Client-side Modelica powered by Python or JavaScript

Currently, most software developments are focused in creating systems connected to the Internet, which allows to add functionality within a system and facilities to their stakeholders. This leads to depend on a web client, such as a web browser, which allows access to Internet services, data or operations that a system delivers. Within the browser's main components, a rendering engine is in charge of obtaining a convenient data structure as an output for a browser process. We developed a Web Browser Communication pattern that describes the infrastructure to allow the communication between a web client (or a web browser) and a server in the Internet. In this paper, we describe the component in charge of the rendering for a obtained web resource within the web browser, named here as Web Browser Content Renderer. In this work we have described this component as a pattern, to describe how a browser's rendering engine works and interacts with other subsystems. Patterns combine experience and good practices to obtain models that can be used for new designs, to compare and select systems/applications or to teach others. The audience to which our paper is focused are browser developers, web application developers, researchers and teachers, being the first two the most important.

This paper presented a method to visualize Internet forums on the client side. Enhancement to web browsing was proposed to solve problems in information retrieval from forums. Specifically, visualization of structural information provided useful overviews for web browsing. A conceptual model described forums as three-dimensional spaces with information objects as points and web browsing as movements in the spaces. A series of diagrams were proposed to provide overviews for users’ web browsing movements. Implementation of the visualization system and examples of the diagrams were presented in the paper.KeywordsVisualizationInternet Forums

The mapping of DNA-protein interactions is crucial for a full understanding of transcriptional regulation. Chromatin-immunoprecipitation followed by massively parallel sequencing (ChIP-seq) has become the standard technique for analyzing these interactions on a genome-wide scale. We have developed a software system called CASSys (ChIP-seq data Analysis Software System) spanning all steps of ChIP-seq data analysis. It supersedes the laborious application of several single command line tools. CASSys provides functionality ranging from quality assessment and -control of short reads, over the mapping of reads against a reference genome (readmapping) and the detection of enriched regions (peakdetection) to various follow-up analyses. The latter are accessible via a state-of-the-art web interface and can be performed interactively by the user. The follow-up analyses allow for flexible user defined association of putative interaction sites with genes, visualization of their genomic context with an integrated genome browser, the detection of putative binding motifs, the identification of over-represented Gene Ontology-terms, pathway analysis and the visualization of interaction networks. The system is client-server based, accessible via a web browser and does not require any software installation on the client side. To demonstrate CASSys's functionality we used the system for the complete data analysis of a publicly available Chip-seq study that investigated the role of the transcription factor estrogen receptor-α in breast cancer cells.

A SIP-based web client for HTTP session mobility and multimedia services

The SSL/TLS protocol is the de-facto standard for secure Internet communications, and supported by virtually all modern e-mail clients and Web browsers. With more and more PDAs and cell phones providing wireless e-mail and Web access, there is an increasing demand for establishing secure SSL/TLS connections on devices that are relatively constrained in terms of computational resources. In addition, the cryptographic primitives executed on the client side need to be protected against side-channel analysis since, for example, an attacker may be able to monitor electromagnetic emanations from a mobile device. Using an RSA-based cipher suite has the advantage that all modular exponentiations on the client side are carried out with public exponents, which is uncritical regarding performance and side-channel leakage. However, the current migration to AES-equivalent security levels makes a good case for using an Elliptic Curve Cryptography (ECC)-based cipher suite. We show in this paper that, for high security levels, ECC-based cipher suites outperform their RSA counterparts on the client side, even though they require the integration of diverse countermeasures against side-channel attacks. Furthermore, we propose a new countermeasure to protect the symmetric encryption of messages (i.e. “bulk data”) against Differential Power Analysis (DPA) attacks. This new countermeasure, which we call Inter-Block Shuffling (IBS), is based on an “interleaved” encryption of a number of data blocks using a non-feedback mode of operation (such as counter mode), and randomizes the order in which the individual rounds of the individual blocks are executed. Our experimental results indicate that IBS is a viable countermeasure as it provides good DPA-protection at the expense of a slight degradation in performance.

