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eLCAP: A web application for environmental life cycle assessment of pavements focused on California
Published in John Harvey, Imad L. Al-Qadi, Hasan Ozer, Gerardo Flintsch, Pavement, Roadway, and Bridge Life Cycle Assessment 2020, 2020
John T. Harvey*, Jon Lea, Arash Saboori, Maryam Ostovar, Ali Azhar Butt
Figure 5 shows the list of software used by Caltrans in managing the transportation infrastructure in California and the database and models used in each. The software with an asterisk in their title are either created or maintained by UCPRC. Each model can have one or multiple data sources which are shown by the arrows that connect the databases to each model. Similarly, each model is used in one or more software. For example, the PaveM Network Performance Models take data from 5 different databases: Caltrans performance measurement system (PeMS) which stores data related pavement condition indices, Caltrans GIS and linear referencing system (LRS) database which contains mapping data, Caltrans traffic and weigh in motion (WIM) database which contains traffic count and truck axle load data, Caltrans as-built maps and test results of core samples and ground penetrating radar (GPR) which provide structural details of pavement sections, and Caltrans automated pavement condition survey (APCS) database.
Implementation of Voice over Internet Protocol (VoIP) using softphone applications based on Session Initiation Protocol (SIP)
Published in Yuli Rahmawati, Peter Charles Taylor, Empowering Science and Mathematics for Global Competitiveness, 2019
A. Jaenul, M. Yusro, B. Maruddani
After designing the network topology used in this study, implementing VoIP in the Said Na’um Education Foundation and in all school units of the foundation, and testing and analyzing the data collected, it can be concluded that Voice over Internet Protocol (VoIP) can be used for local (adjacent) areas. To make the VoIP system, the Trixbox CE operating system can be used as a server that already has the Centos Linux operating system and Asterisk application, while (softphone) clients can use the 3CX and Zoiper applications. Based on studies conducted in VoIP testing, the minimum bandwidth required to communicate in VoIP is 64 Kbps according to the codec used, namely, G.711 with a bit rate of 64 Kbps. However, to get better voice quality, a higher bandwidth than that used in this study can be used.
Design and implementation of a VoIP PBX integrated Vietnamese virtual assistant: a case study
Published in Journal of Information and Telecommunication, 2023
Hai Son Hoang, Anh Khoa Tran, Thanh Phong Doan, Huu Khoa Tran, Ngoc Minh Duc Dang, Hoang Nam Nguyen
One essential component of a VoIP network is a PBX. In the context of corporate websites, Asterisk has become the most convenient solution. Asterisk is an open-source Linux-based PBX gaining momentum in the VoIP industry (Martin et al., 2018; Montazerolghaem et al., 2016; Nuño et al., 2020; Senthil Kumar et al., 2015; Suwannaraj & Boonkrong, 2014). Asterisk enables development of an inexpensive rich IP telephony service (Dabbebi et al., 2013) supported by standard and widely used protocols such as the Session Initiation Protocol (SIP) and Real-time Transport Protocol (RTP). Asterisk facilitates communication between terminals with one or more lines connected to the PSTN. In this way, the terminals can establish calls over the Internet or with other terminals in the PSTN. Other Asterisk functions include voicemail, call scheduling, and Interactive Voice Response (IVR).
Secure medical digital twin via human-centric interaction and cyber vulnerability resilience
Published in Connection Science, 2022
Two datasets (Lin et al., 2021) are used in the empirical study to evaluate the performance of advanced neural learning for MDT vulnerability detection. The real-world dataset consists of 12 open-source software projects and libraries, including Asterisk, Httpd, Imagemagick, LibPNG, LibTIFF, OpenSSL, Pidgin, qemu, samba, VLCPlayer and Xen. It is a dual-granularity vulnerability detection dataset, providing labelled file-level and function-level vulnerabilities according to the information from the public NVD (https://nvd.nist.gov/) and CVE (https://cve.mitre.org/). The NVD is the U.S. government repository of standards-based vulnerability management data. The mission of the CVE program is to identify, define and catalogue publicly disclosed cybersecurity vulnerabilities. Our experiments use about 2000 vulnerable functions and 130,000 non-vulnerable functions for performance evaluation. Our synthetic vulnerability dataset contains function samples from the SARD project, artificially constructed code fragments based on known vulnerability patterns.
NomadicBTS: Evolving cellular communication networks with software-defined radio architecture and open-source technologies
Published in Cogent Engineering, 2018
Emmanuel Adetiba, Victor O. Matthews, Samuel N. John, Segun I. Popoola, Abdultaofeek Abayomi
As illustrated in Figure 1, the VoIP PABX carries out functions like call control and mobility management. It also implements voice mail server and VoIP gateway. The VoIP gateway provides interconnection to the PSTN and to the traditional GSM network using SIP and Real-time Transport Protocol (RTP) via an Internet Telephony Service Gateway (ITSG). In this study, the VoIP PABX section of the NomadicBTS architecture was realized using Asterisk, which is a leading software VoIP PABX (Imran, Qadeer, & Khan, 2009).