorithmen verglichen: Gnutella Flooding, k-Walker, AntNet f��r P2P und SMP2P. Bark Beetle und der angepasste Physarum Polycephalum Algorithmus zeigen beide insgesamt sehr gute Ergebnisse hinsichtlich der Skalierbarkeit in Bezug auf Netzwerkgr����e und -last. Hinsichtlich absoluter Zeit zeigen beide Algorithmen sehr vielversprechende Ergebnisse, wobei lediglich k-Walker etwas bessere Ergebnisse bei Netzwerken mit vielen Replikaten erzielt. In puncto Erfolgsrate zeigt Bark Beetle beinahe so gute Ergebnisse wie Gnutella Flooding, ohne dessen wesentliche M��ngel aufzuweisen. Obwohl die Erfolgsrate f��r die Physarum Polycephalum Anpassung sehr niedrig f��r Netzwerke mit wenig Replikaten ist, wird diese signifikant besser f��r Netzwerke mit vielen Replikaten., Through its ability to share various resources, P2P networks have been in the focus of research for the last decades. Especially the utilization of search algorithms to retrieve the distributed resources in unstructured P2P networks is of major importance, since no global view of the network exists. This thesis addresses the need to evaluate and compare search algorithms for unstructured P2P networks with each other by using standard metrics. It provides two frameworks for systematic benchmarking and comparison of search algorithms in unstructured P2P networks. The first framework is implemented based on the Actor Model and the second one based on the Peer Model (a coordination based programming model). Both frameworks support easy exchangeability of search algorithms. The second goal of this thesis is to create a fully distributed search algorithm for unstructured P2P networks based on the collective feeding of bark beetles. Additionally, an already existing algorithm from a different domain based on the Physarum Polycephalum slime mold is adapted to fully distributed search for unstructured P2P networks. To achieve these goals the following methodological approach is applied. After an extensive literature research, the frameworks are first designed and afterwards implemented. As the next step, the two new search algorithms are developed and implemented into the frameworks. As the final step, both algorithms are benchmarked, evaluated and compared to four existing search algorithms: Gnutella Flooding, k-Walker, AntNet for P2P and SMP2P. Overall, Bark Beetle and the adapted Physarum Polycephalum algorithm show very good scalability regarding growing network size and load. In terms of absolute time, both algorithms show very promising results with only k-Walker having slightly better results for networks with high replication. In terms of success rate, Bark Beetle shows an almost equal good success rate as Gnutella Flooding, without having the same major drawbacks. Although the success rate for the Physarum Polycephalum adaption is very low for networks with small replication, it is significantly better for networks with high replication.

The ubiquity of data streams in different fields of computing has led to the emergence of Stream Processing Systems (SPSs) used to program applications that extract insights from unbounded sequences of data items. Streaming applications demand various kinds of optimizations. Most of them are aimed at increasing throughput and reducing processing latency, and need cost models used to analyze the steady-state performance by capturing complex aspects like backpressure and bottleneck detection. In those systems, the tendency is to support dynamic optimizations of running applications which, although with a substantial run-time overhead, are unavoidable in case of unpredictable workloads. As an orthogonal direction, this paper proposes SpinStreams, a static optimization tool able to leverage cost models that programmers can use to detect and understand the inefficiencies of an initial application design. SpinStreams suggests optimizations for restructuring applications by generating code to be run on the SPS. We present the theory behind our optimizations, which cover more general classes of application structures than the ones studied in the literature so far. Then, we assess the accuracy of our models in Akka, an actor-based streaming framework providing a Java and Scala API.

