Open Source OS Research Articles

Smart Agent and Modified Master-Backup Algorithm for Auto Switching Dynamic Host Configuration Protocol Relay through Wireless Router

Several problems happened in a wireless router which is the number of clients that connected to DHCP (Dynamic Host Configuration Protocol) services and also durability in connectivity. Wireless router which is used in the office nowadays usually has a small memory and also CPU power. Memory or CPU sometimes could be running out when a wireless router does some background services. DHCP is one of the services needed to run in a wireless router. DHCP is interrupted when memory or CPU is full. DHCP relay and modification of the backup algorithm needed to overcome this situation when the memory or CPU in the wireless router is limited. The modification of the backup algorithm is a mechanism to switch the main router with the backup router when the main router memory is busy. DHCP relay could become a DHCP server directly when the main router is busy. Wireless router in another side could be formatted with open-source OS such as OpenWRT to become bridge interface that connected to DHCP relay. The scenario that tested in this research is using Cisco DHCP relay services in combination with OpenWRT wireless router, in variation with Mikrotik original “capsman” protocol with DHCP relay in combination with wireless-enabled Mikrotik and also in combination with OpenWRT wireless router. The result shows that OpenWRT in configuration with DHCP relay and backup algorithm could extend the number of a client connected, and also the durability of the wireless router runs its services as DHCP forwarder to DHCP relay and DHCP server. Theoretically, the number of the client that could connect in class C IPv4 address is 253 clients. Practically, in some wireless router brand, the number of the client is limited to 15 to 30 clients because that number is an optimal client for consuming the bandwidth. DHCP relay scenario could extend that limit to have a larger number of the client, and the new backup algorithm in combination also doesn’t decrease IP release time significantly from usual DHCP using a direct connection.

Toward autonomous additive manufacturing: Bayesian optimization on a 3D printer

Materials exploration and development for three-dimensional (3D) printing technologies is slow and labor-intensive. Each 3D printing material developed requires unique print parameters be learned for successful part fabrication, and sub-optimal settings often result in defects or fabrication failure. To address this, we developed the Additive Manufacturing Autonomous Research System (AM ARES). As a preliminary test, we tasked AM ARES with autonomously modulating four print parameters to direct-write single-layer print features that matched target specifications. AM ARES employed automated image analysis as closed-loop feedback to an online Bayesian optimizer and learned to print target features in fewer than 100 experiments. In due course, this first-of-its-kind research robot will be tasked with autonomous multi-dimensional optimization of print parameters to accelerate materials discovery and development in the field of AM. The combining of open-source ARES OS software with low-cost hardware makes autonomous AM highly accessible, promoting mainstream adoption and rapid technological advancement.Impact statementThe discovery and development of new materials and processes for three-dimensional (3D) printing is hindered by slow and labor-intensive trial-and-error optimization processes. Coupled with a pervasive lack of feedback mechanisms in 3D printers, this has inhibited the advancement and adoption of additive manufacturing (AM) technologies as a mainstream manufacturing approach. To accelerate new materials development and streamline the print optimization process for AM, we have developed a low-cost and accessible research robot that employs online machine learning planners, together with our ARES OS software, which we will release to the community as open-source, to rapidly and effectively optimize the complex, high-dimensional parameter sets associated with 3D printing. In preliminary trials, the first-of-its-kind research robot, the Additive Manufacturing Autonomous Research System (AM ARES), learned to print single-layer material extrusion specimens that closely matched targeted feature specifications in under 100 iterations. Delegating repetitive and high-dimensional cognitive labor to research robots such as AM ARES frees researchers to focus on more creative, insightful, and fundamental scientific work and reduces the cost and time required to develop new AM materials and processes. The teaming of human and robot researchers begets a synergy that will exponentially propel technological progress in AM.

