Ratko Rudič Mikrojedrni Operacijski Sistemi
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
The Politics of Roman Memory in the Age of Justinian DISSERTATION Presented in Partial Fulfillment of the Requirements for the D
The Politics of Roman Memory in the Age of Justinian DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Marion Woodrow Kruse, III Graduate Program in Greek and Latin The Ohio State University 2015 Dissertation Committee: Anthony Kaldellis, Advisor; Benjamin Acosta-Hughes; Nathan Rosenstein Copyright by Marion Woodrow Kruse, III 2015 ABSTRACT This dissertation explores the use of Roman historical memory from the late fifth century through the middle of the sixth century AD. The collapse of Roman government in the western Roman empire in the late fifth century inspired a crisis of identity and political messaging in the eastern Roman empire of the same period. I argue that the Romans of the eastern empire, in particular those who lived in Constantinople and worked in or around the imperial administration, responded to the challenge posed by the loss of Rome by rewriting the history of the Roman empire. The new historical narratives that arose during this period were initially concerned with Roman identity and fixated on urban space (in particular the cities of Rome and Constantinople) and Roman mythistory. By the sixth century, however, the debate over Roman history had begun to infuse all levels of Roman political discourse and became a major component of the emperor Justinian’s imperial messaging and propaganda, especially in his Novels. The imperial history proposed by the Novels was aggressivley challenged by other writers of the period, creating a clear historical and political conflict over the role and import of Roman history as a model or justification for Roman politics in the sixth century. -
The Flask Security Architecture: System Support for Diverse Security Policies
The Flask Security Architecture: System Support for Diverse Security Policies Ray Spencer Secure Computing Corporation Stephen Smalley, Peter Loscocco National Security Agency Mike Hibler, David Andersen, Jay Lepreau University of Utah http://www.cs.utah.edu/flux/flask/ Abstract and even many types of policies [1, 43, 48]. To be gen- erally acceptable, any computer security solution must Operating systems must be flexible in their support be flexible enough to support this wide range of security for security policies, providing sufficient mechanisms for policies. Even in the distributed environments of today, supporting the wide variety of real-world security poli- this policy flexibility must be supported by the security cies. Such flexibility requires controlling the propaga- mechanisms of the operating system [32]. tion of access rights, enforcing fine-grained access rights and supporting the revocation of previously granted ac- Supporting policy flexibility in the operating system is cess rights. Previous systems are lacking in at least one a hard problem that goes beyond just supporting multi- of these areas. In this paper we present an operating ple policies. The system must be capable of supporting system security architecture that solves these problems. fine-grained access controls on low-level objects used to Control over propagation is provided by ensuring that perform higher-level functions controlled by the secu- the security policy is consulted for every security deci- rity policy. Additionally, the system must ensure that sion. This control is achieved without significant perfor- the propagation of access rights is in accordance with mance degradation through the use of a security decision the security policy. -
Microkernels Meet Recursive Virtual Machines
Microkernels Meet Recursive Virtual Machines Bryan Ford Mike Hibler Jay Lepreau Patrick Tullmann Godmar Back Stephen Clawson Department of Computer Science, University of Utah Salt Lake City, UT 84112 [email protected] http://www.cs.utah.edu/projects/flux/ Abstract ªverticallyº by implementing OS functionalityin stackable virtual machine monitors, each of which exports a virtual Thispaper describes a novel approach to providingmod- machine interface compatible with the machine interface ular and extensible operating system functionality and en- on which it runs. Traditionally,virtual machines have been capsulated environments based on a synthesis of micro- implemented on and export existing hardware architectures kernel and virtual machine concepts. We have developed so they can support ªnaiveº operating systems (see Fig- a software-based virtualizable architecture called Fluke ure 1). For example, the most well-known virtual machine that allows recursive virtual machines (virtual machines system, VM/370 [28, 29], provides virtual memory and se- running on other virtual machines) to be implemented ef- curity between multiple concurrent virtual machines, all ®ciently by a microkernel running on generic hardware. exporting the IBM S/370 hardware architecture. Further- A complete virtual machine interface is provided at each more, special virtualizable hardware architectures [22, 35] level; ef®ciency derives from needing to implement only have been proposed, whose design goal is to allow virtual new functionality at each level. This infrastructure allows machines to be stacked much more ef®ciently. common OS functionality, such as process management, demand paging, fault tolerance, and debugging support, to This paper presents a new approach to OS extensibil- be provided by cleanly modularized, independent, stack- ity which combines both microkernel and virtual machine able virtual machine monitors, implemented as user pro- concepts in one system. -