Masteroppgave i informatikk INF399

Haçlı Seferleri; Papa II. Urbanus'un çağrısıyla başlayan, Doğu ve Batı dünyasını iki asır (1095-1272) boyunca Ön Asya'da karşı karşıya getiren bir dizi askerî-siyasî harekâtın hâkimiyet kurma mücadelesidir. Bu girişim I. Haçlı Seferi (1095-1101) ile başlamış, neticesinde Urfa, Antakya, Kudüs ve Trablus'ta Haçlı devletleri kurulmuştur. Bu dört devletle beraber Ürdün ötesi, Filistin sahil şeridi ile Sûriye topraklarının bir kısmı Haçlıların eline geçmiştir. Diğer taraftan kendi aralarında iç çatışmalarla enerjilerini tüketen Müslümanlar ise uzun süre Haçlılara karşı savunma pozisyonunda kalmışlardır. Nihayetinde İmadeddin Zengi'nin Urfa'yı geri almasıyla (1144) başlayan savunmadan karşı saldıraya geçme dönemi, Nureddin Zengi'nin Sûriye'yi birleştirmesiyle yeni bir ivme kazanmıştır. Ardından Selahddin Eyyubi'nin Mısır'da düzeni sağlaması, peşinden Mısır ve Sûriye'yi birleştirmesiyle yükselişe geçen Müslüman gücü karşısında tutunamayan Haçlı ordusu, Hittin Savaşı'nda (1187) yok edilmiştir. Bu zaferden sonra başlayan Müslüman kuvvetlerin tüm yerleşkeleri geri almasıyla sonuçlanan fetih dalgası Kudüs fethi ile sonuçlanmış ve Haçlıların bir asırlık kazanımlarını kaybetmesine yol açmıştır. Fakat Hıristiyan dünyasının bu duruma karşı cevabı gecikmemiş, III. Haçlı Seferi ile karşılık vermişlerdir. Başta olduğu gibi Papa, Avrupa'da kutsal ateşi yeniden alevlendirmiş ve tüm Avrupa'yı harekete geçirmiştir. Ardından Almanya, İngiltere, Fransa, Sicilya, Avusturya; asiller, baronlar ve tüm ulusların şövalyeleri Kudüs'ü geri almak için Filistin'in kral ve prenslerine, Templier ve Hospitalier şövalyelerine katılmışlardır. Neticede Alman İmparatoru ölmüş, krallar geri dönmüş, kavgacı ve tutucu şövalyeler Filistin topraklarına gömülmüştür. Akabinde III. Haçlı Seferi 3 Eylül 11 1192'de Remle Antlaşması'yla sona ermiştir. Anlaşma üç yıl sekiz ay; karada ve denizde sürecek şekilde imzalanmıştır. Anlaşma akdine göre; hacılar kutsal bölgeleri sivil ve silahsız serbestçe ziyaret edebilecek, Müslümanlar ve Hıristiyanlar birbirlerinin ülkelerinde serbestçe seyahat ve ticaret yapabilecek ve Askalan şehri yıkılacaktır. Ancak Selahaddin Eyyubi, başta Kudüs'ün alınması için harcadığı enerjisinin çok daha fazlasını III. Haçlı Seferi ordularına karşı onu korumak için ortaya koymuştur. Tutkuyla bağlı olduğu Kudüs'ü onlara geri vermemiştir. Karşı tarafta ise Batı adına tüm imkânlarıyla savaşan Aslan Yürekli Richard hedefi olan Kudüs'ü geri alamadan ülkesine dönmek zorunda kalmıştır. The Crusades; is the struggle to establish dominance of a series of military-political operations that began with the call of the papal and subjected to the East and West in Asia Minor for two centuries (1095-1272). As a result of this attempt which began with the First Crusade (1095-1101), Crusader states were established in Urfa, Antioch, Jerusalem and Tripoli. Together with these four states, some lands beyond Jordan, the Palestinian coastline and some part of the Syrian land have been captured by the Crusaders. On the other hand, Muslims who consumed their energies with their internal conflicts stayed in a defensive position against the Crusaders for a long time. The period of transition to counter-attack, which eventually began with the retake of Urfa by Imadeddin Zengi (1144), has gained new impetus when Nureddin Zengi united Syria. After that, order provided in Egypt by Saladin Ayyubi, the Crusader army which could not stand against the rising Muslim power by the combination of Egypt and Syria, was destroyed in the Battle of Hittin (1187). The wave of conquest after this victory, which resulted in Muslim forces returning all the settlements after, opened a road to the conquest of Jerusalem and led the Crusaders to lose their a century-old achievements. In response to this situation, the Christian world was not delayed. They responded with the Third Crusade. As in the beginning, the Pope has rekindled the holy fire in Europe and moved all of Europe into action. Then Germany, England, France, Sicily, Austria; noblesses, barons and knights of all nations joined the kings and princes of Palestine, Knights Templar and Knights Hospitaller to take back Jerusalem. As a result, the German emperor died, the kings returned, the aggressive and conservative knights were buried in Palestinian lands. Then, The Third Crusade ended on 3 September 1192 with the Treaty of Remle. The agreement was signed for three years 13 and eight months both on land and at sea. According to the agreement; Muslims and Christians would be able to freely travel and trade in the countries of each other and the city of Askalan would be destroyed. However, Salahaddin Ayyubi, put forth much more than the energy which he had spent for the conquest of Jerusalem, against The Third Crusade armies in order to protect it. He did not give back the city to them, that he was enthusiastically attached to Jerusalem. On the other side, Richard the Lionheart, who fought with all his capabilities on behalf of the West, had to return to his country without getting back Jerusalem, which he aimed for. İngiliz ve Fransızların Bitmeyen Çekişmeleri -- Kutsal-Roma Cermen İmparatorluğu ve Bizans Rekabeti -- Bizans ve Norman Mücadelesi -- Kudüs Fethi'nden Sonra Doğu Ve Batıda Gelişen Olaylar -- Sûr’da Konrad’ın Direnişi -- Papa VIII. Gregorius’un Haçlı Seferi Çağrısı -- Selahaddin Eyyubi’nin İkinci Sûr Kuşatması -- Antakya Çevresindeki ve Mavera-i Ürdün’deki Kalelerin Fethi -- Akkâ Kuşatmasının Başlaması -- Alman İmparatoru Friedrich Barbarossa’nın Haçlı Seferi -- Akkâ Kuşatması Sırasında Doğudaki Haçlıların Durumu -- III. Haçlı Seferi’nde Kadınların Rolü -- İngiltere ve Fransa Krallarının Avrupa’dan Çıkışları -- Aslan Yürekli Richard’ın Kıbrıs’ı İşgali

2017 International Artificial Intelligence and Data Processing Symposium (IDAP) -- SEP 16-17, 2017 -- Malatya, TURKEY, WOS: 000426868700067, This study, it is aimed to perform BER performance analysis in FPGA / FPAA based communication systems known as Embedded systems by using Arduino in Matlab / Simulink environment. Using the Sprott_f chaotic generator, BER performance analysis of the Chaotic On Off Keying (COOK) communication system was obtained., IEEE Turkey Sect, Anatolian Sci