UNIX Research Articles

Building a cloud-based solution

Northern Kentucky University (NKU) has Computer Science/Computer Information Technology curricula that require students to have administrative access to both Unix and Windows operating systems. The...

Research and Design of the Communication Middleware for the Distributed System

This article on inter-process communication mechanism has conducted in-depth research and analysis of traditional UNIX system under the environment of the inter process communication mechanism and existing mechanisms for process communication in distributed environment. And on that basis propose new interprocess communication mechanism in distributed environment. Given interprocess communication semaphores and Message Queuing design ideas and implementation details, and compare it with the traditional way, we concluded that in the case of performance does not deteriorate, provides better user interfaces and location transparency and access higher transparency.

Marching towards a satisfactory FEM graphical user's interface

With new operating systems sophisticated new graphics tools have appeared with the aim of facilitating the interaction between the user and the computer. In the Unix world they bear names like Curses, X windows, Xt Intrinsics, Athena widgets (Xaw), Xray widgets and OSF/Motif widgets. The programmer of FEM applications has to be aware of these tools because they ease the user's task considerably. This paper describes some experiences with the new tools which will be employed during the pre– and post–processing phase. The title of the paper hints that we are marching towards a goal and will arrive stepwise at intermediate goals as developments occur. This paper reflects some of the recent steps marked by the products named above.

HIERARCHICAL CLUSTERING ALGORITHM FOR DETECTING ANOMALOUS PROFILES IN COMPUTER SYSTEMS

We introduce a new intrusion detection method based on the Hierarchical Clustering Algorithm (HCA), to detect anomalous user’s profiles. In the Unix system, a simple user has only some privileges (can access to some resources), but the root user has more privileges. So, we can speak here about hierarchy of users. By the same way, we can use a hierarchy of users in intrusion detection field, to distinguish between the normal user and suspicious user. Many data mining methods were already used in previous works in intrusion detection. Even if some of them led to interesting results, but they still suffer from some weaknesses. This is the reason why we focused in this study on the use of the HCA to detect anomalous profiles. A survey of intrusion detection methods is presented. The HCA procedure is described in detail. Our simulation results demonstrate the robustness of our approach in comparison to some previous used methods.

Top++: A program for the calculation of the top-pair cross-section at hadron colliders

We present the program Top++ for the numerical evaluation of the total inclusive cross-section for producing top quark pairs at hadron colliders. The program calculates the cross-section in (a) fixed order approach with exact next-to-next-to leading order (NNLO) accuracy and (b) by including soft-gluon resummation for the hadronic cross-section in Mellin space with full next-to-next-to-leading logarithmic (NNLL) accuracy. The program offers the user significant flexibility through the large number (29) of available options. Top++ is written in C++. It has a very simple to use interface that is intuitive and directly reflects the physics. The running of the program requires no programming experience from the user. Program summaryProgram title: Top++ (ver. 2.0)Catalogue identifier: AETR_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AETR_v1_0.htmlProgram obtainable from: CPC Program Library, Queen’s University, Belfast, N. IrelandLicensing provisions: GNU General Public LicenseNo. of lines in distributed program, including test data, etc.: 15896No. of bytes in distributed program, including test data, etc.: 695919Distribution format: tar.gzProgramming language: C++.Computer: any running a unix operating system. Program was developed and tested with GNU Compiler Collection, C++ compiler.Operating system: Linux; Mac OS X; can be adapted for other unix systems.RAM: typically less than 200 MB.Classification: 11.1.External routines: GNU Scientific Library (GSL); the Les Houches Accord pdf Interface (LHAPDF).Nature of problem:computation of the total cross-section in perturbative QCD.Solution method:numerical integration of the product of hard partonic cross-section (with or without soft gluon resummation) with two parton distribution functions.Additional comments:sub per-mill accuracy achievable in realistic time (program does not employ Monte Carlo methods).Running time:depending on the options. The program is optimized for speed.

AB1097 Development of Statistical Analysis and Computer Tablet Based Clinical Score Input System on the Electronic Medical Record for Rheumatoid Arthritis

BackgroundIn clinical research, statistical analysis of clinical data is a costly process. Its cost is composed of data input, data store and statistical analysis. As usually clinical score is recorded...