All Computer Applications Need to Store and Retrieve Information
MyFS: An Enhanced File System for MINIX A Dissertation Submitted in partial fulfillment of the requirement for the award of the degree of MASTER OF ENGINEERING ( COMPUTER TECHNOLOGY & APPLICATIONS ) By ASHISH BHAWSAR College Roll No. 05/CTA/03 Delhi University Roll No. 3005 Under the guidance of Prof. Asok De Department Of Computer Engineering Delhi College Of Engineering, New Delhi-110042 (University of Delhi) July-2005 1 CERTIFICATE This is to certify that the dissertation entitled “MyFS: An Enhanced File System for MINIX” submitted by Ashish Bhawsar in the partial fulfillment of the requirement for the award of degree of Master of Engineering in Computer Technology and Application, Delhi College of Engineering is an account of his work carried out under my guidance and supervision. Professor D. Roy Choudhury Professor Asok De Head of Department Head of Department Department of Computer Engineering Department of Information Technology Delhi College of Engineering Delhi College of Engineering Delhi Delhi 2 ACKNOWLEDGEMENT It is a great pleasure to have the opportunity to extent my heartiest felt gratitude to everybody who helped me throughout the course of this project. I would like to express my heartiest felt regards to Dr. Asok De, Head of the Department, Department of Information Technology for the constant motivation and support during the duration of this project. It is my privilege and owner to have worked under the supervision. His invaluable guidance and helpful discussions in every stage of this thesis really helped me in materializing this project. It is indeed difficult to put his contribution in few words. I would also like to take this opportunity to present my most sincere regards to Dr. -
Perceptions of the Ancient Jews As a Nation in the Greek and Roman Worlds
Perceptions of the Ancient Jews as a Nation in the Greek and Roman Worlds By Keaton Arksey A Thesis submitted to the Faculty of Graduate Studies of The University of Manitoba In partial fulfilment of the requirements of the degree of MASTER OF ARTS Department of Classics University of Manitoba Winnipeg Copyright © 2016 by Keaton Arksey Abstract The question of what made one Jewish in the ancient world remains a fraught topic for scholars. The current communis opinio is that Jewish communities had more in common with the Greeks and Romans than previously thought. Throughout the Diaspora, Jewish communities struggled with how to live amongst their Greco-Roman majority while continuing to practise their faith and thereby remain identifiably ‘Jewish’. To describe a unified Jewish identity in the Mediterranean in the period between 200 BCE and 200 CE is incorrect, since each Jewish community approached its identity in unique ways. These varied on the basis of time, place, and how the non-Jewish population reacted to the Jews and interpreted Judaism. This thesis examines the three major centres of Jewish life in the ancient world - Rome, Alexandria in Egypt, and Judaea - demonstrate that Jewish identity was remarkably and surprisingly fluid. By examining the available Jewish, Roman, and Greek literary and archaeological sources, one can learn how Jewish identity evolved in the Greco-Roman world. The Jews interacted with non-Jews daily, and adapted their neighbours’ practices while retaining what they considered a distinctive Jewish identity. Each chapter of this thesis examines a Jewish community in a different region of the ancient Mediterranean. -
Composing Abstractions Using the Null-Kernel
Composing Abstractions using the null-Kernel James Litton Deepak Garg University of Maryland Max Planck Institute for Software Systems Max Planck Institute for Software Systems [email protected] [email protected] Peter Druschel Bobby Bhattacharjee Max Planck Institute for Software Systems University of Maryland [email protected] [email protected] CCS CONCEPTS hardware, such as GPUs, crypto/AI accelerators, smart NICs/- • Software and its engineering → Operating systems; storage devices, NVRAM etc., and to efficiently support new Layered systems; • Security and privacy → Access control. application requirements for functionality such as transac- tional memory, fast snapshots, fine-grained isolation, etc., KEYWORDS that demand new OS abstractions that can exploit existing hardware in novel and more efficient ways. Operating Systems, Capability Systems At its core, the null-Kernel derives its novelty from being ACM Reference Format: able to support and compose across components, called Ab- James Litton, Deepak Garg, Peter Druschel, and Bobby Bhattachar- stract Machines (AMs) that provide programming interfaces jee. 2019. Composing Abstractions using the null-Kernel. In Work- at different levels of abstraction. The null-Kernel uses an ex- shop on Hot Topics in Operating Systems (HotOS ’19), May 13–15, 2019, Bertinoro, Italy. ACM, New York, NY, USA, 6 pages. https: tensible capability mechanism to control resource allocation //doi.org/10.1145/3317550.3321450 and use at runtime. The ability of the null-Kernel to support interfaces at different levels of abstraction accrues several 1 INTRODUCTION benefits: New hardware can be rapidly deployed using rela- tively low-level interfaces; high-level interfaces can easily Abstractions imply choice, one that OS designers must con- be built using low-level ones; and applications can benefit front when designing a programming interface to expose. -
