94 research outputs found
Heimdal and Windows 2000 Kerberos - how to get them to play together
No full textAs a practical means of achieving better security and single sign-on, the Kerberos network authentication system has been in wide use in the Unix world for many years.
Microsoft has included its own implementation in Windows 2000, replacing the NTLM authentication system from older Windows NT versions. This facilitates sharing account information between Unix and Windows machines, as there is no need to keep different passwords.
Although Microsoft's Kerberos implementation mostly follows the specification, there are a number of deviations and extensions, not all of which are well documented. Consequently, it is not always obvious how to fit Windows 2000 clients and servers into an existing Kerberos environment. In this paper we discuss the differences between the two systems and describe how we got our Kerberos implementation, Heimdal, to work with Windows 2000
A Freely Available Scalable MTA
No full textRights to individual papers remain with the author or the author's employer. Permission is granted for noncommercial reproduction of the work for educational or research purposes. This copyright notice must be included in the reproduced paper. USENIX acknowledges all trademarks herein. For more information about the USENIX Association
Heimdal and Windows 2000 Kerberos - how to get them to play together
No full textAs a practical means of achieving better security and single sign-on, the Kerberos network authentication system has been in wide use in the Unix world for many years. Microsoft has included its own implementation in Windows 2000, replacing the NTLM authentication system from older Windows NT versions. This facilitates sharing account information between Unix and Windows machines, as there is no need to keep different passwords. Although Microsoft's Kerberos implementation mostly follows the specification, there are a number of deviations and extensions, not all of which are well documented. Consequently, it is not always obvious how to fit Windows 2000 clients and servers into an existing Kerberos environment. In this paper we discuss the differences between the two systems and describe how we got our Kerberos implementation, Heimdal, to work with Windows 2000.</p
Different database methods in Heimdal
No full textThis paper describes some of the common ways of implementing the Kerberos database and distributing this among the Kerberos servers. The methods available in the Heimdal implementations are examined and some performance measurements are presented.
Model Predictive Control of a Combined EGR/SCR HD Diesel Engine
No full textMaterials Noise, Vibration and Harshness Parts and Components Power and Propulsion Quality, Reliability and Durability Safety Tests and Testing Transportation Systems Vehicles and Performance Other Options Papers by Event SAE Home > Papers> By Event> SAE 2010 World Congress & Exhibition Model Predictive Control of a Combined EGR/SCR HD Diesel Engine Date Published: 2010-04-12Paper Number: 2010-01-1175 DOI: 10.4271/2010-01-1175 Author(s): Claes Westerlund - Scania CV AB Bjorn Westerberg - Scania CV AB Ingemar Odenbrand - Lund Univ. Rolf Egnell - Lund Univ. View All CollapseAbstract Achieving upcoming HD emissions legislation, Euro VI / EPA 10, is a challenge for all engine manufacturers. A likely solution to meet the NO x limit is to use a combination of EGR and SCR. Combining these two technologies poses new challenges and possibilities when it comes to optimization and calibration
Model Predictive Control of a Combined EGR/SCR HD Diesel Engine
No full textMaterials Noise, Vibration and Harshness Parts and Components Power and Propulsion Quality, Reliability and Durability Safety Tests and Testing Transportation Systems Vehicles and Performance Other Options Papers by Event SAE Home > Papers> By Event> SAE 2010 World Congress & Exhibition Model Predictive Control of a Combined EGR/SCR HD Diesel Engine Date Published: 2010-04-12Paper Number: 2010-01-1175 DOI: 10.4271/2010-01-1175 Author(s): Claes Westerlund - Scania CV AB Bjorn Westerberg - Scania CV AB Ingemar Odenbrand - Lund Univ. Rolf Egnell - Lund Univ. View All CollapseAbstract Achieving upcoming HD emissions legislation, Euro VI / EPA 10, is a challenge for all engine manufacturers. A likely solution to meet the NO x limit is to use a combination of EGR and SCR. Combining these two technologies poses new challenges and possibilities when it comes to optimization and calibration
The design of a multicast-based distributed file system
No full textJetFile is a distributed file system designed to support shared file access in a heterogenous environment such as the Internet. It uses multicast communication and optimistic strategies for synchronization and distribution. JetFile relies on "peer-to-peer" communication over multicast channels. Most of the traditional file server responsibilities have been decentralized. In particular, the more heavyweight operations such as serving file data and attributes are, in our system, the responsibility of the clients. Some functions such as serializing file updates are still centralized in JetFile. Since serialization is a relatively lightweight operation in our system, serialization is expected to have only minor impact on scalability. We have implemented parts of the JetFile design and have measured its performance over a local-area network and an emulated wide-area network. Our measurements indicate that, using a standard benchmark, JetFile performance is comparable to that of local-disk b..