Longyuan Spare Parts Management System Development

This paper studies the design and use of spare parts and system management module, and designed a development model based on B/S architecture. System using MVC framework, using AJAX pages, data and business separation and a series of advanced technologies developed for the management of spare parts. System design mainly uses high-performance UNIX system database server and a set of easy to maintain Windows Server2003 system as an application server, middleware using open source Tomcat, database using the Oracle database, ensure the system's high availability and high cost. The function module is based on B/S model include: procurement module, inventory management module, allocation management module, quota management module statistics query module and module-based information management and system maintenance module, the system message announcement. Spare parts management system and the advantages are analyzed to prove that the system is capable of successful application.

MLST@SNaP: user-friendly software for simplification of multilocus sequence typing and dissemination of microbial population analyses

Summary 1. Microbial multilocus sequence typing is a course-grained approach for classifying micro-organisms that involves intense gene sequencing, limiting its application in clinical and research laboratories. Multiplexes targeting single-nucleotide polymorphisms might replace this impractical method by providing the SNaP profile. We here describe MLST@SNAP, a fast, user-friendly and automated process to convert thousands of MLST sequences or sequence types into SNaP profiles and vice versa. The software largely increases the promptness of microbial population data analyses, being presently designed for the micro-organisms Aspergillus fumigatus, Burkholderia cenocepacia, Burkholderia cepacia, Burkholderia contaminans and Pseudomonas aeruginosa. 2. MLST@SNAP is freely available for MACINTOSH, UNIX and WINDOWS systems as supplementary material of this manuscript, at https://www.mediafire.com/folder/kc4fwabtb8lu1/setupMLST%40SNaP and http://www.portugene.com/MLSTSNaP.html accompanied by tutorial, example files and some data.

NT 서버 통합 가상화를 통한 전산센터 유지보수 절감에 대한 연구

본 논문에서는 노후화된 NT 서버를 중심으로 서버 통합 가상화를 구축하고 이에 따른 효과 분석을 통해 다음과 같은 결과를 제시하였다. 첫째, 다수의 물리적인 서버를 가상화 통합 서버에 탑재하여 전산 데이터 센터의 상면공간확보로 인한 항온항습기의 효율 증가를 얻을 수 있었다. 둘째, 노후화된 대형서버의 가상화 탑재로 전력 사용량 감소 및 신규 서버도입에 따른 추가 하드웨어 도입감소로 전산데이터센터 유지비용과 신규 자원 도입에 따른 비용 절감 효과를 도출할 수 있었다. 상면 절감 효과는 89%, 전력과 냉방 소비량은 기존 대비 79% 정도 절감 효과를 얻었다. 이러한 NT 서버 통합 가상화는 현재 뿐만 아니라 추후에도 전산센터의 유지보수 비용을 주는데 기여하고 Green-IT로의 변화를 기대 할 수 있다. 본 논문에서 적용한 가상화 서버 통합 구축 방법은 UNIX 계열 및 기타 다른 서버군을 통합 할 때도 동일하게 적용할 수 있다. In this paper, we build server consolidate virtualization focusing on NT server dilapidated and through analysis of the effect of this, has been presented the following results. First, it was possible to obtain an increase in the constant temperature constant humidity chamber efficiency by securing the upper surface space for computing data center mounted virtualization integration server servers multiple physical. Second, by the deployment of virtualization of a large server dilapidated, the introduction of new resources and the cost of maintaining computerized data center and reduce power consumption, the reduction of hardware introduction of additional due to the new server deployment it was possible to derive a cost reduction effect. We obtain the reduction of 89% and 79% compared with conventional consumption of cooling and power savings of the top surface, respectively. Integration of NT servers are virtualized can be expected to change in the Green-IT to contribute to providing the maintenance costs of computing centers in the future as well as current. Building a virtualization server integration applied in this paper can be similarly applied to the UNIX system and to integrate the server group other.

Evolving classification of UNIX users’ behaviors

A computer can keep track of computer users to improve the security in the system. However, this does not prevent a user from impersonating another user. Only the user behavior recognition can help to detect masqueraders. Also, knowledge about computer users can be very beneficial for assisting them or predicting their future actions. Under the UNIX operating system, users type several commands which can be analyzed in order to create user profiles. In this research, a computer user behavior is represented by a sequence of UNIX commands. From these sequences of commands, a profile that defines its behavior is defined. In addition, a computer user behavior usually changes constantly. If the behavior recognition is done automatically, these changes need to be taken into account. For this reason, we propose in this research a simple evolving method that is able to keep up to date the computer user behavior profiles. This method is based on Evolving Fuzzy Systems and it is evaluated using real data streams.