Cisco Telepresence Server 4.4(1.16) MR1 Open Source Documentation
Open Source Used In Cisco TelePresence Server 4.4(1.16) MR1 Cisco Systems, Inc. www.cisco.com Cisco has more than 200 offices worldwide. Addresses, phone numbers, and fax numbers are listed on the Cisco website at www.cisco.com/go/offices. Text Part Number: 78EE117C99-139358573 Open Source Used In Cisco TelePresence Server 4.4(1.16) MR1 1 This document contains licenses and notices for open source software used in this product. With respect to the free/open source software listed in this document, if you have any questions or wish to receive a copy of any source code to which you may be entitled under the applicable free/open source license(s) (such as the GNU Lesser/General Public License), please contact us at [email protected]. In your requests please include the following reference number 78EE117C99-139358573 Contents 1.1 Brian Gladman's AES Implementation 11-01-11 1.1.1 Available under license 1.2 busybox 1.15.1 :15.el6 1.2.1 Available under license 1.3 Coreboot d9b5d897d7f05d0ee8f9411628b757beea990b4b 1.3.1 Available under license 1.4 curl and libcurl 7.44.0 :7.44.0 1.4.1 Available under license 1.5 dhcp 4.1.1-P1 1.5.1 Available under license 1.6 expat 2.2.0 1.6.1 Available under license 1.7 FatFS R0.05 1.7.1 Available under license 1.8 freetype 2.5.3 1.8.1 Available under license 1.9 fribidi 0.19.6 :1 1.9.1 Available under license 1.10 G.722 2.00 1.10.1 Available under license 1.11 HMAC n/a 1.11.1 Available under license 1.12 icelib f50dffe9820bb7e32ac7b9b1b1d19aa3431227a2 1.12.1 Available under license 1.13 -
Water Quality Monitoring System Operating Manual February 2002
Water Quality Monitoring System Operating Manual February 2002 (Revision A) Hydrolab Corporation 8700 Cameron Road, Suite 100 Austin, Texas 78754 USA (800)949-3766 or (512)832-8832 fax: (512)832-8839 www.hydrolab.com Quanta•G Display Operations Tree Calib Salin SpC TDS DO DO% ORP pH BP Depth 00:002 mg/L 100% YMDHM [Standard, Scale Factor, or BP] Calib Review Screen Store [Index#] Screen 1⇔2⇔32 [Index#] Clear ClearAll Screen Screen Review Screen Setup Circ Temp Salin/TDS Depth On Off °C °F PSS g/L m ft Setup Notes: 1. Pressing the Esc ∞ key always exits to the previous operation level except at the top level where it toggles the circulator on or off. 2. RTC calibration (Calib ! 00:00) and Screen 3 are only available if the RTC/PC-Dump option is installed. 3. If the RTC/PC-Dump option is installed, pressing and holding the Esc ∞ key down during power-up causes the Quanta Display to enter PC-Dump mode. Table of Contents 1 Introduction ...........................................................................................................................1 1.1 Foreword.........................................................................................................................1 1.2 Specifications..................................................................................................................1 1.3 Components ....................................................................................................................2 1.4 Assembly.........................................................................................................................3 -
The Flask Security Architecture: System Support for Diverse Security Policies
The Flask Security Architecture: System Support for Diverse Security Policies Ray Spencer Secure Computing Corporation Stephen Smalley, Peter Loscocco National Security Agency Mike Hibler, David Andersen, Jay Lepreau University of Utah http://www.cs.utah.edu/flux/flask/ Abstract and even many types of policies [1, 43, 48]. To be gen erally acceptable, any computer security solution must Operating systems must be flexible in their support be flexible enough to support this wide range of security for security policies, providing sufficient mechanisms for policies. Even in the distributed environments of today, supporting the wide variety of real-world security poli this policy flexibility must be supported by the security cies. Such flexibility requires controlling the propaga mechanisms of the operating system [32]. tion of access rights, enforcing fine-grained access rights and supporting the revocation of previously granted ac Supporting policy flexibility in the operating system is cess rights. Previous systems are lacking in at least one a hard problem that goes beyond just supporting multi of these areas. In this paper we present an operating ple policies. The system must be capable of supporting system security architecture that solves these problems. fine-grained access controls on low-level objects used to Control over propagation is provided by ensuring that perform higher-level functions controlled by the secu the security policy is consulted for every security deci rity policy. Additionally, the system must ensure that sion. This control is achieved without significant perfor the propagation of access rights is in accordance with mance degradation through the use of a security decision the security policy. -
Harvard Cs252r Fa'13
