The use of the distributed file system, AFS, as a solution to the “input/output sandbox” problem in grid computing is studied. A computational grid middleware, primarily to accommodate the environment of the BaBar Computing Model, has been designed, written and is presented. A summary of the existing grid middleware and resources is discussed. A number of benchmarks (one written for this thesis) are used to test the performance of the AFS over the wide area network and grid environment. The performance of the AFS is also tested using a straightforward BaBar Analysis code on real data. Secure web-based and command-line interfaces created to monitor job submission and grid fabric are presented.

Šio magistro darbo „File sharing sistemos: autorių teisių aspektai“ objektas yra autorių teisių reglamentavimo ir apsaugos specifika bei problematika P2P programų pagrindu veikiančiose file sharing sistemose. Darbe analizuojama esama teisinė situacija, akcentuojamos probleminės nagrinėjamos temos sritys, lyginant JAV ir ES (tame tarpe ir Lietuvos) autorių teisės doktrinas, principus, esamas teisės normas bei jų pritaikymą teismų praktikoje. Šį darbą sudaro trys dalys. Pirmoje darbo dalyje, atsižvelgiant į aktualius klausimus bei problematiką autorių teisių srityje, pateikiama file sharing sistemų samprata, glaustai paaiškinant šių sistemų technologinį veikimo principą, aptariant pagrindinius sistemų tipus bei apibrėžiant pagrindines sąvokas. Antroje darbo dalyje išsamiai nagrinėjami P2P programų gamintojų (file sharing paslaugų teikėjų) netiesioginės atsakomybės aspektai autorių teisėje, lyginant JAV ir ES teisines pozicijas, kurias formuoja skirtingos teisės doktrinos, teisės normos bei teisminė praktika. Trečioji darbo dalis apima P2P file sharing programų vartotojų tiesioginės atsakomybės už autorių teisių pažeidimus taikymo aspektus, aptariant, kokios išimtinės autorių teisės yra pažeidžiamos naudojantis P2P file sharing programomis bei analizuojant galimas atsakomybės netaikymo išimtis, analogiškai antrajai darbo daliai – lyginant JAV ir ES teisines pozicijas. Trečioje darbo dalyje taip pat trumpai įvertinama esama probleminė situacija bei apsvarstomos galimos problemos... [toliau žr. visą tekstą] / An object of the following Master’s thesis “File sharing systems: the aspects of copyright” is the particularity and problematic of copyright regulation and protection in the file sharing systems performing on the basis of P2P programs. The work analyses the present legal situation, emphasizes the problem areas analyzed by comparing the USA and EU (including Lithuania’s) copyright doctrines, principles, present legal norms and their application in the practice of courts. This Master`s thesis consists of three parts. According to the actual questions and problematic in the field of copyright, the first work part presents the conception of file sharing systems, by briefly explaining the technological performance principle of such systems, describing the main types of systems and defining the main conceptions. The second work part analyses comprehensively the indirect liability aspects of the manufacturers of P2P programs (file sharing services providers) in the copyright law, when comparing the legal positions of the USA and EU, formed by different law doctrines, legal norms and court practice. The third work part includes the application aspects of direct liability for the copyright infringements made by the end-users of P2P file sharing programs, by discussing what exclusive copyrights are infringed when using the P2P file sharing programs, and analyzing the possible liability exceptions; the analysis is made parallel to the second work part – by comparing the USA and EU... [to full text]

File system benchmarking plays an essential part in assessing the file system’s performance. It is especially difficult to measure and study the file system’s performance as it deals with several layers of hardware and software. Furthermore, different systems have different workload characteristics so while a file system may be optimized based on one given workload it might not perform optimally based on other types of workloads. Thus, it is imperative that the file system under study be examined with a workload equivalent to its production workload to ensure that it is optimized according to its usage. The most widely used benchmarking method is synthetic benchmarking due to its ease of use and flexibility. The flexibility of synthetic benchmarks allows system designers to produce a variety of different workloads that will provide insight on how the file system will perform under slightly different conditions. The downside of synthetic workloads is that they produce generic workloads that do not have the same characteristics as production workloads. For instance, synthetic benchmarks do not take into consideration the effects of the cache that can greatly impact the performance of the underlying file system. In addition, they do not model the variation in a given workload. This can lead to file systems not optimally designed for their usage. This work enhanced synthetic workload generation methods by taking into consideration how the file system operations are satisfied by the lower level function calls. In addition, this work modeled the variations of the workload’s footprint when present. The first step in the methodology was to run a given workload and trace it by a tool called tracefs. The collected traces contained data on the file system operations and the lower level function calls that satisfied these operations. Then the trace was divided into chunks sufficiently small enough to consider the workload characteristics of that chunk to be uniform. Then the configuration file that modeled each chunk was generated and supplied to a synthetic workload generator tool that was created by this work called FileRunner. The workload definition for each chunk allowed FileRunner to generate a synthetic workload that produced the same workload footprint as the corresponding segment in the original workload. In other words, the synthetic workload would exercise the lower level function calls in the same way as the original workload. Furthermore, FileRunner generated a synthetic workload for each specified segment in the order that they appeared in the trace that would result in a in a final workload mimicking the variation present in the original workload. The results indicated that the methodology can create a workload with a throughput within 10% difference and with operation latencies, with the exception of the create latencies, to be within the allowable 10% difference and in some cases within the 15% maximum allowable difference. The work was able to accurately model the I/O footprint. In some cases the difference was negligible and in the worst case it was at 2.49% difference.