Traffic Congestion Detection in Vehicular Adhoc Networks using GPS

The invention relates to the sphere of traffic congestion detection, and relates to a traffic congestion detecting system and technique. Vehicles will directly communicate with each other and with infrastructure; a wholly new paradigm for vehicle safety applications will be created. New challenges are created by high vehicle speeds and extremely dynamic operational environments. New necessities, necessitated by new safety-of-life applications, embody new expectations for high packet delivery rates and low packet latency. Vehicles generate and analyze giant amounts of information, though typically this information is self-contained inside one vehicle. With a VANET, the prospect of awareness for the vehicle or driver drastically will increase. Here we have a tendency to outline such variety of communication and information flow between vehicles and infrastructure and therefore the results that are created is shown. The survey report of previous done work is additionally mentioned within the literature survey. The simulation tool employed in this analysis and implementation is NCTUns that is very integrated GUI surroundings tool and is predicated on UNIX system platform. During this work we have a tendency to uses GPS device for communication between vehicles and to find their position precisely within the rush or in congestion.

Linux for Academics, Part I

Linux, or GNU/Linux, as it is also known, is an open-source operating system based upon the Unix operating system. It is very popular on Web servers, but there is also a subculture of users who run...

An Improved and Secure Motion Detection Surveillance System in UNIX

These days motion detection in surveillance technology has a trend to deploy to security sectors using radar motion detector, wireless sensors, Micro-Electro-Mechanical Systems (MEMS) Inertial Sensors etc in Unix system. This research focuses on motion detection using combination of optical flow and thresholding methods on Linux platform. Salient configurations, inevitable installation packages and libraries are discussed elaborately. Moreover, script with pseudo code for connecting with remote networking service application has been implemented. Results show a good and convenient security system suitably for home and offices.

THE DIGITAL MOTION CONTROL SYSTEM FOR THE SUBMILLIMETER ARRAY ANTENNAS

We describe the design and performance of the digital servo and motion control system for the 6-meter parabolic antennas of the Submillimeter Array (SMA) on Mauna Kea, Hawaii. The system is divided into three nested layers operating at a different, appropriate bandwidth. (1) A rack-mounted, real-time Unix system runs the position loop which reads the high resolution azimuth and elevation encoders and sends velocity and acceleration commands at 100 Hz to a custom-designed servo control board (SCB). (2) The microcontroller-based SCB reads the motor axis tachometers and implements the velocity loop by sending torque commands to the motor amplifiers at 558 Hz. (3) The motor amplifiers implement the torque loop by monitoring and sending current to the three-phase brushless drive motors at 20 kHz. The velocity loop uses a traditional proportional-integral-derivative (PID) control algorithm, while the position loop uses only a proportional term and implements a command shaper based on the Gauss error function. Calibration factors and software filters are applied to the tachometer feedback prior to the application of the servo gains in the torque computations. All of these parameters are remotely adjustable in the software. The three layers of the control system monitor each other and are capable of shutting down the system safely if a failure or anomaly occurs. The Unix system continuously relays the antenna status to the central observatory computer via reflective memory. In each antenna, a Palm Vx hand controller displays the complete system status and allows full local control of the drives in an intuitive touchscreen user interface. The hand controller can also be connected outside the cabin, a major convenience during the frequent reconfigurations of the interferometer. Excellent tracking performance (~ 0.3′′ rms) is achieved with this system. It has been in reliable operation on 8 antennas for over 10 years and has required minimal maintenance.

Proposed Isomorphic Graph Model for Risk Assessment on a Unix Operating System

Control and risk are the two parts of the coin. Risk assessment is the process of identifying uncertainties, vulnerabilities and threats to the operating system resources in order to achieve business objectives. Risk evaluation involved deciding what counter measures to take in reducing uncertainty to the lowest level of risk. Control is probably the most important aspect of communications security and becoming increasingly important as basic building block for system security. Advanced Encryption Standard (AES) is a primary method of protecting system resources. AES is inversely proportional to the Risk (C=K/R) & mean while control is directly proportional to the quality of standard. AES Control will be optimize the risk as well as improve the IS standard. Control is directly proportional to risk mitigation & mitigation is directly proportional to standard. This paper contributes to the development of an optimization method that aims to determine the optimal cost to be invested into security method, model & mechanisms deciding on the measure component of operating system resources (i.e. Processor, Memory & Encryption). Furthermore, the method & mechanism optimize the cost, time & resources is supposed to optimize the system risks. The proposed model would be update the value of Processor, Memory & Encryption key dynamically as per business requirement and availability of technology & resources. Proposed model is going to be optimizing risk and maximizing the performance. In this study the researchers develop an isomorphic graph model for optimizing risk in the Unix operating system.