Smart Agent and Modified Master-Backup Algorithm for Auto Switching Dynamic Host Configuration Protocol Relay through Wireless Router

Several problems happened in a wireless router which is the number of clients that connected to DHCP ( Dynamic Host Configuration Protocol ) services and also durability in connectivity. Wireless router which is used in the office nowadays usually has a small memory and also CPU power. Memory or CPU sometimes could be running out when a wireless router does some background services. DHCP is one of the services needed to run in a wireless router. DHCP is interrupted when memory or CPU is full. DHCP relay and modification of the backup algorithm needed to overcome this situation when the memory or CPU in the wireless router is limited. The modification of the backup algorithm is a mechanism to switch the main router with the backup router when the main router memory is busy. DHCP relay could become a DHCP server directly when the main router is busy. Wireless router in another side could be formatted with open-source OS such as OpenWRT to become bridge interface that connected to DHCP relay. The scenario that tested in this research is using Cisco DHCP relay services in combination with OpenWRT wireless router, in variation with Mikrotik original “capsman” protocol with DHCP relay in combination with wireless-enabled Mikrotik and also in combination with OpenWRT wireless router. The result shows that OpenWRT in configuration with DHCP relay and backup algorithm could extend the number of a client connected, and also the durability of the wireless router runs its services as DHCP forwarder to DHCP relay and DHCP server. Theoretically, the number of the client that could connect in class C IPv4 address is 253 clients. Practically, in some wireless router brand, the number of the client is limited to 15 to 30 clients because that number is an optimal client for consuming the bandwidth. DHCP relay scenario could extend that limit to have a larger number of the client, and the new backup algorithm in combination also doesn’t decrease IP release time significantly from usual DHCP using a direct connection.

Factors Affecting Application Launch Time with Android OS

Android OS is developing very fast, and because of being an open source OS, it is vulnerable to many problems that are manifested to users directly or indirectly. Poor application launch time is one of these problems. In this paper, a set of sixteen experiments is established to distinguish the factors that have the most evident effects on application launch time in Android mobiles. These factors are application, launch and kill, events, and storage. Mann Kendall (MK) test, one way analysis of variance (ANOVA), and Design of Experiment (DOE) are used to prove the influence of factors statistically. As a result of the experiments, the application factor, especially the third party applications level, has the most prominent effects on application launch time, followed by launch and Kill and events, while storage had the least influence.

Android Botnets

Mobile botnets are gaining popularity with the expressive demand of smartphone technologies. Similarly, the majority of mobile botnets are built on a popular open source OS, e.g., Android. A mobile botnet is a network of interconnected smartphone devices intended to expand malicious activities, for example; spam generation, remote access, information theft, etc., on a wide scale. To avoid this growing hazard, various approaches are proposed to detect, highlight and mark mobile malware applications using either static or dynamic analysis. However, few approaches in the literature are discussing mobile botnet in particular. In this article, the authors have proposed a hybrid analysis framework combining static and dynamic analysis as a proof of concept, to highlight and confirm botnet phenomena in Android-based mobile applications. The validation results affirm that machine learning approaches can classify the hybrid analysis model with high accuracy rate (98%) than classifying static or dynamic individually.

Linux OS integrated modular avionics application development framework with apex API of ARINC653 specification

The framework is made to provide tools to develop the integrated modular avionics (IMA) applications, which could be launched on the target platform LynxOs-178 without modifying their source code. The framework usage helps students to form skills for developing modern modules of the avionics. In addition, students obtain deeper knowledge for the development of competencies in the field of technical creativity by using of the framework. The article describes the architecture and implementation of the Linux OS framework for ARINC653 compliant OS application development. The proposed approach reduces ARINC-653 application development costs and gives a unified tool to implement OS vendor independent code that meets specification. To achieve import substitution free and open-source Linux OS is used as an environment for developing IMA applications. The proposed framework is applicable for using as the tool to develop IMA applications and as the tool for development of the following competencies: the ability to master techniques of using software to solve practical problems, the ability to develop components of hardware and software systems and databases, using modern tools and programming techniques, the ability to match hardware and software tools in the information and automated systems, the readiness to apply the fundamentals of informatics and programming to designing, constructing and testing of software products, the readiness to apply basic methods and tools of software development, knowledge of various technologies of software development.