In this work, we raise a question on why the abundant information previously shared between a server and its client is not effectively utilized in the exchange of a new data which may be highly correlated with the shared data. We formulate this question as an encoding problem that is applicable to general data synchronization services including a wide range of Internet services such as cloud data synchronization, web browsing, messaging, and even data streaming. To this problem, we propose a new encoding technique, SyncCoding that maximally replaces subsets of the data to be transmitted with the coordinates pointing to the matching subsets included in the set of relevant shared data, called references. SyncCoding can be easily integrated into a transport layer protocol such as HTTP and enables significant reduction of network traffic. Our experimental evaluations of SyncCoding implemented in Linux shows that it outperforms existing popular encoding techniques, Brotli, LZMA, Deflate, and Deduplication in two practical use networking applications: cloud data sharing and web browsing. The gains of SyncCoding over Brotli, LZMA, Deflate, and Deduplication in the encoded size to be transmitted are shown to be about 12.4%, 20.1%, 29.9%, and 61.2% in the cloud data sharing and about 78.3%, 79.6%, 86.1%, and 92.9% in the web browsing, respectively. The gains of SyncCoding over Brotli, LZMA, and Deflate when Deduplication is applied in advance are about 7.4%, 10.6%, and 17.4% in the cloud data sharing and about 79.4%, 82.0%, and 83.2% in the web browsing, respectively.

Cryptography is one of the key elements in providing security for modern e‐commerce systems. It is well known that software‐based encryption has built‐in security weaknesses due to storing and managing digital certificates/keys in a high‐risk environment such as a local hard disk or software. This makes embedded hardware encryption a superior solution. However, most existing embedded hardware encryption modules need additional dedicated software in order to implement a secure e‐commerce application, which increases cost as well as adds complexity. In this paper, a new embedded hardware DSP (digital signal processor) encryption module, using the RSA (Rivest, Shamir, and Adleman) algorithm, is developed for secure e‐commerce transactions from the client side. The goal is to seamlessly integrate the embedded DSP hardware encryption module, which combines computational power and flexibility in programming, with a widely available web browser that provides the required e‐commerce functions. The integrated system can store and process security sensitive data inside the plug‐in hardware. The proposed scheme tries to maximize security strength while limiting overheads by utilizing a widely available web browser to perform e‐commerce functions such as product searching, etc. A fully functional web e‐commerce system has been developed as a proof of concept. Our major contribution is a design of a functional RSA plug‐in encryptor which can store and encrypt sensitive information originated from the e‐commerce process using standard web browsers. Implementation details addressing challenging issues such as big integer, large message, and communication components have been provided which have never been reported in the public literature. This can be very useful for real‐life industry security applications. Copyright © 2010 John Wiley & Sons, Ltd.

This thesis provides a detailed analysis of the effects of TCP and UDP traffic over a LAN and WAN medium. In addition, it also analyses some real time applications like audio, video and web browsing that is affected by TCP traffic while sharing a bottleneck node and/or link resources. As network industry is growing continuously, the network administrator should be aware of TCP and UDP traffic that is traversing through their network. The analysis and monitoring of the traffic is crucial as it directly affects the performance of the network. Finding a cause for the poor performance of the network is quite important because it gives an idea to troubleshoot and resolve the issues effectively. In this thesis, we have created topologies using Cisco’s Virtual Internet Routing Lab (VIRL) [7]. They replicate an organizational infrastructure with client-server environment in LAN and WAN. Routing protocols such as OSPF and BGP are used to mimic the real world internet. A built-in LXC-iperf tool is used to generate the TCP and UDP traffic. During the generation of the traffic, various parameters are changed or controlled to see their effect on the network performance. As a learning and informative research, this thesis considers several Quality of Service (QoS) parameters that characterize the performance of an overall network. In particular, this thesis obtains packet loss, throughput, and jitter as QoS parameters when the resource has both TCP and UDP traffics simultaneously. We have examined, the effects on (i) TCP throughput and packet loss and (ii) UPD packet loss and jitter of (a) real time audio, (b) video, and (c) web browsing applications. These parameters examine how the traffic be manipulated to keep minimum packet loss, minimum jitter and maximum throughput. It is needless to say that all are competing with each other (TCP/UDP traffic) for sharing bottleneck resources. We have used a sample time of 15 seconds for each of our experimental results presented in this thesis. Our analysis shows that the best performance of the real time video and audio application is obtained when we select large size packet but its size being less than MTU of the link (without reducing the data rates). Similarly, in case of web browsing, we notice that throughput increases by increasing the window size and decreasing the latency. Efficient outcomes with the traffic analysis are achieved only if the experiments are carried out with adequate amount of attention.