Non-linear real-time expert water management telematics system for leaks control

The design of a non-linear real-time expert water management telematics system is proposed, in order to minimize the waste of 15% to 40% of the water supplies in the ground pipe networks, because of the leakage. This expert system will work by using the step testing method, and it will be therefore possible to determine the approximate location of leakage for every big urban area. Furthermore, ARC/INFO Geographic Information Systems (GIS) working under the UNIX-operating system in X-Windows are used in the Workstation of the Central Station (CS) in order to handle data. The proposed real-time expert system will be non-linear in its responses and a part of the programming language will be fourth generation real-time software working under real-time logic.

A Unix-Based Telecom Billing System

With the development of computer technology, people are no longer satisfied with a single operating system. More and more people like to use UNIX system because of its high reliability, good open, and powerful network features. The design of this telecommunications billing system is based on Browser / Server model using the java language for the UNIX platforms laboratory environment. The system can accurately time and automatically charge according to the business types when the user rents the server, and to complete information management of the server and user. This system is simple, friendly interface. It reduces operating costs of the telecommunications operators and improves productivity of them.

Automated Control for Risk Assessment on Unix Operating System - I

Control and Risk are the two parts of the coin. Risk management is the process of identifying vulnerabilities and threats to operating system resources to achieving business objectives and deciding what counter measures to take in reducing the lowest level of risk. The increased use of computer & communications system by IT industries has increased the risk of theft of proprietary information. Cryptographic control (Encryption) is a primary method of protecting system resources. Automated Control is probably the most important aspect of communications security and becoming increasingly important as basic building block for computer security. Automated Control is inversely proportional to the risk & mean while control is directly proportional to the quality of standard (S). Automated Control provides accountability for individuals who are accessing sensitive information on application, system software, server and network. This accountability is accomplished through access control mechanisms that require identification, authentication, authorization, non-repudiation, availability, reliability & integrity through the audit function. We have to develop java automated control for risk optimization based on unix operating system.

Scalable MD5 Crypt Cracker on PetaScale Supercomputer

MD5 Crypt is a cryptographic algorithm used commonly in UNIX system for authentication. Thanks to the additional randomization of the salt and complexity of the scheme, it makes the traditional password cracking techniques invalid on common computing systems so that the security of the system is guaranteed. As a result of the thriving of petaflops heterogeneous supercomputer system in recent decades, the security of MD5 Crypt is facing a threat of brute-force attack again. However, the complexity of heterogeneous programming and the sophistication of large-scale parallelism still hamper the password recovering. In this paper, we implemented brute-force attack of MD5 Crypt on Tianhe-1A，the world’s fastest supercomputer， by organizing the assignment between CPU and GPU reasonably and making several optimizations according to MD5 Crypt for GPU. Based on the experimental results, our algorithm achieves a great scalability. It checked more than 1.8 billion passwords in a second on the full system. Thus it issues a new challenge to the security of MD5 crypt for authentication.

Rapid Development of Interferometric Software Using MIRIAD and Python

ABSTRACTState-of-the-art radio interferometers are complex systems that unleash torrents of data. If current and planned instruments are to routinely meet their performance goals, standard analysis techniques must be significantly improved, becoming simultaneously more sophisticated, more automatic, and more scalable. While there is no shortage of ideas for next-generation algorithms, there is a shortage of development resources, so it is vital that programming environments for interferometric software allow for rapid, flexible development. We present an open-source software package, miriad-python, that provides access to the MIRIAD interferometric reduction system in the Python programming language. The modular design of MIRIAD and the high productivity and accessibility of Python provide an excellent foundation for rapid development of interferometric software. Several other projects with similar goals exist, and we describe them and compare miriad-python with them in detail. Along with an overview of the package design, we present sample code and applications, including the detection of millisecond astrophysical transients, determination and application of nonstandard calibration parameters, interactive data visualization, and a reduction pipeline using a directed acyclic graph dependency model analogous to that of the traditional UNIX tool make. The key aspects of the miriad-python software project are documented. We find that miriad-python provides an extremely effective environment for prototyping new interferometric software, though certain existing packages provide far more infrastructure for some applications. While equivalent software written in compiled languages can be much faster than Python, there are many situations in which execution time is profitably exchanged for speed of development, code readability, accessibility to nonexpert programmers, quick interlinking with foreign software packages, and other virtues of the Python language.