Устройство и архитектура операционной системы реального времени

Modern airliners such as Airbus A320, Boeing 787, and Russian MS-21 use so called Integrated Modular Avionics (IMA) architecture for airborne systems. This architecture is based on interconnection of devices and on-board computers by means of uniform real-time network. It allows significant reduction of cable usage, thus leading to reducing of takeoff weight of and airplane. IMA separates functions of collecting information (sensors), action (actuators), and avionics logic implemented by applied avionics software in on-board computers. International standard ARINC 653 defines constraints on the underlying real-time operation system and programming interfaces between operating system and associated applications. The standard regulates space and time partitioning of applied IMA-related tasks. Most existing operating systems with ARINC 653 support are commercial and proprietary software. In this paper, we present JetOS, an open source real-time operating system with complete support of ARINC 653 part 1 rev 3. JetOS originates from the open source project POK, created by French researchers. At that time POK was the only one open source OS with at least partial support for ARINC 653. Despite this, POK was not feasible for practical usage: POK failed to meet a number of fundamental requirements and was executable in emulator only. During JetOS development POK code was significantly redesigned. The paper discusses disadvantages of POK and shows how we solved those problems and what changes we have made in POK kernel and individual subsystems. In particular we fully rewrote real-time scheduler, network stack and memory management. Also we have added some new features to the OS. One of the most important features is system partitions. System partition is a specialized application with extended capabilities, such as access to hardware (network card, PCI controller etc.) Introduction of system partitions allowed us moving large subsystems out of the kernel and limiting the kernel to the minimal functionality: context switching, scheduling and message pass. In particular, we have moved network subsystem to system partition. This moving reduces kernel size and potentially reduces probability on having bug in kernel and simplifies verification process.

ManPy: an open-source software tool for building discrete event simulation models of manufacturing systems

In this paper, we present a new open-source OS software library for building discrete event simulation objects with focus on manufacturing environments. ManPy stands for 'Manufacturing in Python' but employs a generic approach that can be extended to other types of business processes such as services, logistics and supply chain management. It is written in Python and makes use of the SimPy library to implement a process interaction world view. The goal in developing ManPy is to provide an expandable OS layer of well-defined manufacturing objects, which can be used by users with multiple levels of expertise in discrete event simulation, namely, a super user and an industrial engineer. This object repository follows a structured architecture, allowing developers to extend it, exchange ideas and methodologies, with the goal of forming an OS community. We explain how ManPy is developed on SimPy, present its architecture and give examples of its utilization. We also give insight of how this work is planned to progress in order to attract software developers, modellers and practitioners in an OS community. Copyright © 2015 John Wiley & Sons, Ltd.

A CHANGE OF PROFILE BASED ON LOCATION

In today’s world time management is a big task. There could be the possibility that we may forget to do some important and urgent jobs which could results in a negative way for us. Also we have a trend of using smart phones supporting different tools and applications which could make our life simple. Today devices and phones run on many different types of operating systems such as IOS, Android etc. The proposed study is based on android based devices such as smart phones and tablets running on the Android operating system, since Android is designed to be an open source OS it gives a wide opportunity to any developer to develop and try different applications on such devices. In the proposed system we will discuss about the application which provides the service of automatic profile changing based on the user’s location from one to other (e.g. from normal to work mode or vice versa). It uses internet connection and GPS services to learn about the user’s current location and accordingly it updates the profile.

Spyware Detection in Android Using Hybridization of Description Analysis, Permission Mapping and Interface Analysis

Among all available Mobile OS, Android is an ideal target for attackers due to its huge popularity. Android provides open-source OS and also provides ability to install third party applications that poses threat of user's privacy breach. In this paper, we have a close look at permissions that are granted during installation period. We have proposed a hybrid approach for detection of malicious applications by scanning with different antivirus softwares and comparing all. This hybrid approach depends upon three parameters- Description Mapping, Interface Analysis and Source Code Analysis that defines an application's behaviour i.e. either it behaves malicious or normal.