Integrating deep learning into clinical workflows for medical image analysis holds promise for improving diagnostic accuracy. However, strict data privacy regulations and the sensitivity of clinical IT infrastructure limit the deployment of cloud-based solutions. This paper introduces WebIPred, a web-based application that loads deep learning models directly within the client's web browser, protecting patient privacy while maintaining compatibility with clinical IT environments. WebIPred supports the application of pre-trained models published on Zenodo and other repositories, allowing clinicians to apply these models to real patient data without the need for extensive technical knowledge. This paper outlines WebIPred's model integration system, prediction workflow, and privacy features. Our results show that WebIPred offers a privacy-protecting and flexible application for image classification, only relying on client-side processing. WebIPred combines its strong commitment to data privacy and security with a user-friendly interface that makes it easy for clinicians to integrate AI into their workflows.

Given the undeniable popularity of the Web, providing efficient and secure access to remote databases using a Web browser is crucial for the emerging cooperative information systems and applications. In this paper, we evaluate all currently available Java-based approaches that support persistent connections between Web clients and database servers. These approaches include Java applets, Java Sockets, Servlets, Remote Method Invocation, CORBA, and mobile agents technology. Our comparison is along the dimensions of performance and programmability.

Chapter 7 - Client Configuration

Umple is an open-source software modeling tool and compiler. It incorporates textual language constructs for UML modeling, including associations and state machines. It includes traits, aspects, and mixins for separation of concerns. It supports embedding methods written in many object-oriented languages, enabling it to generate complete multilingual systems. It provides comprehensive analysis of models and generates many kinds of diagrams, some of which can be edited to update the Umple code. Umple runs on the command line, in a web browser or in integrated development environments. It is designed to help developers reduce code volume, while they develop in an agile, model-driven manner. Umple is also targeted at educational users where students are motivated by its ability to generate real systems from their software models.

As composite materials are gaining wide acceptance in aircraft structures, the repair of damaged composites is becoming an important issue. Composite repair, however, has been performed more or less in a manual fashion, an integrated repair system is desirable. In this paper, an Internet-based advisory service (Repair Advisory Service, RAS) for composite repair is proposed to increase the efficiency of the repair process. Based on the client-server architecture, RAS offers time-effective sharing of engineering knowledge between remote locations, easy maintenance and update of the application software, and ubiquitous access to the services. The web browser is used as the user interface, which provides an easy access to the service and software friendly environment. The RAS system provides integrated design and repair tools for repair technicians and engineers as follows: (1) A design software for scarf repair and lap repair estimates the tensile failure and shear failure of repaired structures. (2) A structural repair manual is provided in the PDF document for viewing, and a web search engine can search the document. (3) A fabrication module of RAS generates a CNC toolpath to cut repair patches. (4) A CNC-based prepreg cutting machine has been developed to implement an automated composite repair. A scenario for the web-based remote repair was proposed, and a test repair was performed on an aircraft wing. The RAS service is open to public and available at http://fab.snu.ac.kr/ras.

The paper covers heterogeneous multi-tier environments based on CORBA and Java. On the client side there is a Web browser that connects to the middle tier through CORBA-based Java applets. The business logic is decoupled from the database server on the third tier. Access to the databases is made through a JDBC interface or with embedded SQL. We present considerations about the use of different browsers and multiple ORBs, concentrating on interoperability issues. We explore the problems that have to be faced and give practical advice on how to make things work.

The system architecture adopts the B/S (Browser/Server) structure. The client side does not require installation of any specialized software; a web browser is sufficient to access and use the monitoring system, enabling energy consumption monitoring anytime and anywhere. It offers good scalability, as future functional expansions and upgrades to the software only need to be implemented on the server side. Anyone can browse and use this system, making energy-saving promotion more extensive and effective.