Type Enforcement & Pluggable MAC Harvard CS252r Fa’13 Tuesday, October 22, 13 1 Practical Domain and Type Enforcement for UNIX • Badger, et al. 1995 • Trusted Information Systems Tuesday, October 22, 13 2 Domain and Type Enforcement • Every Subject is associated with a Domain • Every Object is associated with a Type Tuesday, October 22, 13 3 Boebart and Kain ’85 [7], page 23 introduces this a given user could have multiple subjects operating in diferent domains dynamically, it seems a subject and an object are associated with just one, statically: could be anything Domain and Type Enforcement • Domain Definition Table • Domain’s Access Rights to each Type • read, write, etc. • Domain Interaction Table • Domain’s Access Rights to other Domains • signal, create, destroy, etc. Tuesday, October 22, 13 4 Domain and Type Enforcement • Strict Superset of Lattice-Expressible Security Policies Tuesday, October 22, 13 5 Domain and Type Enforcement Manager budget designs Accountant Engineer salary Tuesday, October 22, 13 6 DTEL Domain and Type Enforcement Language • Encompasses Existing Security Policies • Hierarchical Types • Simple, Declarative Language Tuesday, October 22, 13 7 DTEL Operating System Entities File Hierarchy Process Hierarchy Figure 1: Mismatch Between Policy Concepts and System Structures trol configurations. A DTE specification includes ration: the type statement, the domain statement, the security attribute associations such as typelfile tnitial-domain statement, and the assign statement.’ associations as well as other access control in- The purpose of this section is not to fully document Tuesday,formation. October 22, 13 The language provides a high-level DTEL, but to demonstrate through a small example 8 view of information traditionally enurnerated in that a meaningful DTEL policy can be expressed com- type enforcement tables and includes facilities pletely in a form simple and concise enough to be ad- for superimposing security attribute bindings and ministered at reasonable cost. -
Capability Myths Demolished
Capability Myths Demolished Mark S. Miller Ka-Ping Yee Jonathan Shapiro Combex, Inc. University of California, Berkeley Johns Hopkins University [email protected] [email protected] [email protected] ABSTRACT The second and third myths state false limitations on We address three common misconceptions about what capability systems can do, and have been capability-based systems: the Equivalence Myth (access propagated by a series of research publications over the control list systems and capability systems are formally past 20 years (including [2, 3, 7, 24]). They have been equivalent), the Confinement Myth (capability systems cited as reasons to avoid adopting capability models cannot enforce confinement), and the Irrevocability and have even motivated some researchers to augment Myth (capability-based access cannot be revoked). The capability systems with extra access checks [7, 13] in Equivalence Myth obscures the benefits of capabilities attempts to fix problems that do not exist. The myths as compared to access control lists, while the Confine- about what capability systems cannot do continue to ment Myth and the Irrevocability Myth lead people to spread, despite formal results [22] and practical see problems with capabilities that do not actually exist. systems [1, 9, 18, 21] demonstrating that they can do these supposedly impossible things. The prevalence of these myths is due to differing inter- pretations of the capability security model. To clear up We believe these severe misunderstandings are rooted the confusion, we examine three different models that in the fact that the term capability has come to be have been used to describe capabilities, and define a set portrayed in terms of several very different security of seven security properties that capture the distinctions models. -
Arheologija I Prirodne Nauke
ARHEOLOGIJA I PRIRODNE NAUKE ARCHAEOLOGY AND SCIENCE Center for New Technology Institute of Archaeology Belgrade ARCHAEOLOGY AND SCIENCE 10 2014 Belgrade 2015 Centar za nove tehnologije Arheološki institut Beograd ARHEOLOGIJA I PRIRODNE NAUKE 10 2014 Beograd 2015. Published: Center for New Technology Viminacium Institute of Archaeology Belgrade Kneza Mihaila 35/IV 11000 Belgrade, Serbia e-mail: [email protected] Tel. +381 11 2637191 For the publishers: Miomir Korać Vladimir Miletić Editor-in-chief: Miomir Korać Editorial Board: Roksana Chowaniec, University of Warsaw, Institute of Archaeology, Warsaw Gianfranco Cicognani, Central European Initiative (CEI-ES), Trieste Rosemarie Cordie, Archäologiepark Belginum Eric De Sena, John Cabot University, Rome Snežana Golubović, Institute of Archaeology, Belgrade Natalia Goncharova, Lomonosov Moscow State University, Moscow Gisela Grupe, Ludwig-Maximilians-Universität, München Michaela Harbeck, Staatssammlung für Anthropologie und Paläoanatomie, München Lanfranco Masotti, Universita’ di Bologna, Bologna Žarko Mijailović, University of Belgrade, Faculty of Mathematics, Belgrade Živko Mikić, University of Belgrade, Faculty of Philosophy, Belgrade Milan Milosavljević, University of Belgrade, Faculty of Electrical Engineering, Belgrade Dragan Milovanović, University of Belgrade, Faculty of Mining and Geology, Belgrade Zoran Obradović, Temple University, Philadelphia Zoran Ognjanović, Mathematical Institute, Belgrade Marco Pacetti, Universita’ Politecnico delle Marche, Ancona Slaviša Perić, Institute