The purpose of this study was to test the number of rotations to fracture of the M-Wire GT® Series X(TM) rotary files compared to the original ProFile® GT® rotary files in a simulated curved canal. Eighty GT® Series X(TM) files of 25mm length were divided into eight groups of ten, one for each of the new GT® Series X(TM) files. Eighty original ProFile® GT® files of 25mm length were divided into eight groups of the same tip and taper sizes consistent with the GT® Series X(TM) file groups. Files were rotated at 300 rpm. While the angle may have slightly changed due to the flexure property of the file, the angle was the same for each file with the same tip and taper. The time to fracture was recorded and rotations to fracture were calculated. The data collected was analyzed using a two-way ANOVA, followed by specific post-hoc contrasts comparing the two brands for each tip and taper combination. The results show the M-Wire GT® Series X(TM) files were significantly more resistant to fracture by cyclic fatigue than the ProFile® GT® rotary instruments for the following tip and taper sizes: 20/.04, 30/.04, 30/.06, 30/.08, and 40/.08. The following tip and taper sizes: 20/.06, 40/.04, and 40/.06 were not statistically significant.

The purpose of this study was to examine the number of rotations to failure of two different rotary file systems, EndoSquence Brassler USA (Savannah, GA) and GT(TM) series X(TM). Files sizes 20,30,40 with 0.04, 0.06 tapers of GT series X and Endo Sequence files size and taper used were 20, 30, 40 with 0.04 and 0.06 taper. Like tip and tapers were compared between systems. All files tested were 25mm in length. Files were allocated into 12 groups of 10 files each, and mounted to a universal testing machine. Each file was rotated at 300 rpms until fractured occurred. The number of rotations to fracture were calculated. A two-way ANOVA indicated that each of the 12 groups were significantly different (p < .0001). The Brand Tip/Taper interaction indicated that the differences between the brands varied by Tip/Taper combination (p < .0001). The tip/taper combination 20/.04, the GT series X file rotated 1.4 times longer than the EndoSequence (p = 0.0027). The tip/taper combination 20/.06, the GT series X file rotated 1.61 times longer than the EndoSequence (p = <.0001). The tip/taper combination 30/.04, the GT series X file rotated 3.67 times longer, than the EndoSequence (p = <.0001). For the tip/taper combination 30/.06, the GT series X file rotated 2.63 times longer than the EndoSequence (p = <.0001). For the tip/taper combination 40/.06, the GT series X file rotated 4.05 times longer than the EndoSequence (p = <.0001). In comparing all these tip and taper combinations GT series X was significantly higher rotations to failure. Comparing tip/taper combination 40/.04, the GT series X file rotated 1.22 times longer, however, this was not significantly different than the Sequence (p = 0.0707). The results suggested that the number of rotations to failure for GT series X files were greater than the EndoSequence file of the same tip and taper combination.

The purpose of this study was to compare the resistance to fracture by the twisting of two nickel titanium (NiTi) rotary file systems. The Profile® GT® (GT) and the GT® Series X(TM) (GTX) files were tested to analyze the maximum torsional strength and the maximum angular deflection at the time of separation of the files. For each system, ten new files were tested at each of the following eight taper/size designations for a total of 160 files: 20/0.04, 20/0.06, 30/0.04, 30/0.06, 30/0.08, 40/0.04, 40/0.06, and 40/0.08. The American National Standards Institute / American Dental Association Specification No. 28 was implemented to evaluate torsional limits for these intruments. Files were mounted in a Maillefer Torsiometre machine, which records maximum torsional strength and angular deflection at separation for each file. A two-way ANOVA revealed significant differences after comparing the size and type of file. The GT files required significantly more torque to separate than the GTX files in all groups tested except the GTX file size 20/0.06, which required significantly more maximum torque than the GT file, with no significant difference between the GT and GTX files for size 30/0.04. The GT files exhibited values for angular deflection at separation that were significantly higher than those for the GTX files at sizes 30/0.04 and 40/0.08 and the GTX files exhibited higher values at size 30/0.08 with no significant difference between the brands at the remaining five file sizes. In summary, the GT files required significantly more torque to fracture and exhibited values for angular deflection at separation that were significantly higher than the GTX files for in 6 of 8 and 2 of 8 file sizes, respectively.