Spontaneous networking: an application-oriented approach to ad hoc networking
No full textAn ad hoc network must operate independently of a pre-established or centralised network management infrastructure, while still providing administrative services needed to support applications. Address allocation, name resolution, service location, authentication, and access control policies represent just some of the functionality that must be supported - without pre-configuration n or centralised services.
In order to solve these problems, it is necessary to leverage some aspect of the environment in which the network operates. We introduce the notion of a spontaneous network, created when a group of people come together for some collaborative activity. In this case, we can use the human interactions associated with the activity in order to establish a basic service and security infrastructure.
We structure our discussion around a practical real-world scenario illustrating the use of such a network, identifying the key challenges involved and some of the techniques that can be used to address them
Följa upp och synliggöra barns lärprocesser : En kvalitativ studie om hur pedagoger arbetar och resonerar kring hur barns lärprocesser följs upp och synliggörs
No full textTitle: Making learning visible in a preschool setting- A qualitative study of how teachers work and evaluate how children’s learning can be visualized Term: Autumn 2015 Author: Emelie Persson and Annelie Westerlund Mentor: Maria Rosén The objective of this study is to examine how two departments at a preschool work specifically to visualize children’s learning processes, both from a Child Perspective and from the Children's Perspective. The purpose is to investigate questions concerning how teachers follow up and visualize the children’s learning process and how preschool teachers evaluate to what extent children's learning processes should be made visible. The study is qualitative and ethnographically inspired. We have conducted participating observations in order to examine how teachers follow up and visualize children’s learning processes. In addition to this we have made unstructured interviews to examine how preschool teachers evaluate how children's learning processes are visualized. The theoretical starting point we used is Dewey’s Pragmatism which is based on the assumption that children's learning emerge out of their own experiences and interests. The result shows that the pre-school teachers follow up and visualize the children's learning processes in different ways. They incorporate different steps of the process and they structure the environment by having materials easily accessible to the children in order to make learning processes based on children’s interests possible. The teachers act as role models when it comes to vocal expression and through active dialogues they create opportunities for the children to reflect on what they’ve learnt. The teachers also actively work to allow the children to express their thoughts and opinions, and to integrate these into the learning process. The most prominent result of the study showed that the teachers’ interaction with the children were shown by their attendance, responsiveness, commitment, as well as to their showing an interest in the children’s many different worlds of experiences. Keywords: Pre-school, learning processes, children's learning Nyckelord: Förskola, lärprocesser, barns lärand
Följa upp och synliggöra barns lärprocesser : En kvalitativ studie om hur pedagoger arbetar och resonerar kring hur barns lärprocesser följs upp och synliggörs
No full textTitle: Making learning visible in a preschool setting- A qualitative study of how teachers work and evaluate how children’s learning can be visualized Term: Autumn 2015 Author: Emelie Persson and Annelie Westerlund Mentor: Maria Rosén The objective of this study is to examine how two departments at a preschool work specifically to visualize children’s learning processes, both from a Child Perspective and from the Children's Perspective. The purpose is to investigate questions concerning how teachers follow up and visualize the children’s learning process and how preschool teachers evaluate to what extent children's learning processes should be made visible. The study is qualitative and ethnographically inspired. We have conducted participating observations in order to examine how teachers follow up and visualize children’s learning processes. In addition to this we have made unstructured interviews to examine how preschool teachers evaluate how children's learning processes are visualized. The theoretical starting point we used is Dewey’s Pragmatism which is based on the assumption that children's learning emerge out of their own experiences and interests. The result shows that the pre-school teachers follow up and visualize the children's learning processes in different ways. They incorporate different steps of the process and they structure the environment by having materials easily accessible to the children in order to make learning processes based on children’s interests possible. The teachers act as role models when it comes to vocal expression and through active dialogues they create opportunities for the children to reflect on what they’ve learnt. The teachers also actively work to allow the children to express their thoughts and opinions, and to integrate these into the learning process. The most prominent result of the study showed that the teachers’ interaction with the children were shown by their attendance, responsiveness, commitment, as well as to their showing an interest in the children’s many different worlds of experiences. Keywords: Pre-school, learning processes, children's learning Nyckelord: Förskola, lärprocesser, barns lärand
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