Early diffusion of smartphones in OECD and BRICS countries: An examination of the effects of platform competition and indirect network effects

Employing the Gompertz model, this study examines macro-level adoption factors of early smartphone diffusion in OECD and BRICS countries. The results of the data analysis suggest that mobile OS competition, mobile network standard competition, open source OS share (platform openness), and price influence the early diffusion of smartphones in OECD countries. However, in BRICS countries, open source OS share (platform openness) and price are the main factors of smartphone diffusion. As the smartphone market continues to grow, it seems that the effects of mobile platform competition and indirect network effects on smartphone diffusion may co-exist in global smartphone markets. In addition, the results of the data analysis suggest that a platform (standard)-neutral policy is important in the growth stage of smartphone markets.Also, analyses of influential factors on smartphone price reveal that the size of the installed base of subscribers and market entry of Android phones in global smartphone markets contribute to decreases in smartphone price in OECD and BRICS countries. In addition, in BRICS smartphone markets, mobile OS competition has an impact on reduction in smartphone prices.

Why Chinese Mobile Phones Sells Their Products in Indonesia

This paper mainly discusses about strategy of China mobile phone manufacturer. Based on the interview with the manufacturer’s representative, we tried to comprehend the strategy behind the China mobile phone raid in Indonesia. As people know that mobile phone industry keeps on growing day by day, especially by the invention of the Android operating system, an open source OS with integrated capability. By having a free licensed OS, mobile phone manufacturer can focus mainly on their hardware development. Mobile phone industry is getting crowded by the appearance of new players from China. As the result of the interview shown, in short, the manufacturers are growing because of their innovations and ideas to create a new product with competitive price, usage of right media for promotion, and persistence in penetrating the Indonesian market. It is also through this paper that we hoped to invite young entrepreneur to join the manufacturing industry, as it is a fast growing industry that will surely be developed by the fresh ideas of the young generation of Indonesia.

The pintos instructional operating system kernel

Pintos is an instructional operating system, complete with documentation and ready-made, modular projects that introduce students to the principles of multi-programming, scheduling, virtual memory, and filesystems. By allowing students to run their work product on actual hardware, while simultaneously benefiting from debugging and dynamic analysis tools provided in simulated and emulated environments, Pintos increases student engagement. Unlike tailored versions of commercial or open source OS such as Linux, Pintos is designed from the ground up from an educational perspective. It has been used by multiple institutions for a number of years and is available for wider use.

Will Linux be computer games' dark horse OS?

Although Linux-based PC games have enjoyed only modest sales, one console giant is betting heavily on the open source OS. Although Linux is not ready to be a consumer-level OS, it remains a threat to Microsoft because of its flexibility. The support that companies like IBM, HP, and Red Hat throw at it doesn't hurt either. All three now use Linux in vertical markets and for back-end systems such as databases and Web servers. For example, IBM recently released Websphere for Linux, which facilitates Web and e-commerce services.

Embedded OSs gain the inside track

Almost every automated system has an embedded OS, and so there is an increasing demand for embedded OS. No single vendor dominates the marketplace. A growing number of companies have released open-source embedded OS, primarily those based on BSD Unix and Linux. These OS have the same appeal that open-source software has in other markets: they are relatively inexpensive and users have access to and can customize the source code. It is thought that they will become the accepted standards. Developments from Windows are also outlined. Developments of new architectures are also considered.

The future of the OS for internet applications

While the main focus of Internetrelated OS activity is on Unix and Windows, a growing number of organizations are using the open-source Linux OS in their servers. Red Hat recently released Red Hat Linux 6.1, which is designed for better performance, scalability, and installation than earlier versions. Thus, no company controls the market for the OS for Internet applications.