zlomekFS is a distributed file system that supports disconnected operation using local cache. During synchronization of local changes it offers easyto-use conflict resolution mechanism. Further improved it became a file system with no specific kernel code. It has therefore a good potential in future public use. As the content of this file system can be updated by many users, keeping history of the changes can be a useful feature. This thesis implements file versioning in zlomekFS, answering the questions such as how to store and access the history. On top of the versioning, the possibility of consistent backup is introduced into the file system. New functionality is derived from the analysis of other file systems with similar features and selection of the most suitable approach for zlomekFS.

zlomekFS is a distributed file system that supports disconnected operation using local cache. During synchronization of local changes it offers easytouse conflict resolution mechanism. Further improved it became a file system with no specific kernel code. It has therefore a good potential in future public use. As the content of this file system can be updated by many users, keeping history of the changes can be a useful feature. This thesis implements file versioning in zlomekFS, answering the questions such as how to store and access the history. On top of the versioning, the possibility of consistent backup is introduced into the file system. New functionality is derived from the analysis of other file systems with similar features and selection of the most suitable approach for zlomekFS.

The goal of this thesis was to design the support for output breakpoints in the Java language and implement the designed solution including integration into the Eclipse IDE. An output breakpoint represents a location in an output media (e.g. file, standard output or socket) where the execution of program should stop. The location in the output media is generalized as a stop condition - it can be in the form of absolute position, a particular line and a character or an occurrence of a text string. The designed solution is based on observing the classes responsible for output using entry method breakpoints that are a standard part of the Java language. This solution is dependent on a particular version and implementation of JRE because some of observed methods are not a part of public Java API.

Este texto toma a materialidade de dois arquivos existentes, quais sejam: o arquivo do Escrileituras (AE), gerado durante a vigência do Projeto de Ensino, Pesquisa e Extensão Escrileituras: um modo de ler-escrever em meio à vida (2011-2014), e o arquivo das Licenciaturas (AL), proveniente da disciplina Educação contemporânea: currículo, didática e planejamento, Turma A, entre os semestres letivos 2016/1 e 2016/2, que está vinculada ao Departamento de Ensino e Currículo (DEC) da Faculdade de Educação (FACED) da Universidade Federal do Rio Grande do Sul (UFRGS). A partir desses dois arquivos, o texto: a) extrai e agencia as suas matérias; b) opera mediante procedimentos de leitura e escritura; c) cria possibilidades tradutórias vivificadoras dos textos que desembocam na criação de um jogo didático tradutório. Os arquivos são movimentados, desse modo, como suportes gerativos de novos textos, já que sua procedência é sempre da ordem da invenção. Tal condição fornece possibilidades de jogar com as matérias que integram os arquivos para fazer aparecer estratégias de um pensamento tradutório. Jogo é entendido como a vicissitude desse pensamento afetado por forças ativas e, em ato, afirma a necessidade de experimentação, capaz de dar outra vida aos próprios arquivos. Por essa razão, o jogo responde à didática como um plano prático que traduz e transforma textos de partida em textos de chegada, positivando a vontade de educar comprometida com a invenção e a revitalização de arquivos. / This text has taken the materiality of two existing files: the Reading-Writing file (RWF), generated along the Project of Teaching, Research and Extension called Reading-Writing: a way of reading-writing in life (2011-2014), and the Teaching Course file (TCF), which stemmed from the discipline of Contemporary Education: curriculum, didactics and planning, Group A, taught during the first and second terms in 2016, which is linked to the Department of Teaching and Curriculum (DTC) of the Education College (FACED) of the Federal University of Rio Grande do Sul (UFRGS). From these files, this text: a) has extracted and connected their matters; b) has acted by means of reading and writing procedures; c) has designed vivifying possibilities of translating the texts that lead to the creation of a didactic translating game. The files have been moved, thus, as supports that generate new texts, since their provenience is always at the invention level. Such condition has provided possibilities of playing with the matters that integrate the files in order to bring up strategies of a translating thought. Game has been understood as a vicissitude of this thought affected by active forces and, in the act, it affirms the need for experimentation, which is able to give a new life to the files themselves. Hence, the game responds to the didactics as a practical plan that translates and transforms source texts into target texts, by affirming the will to educate committed to the invention and revitalization of files.