Group Communication with OSCORE: RESTful Multiparty Access to a Data-Centric Web of Things

Author(s):  
Cenk Gundogan ◽  
Christian Amsuss ◽  
Thomas C. Schmidt ◽  
Matthias Wahlisch
2021 ◽  
Vol 13 (8) ◽  
pp. 207
Author(s):  
Bander Alzahrani ◽  
Nikos Fotiou

IoT group communication allows users to control multiple IoT devices simultaneously. A convenient method for implementing this communication paradigm is by leveraging software-defined networking (SDN) and allowing IoT endpoints to “advertise” the resources that can be accessed through group communication. In this paper, we propose a solution for securing this process by preventing IoT endpoints from advertising “fake” resources. We consider group communication using the constrained application protocol (CoAP), and we leverage Web of Things (WoT) Thing Description (TD) to enable resources’ advertisement. In order to achieve our goal, we are using linked-data proofs. Additionally, we evaluate the application of zero-knowledge proofs (ZKPs) for hiding certain properties of a WoT-TD file.


Jurnal Common ◽  
2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Rismawaty Rismawaty ◽  
Sofie Aulia Rahmah

Penelitian ini dilakukan untuk mengetahui proses komunikasi kelompok dalam metode pembelajaran sentra di TK Zaid bin Tsabit. Penelitian ini mendiskusikan tentang proses komunikasi kelompok. Metode penelitian yang digunakan dalam penelitian ini adalah Metode Kualitatif dengan pendekatan Deskriptif. Teknik pengumpulan data yang dilakukan peneliti ada dengan studi pustaka, penelusuran data secara online, wawancara, observasi serta dokumentasi dengan 3 orang informan kunci yaitu guru di TK Zaid bin Tsabit serta 3 informan pendukung yaitu Kepala TK Zaid bin Tsabit dan 2 orang tua murid. Uji keabsahan data dengan peningkatan ketekunan, triangulasi dan diskusi dengan teman sejawat, teknik analisis data menggunakan pengumpulan data, reduksi data, penyajian data, penarikan kesimpulan dan evaluasi.Hasil penelitian ini bahwa Proses komunikasi yang terjadi merupakan komunikasi langsung yang terjadi dua arah dan dilakukan terus menerus untuk membentuk kemandirian anak. Proses komunikasi yang terjadi dalam kelompok metode pembelajaran sentra membentuk kemandirian anak. Proses komunikasi yang dilakukan oleh guru kepada anak dilakukan dengan memberikan arahan-arahan kepada anak serta contoh dari arahan yang telah disampaikan oleh guru.Kesimpulan pada penelitian ini adalah metode pembelajaran sentra membentuk kemandirian anak lewat komunikasi yang dilakukan guru secara terus menerus, karna melalui pembelajaran sentra anak diminta untuk melakukan segala sesuatunya sendiri dalam pengawasan guru. Saran yang diberikan adalah guru harus lebih kreatif dalam memberikan materi pada metode pembelajaran sentra serta bersikap lebih tegas dalam mendidik anak dan melakukan komunikasi yang berkelanjutan dengan orang tua murid. --------------------------------------------------------------------------------- This study was conducted to determine the process of group communication in the center learning method at TK Zaid bin Tsabit. This study discusses the process of group communication. The research method used in this study is a qualitative method with a descriptive approach. The data collection techniques carried out by the researcher were with literature studies, online data searches, interviews, observation and documentation with 3 key informants namely the teacher at TK Zaid bin Tsabit and 3 supporting informants namely TK Head Zaid bin Tsabit and 2 parents. Test the validity of data by increasing perseverance, triangulation and discussion with colleagues, data analysis techniques using data collection, data reduction, data presentation, drawing conclusions and evaluations.The results of this study that the communication process that occurs is direct communication that occurs in two directions and carried out continuously to form the independence of children. The communication process that occurs in a group of central learning methods shapes children's independence. The process of communication carried out by the teacher to the child is done by giving directions to the child as well as examples of directions that have been delivered by the teacher.The conclusion of this study is that the central learning method shapes children's independence through continuous communication by the teacher, because through central learning children are asked to do everything themselves in the supervision of the teacher. The advice given is that the teacher must be more creative in giving material to the central learning method and be more assertive in educating children and making ongoing communication with parents.


2020 ◽  
Author(s):  
Jing Liu ◽  
Hong Shan ◽  
Changli Tu ◽  
Meizhu Chen ◽  
Xiujuan Qu ◽  
...  

UNSTRUCTURED Background: Since December 2019, Coronavirus Disease 2019 (COVID-19) emerged in Wuhan city and rapidly spread throughout China. Facing this kind of public health emergency, an efficient, fast and group communication method is needed. Method: As a director of the department Pulmonary and Critical Care Medicine in a tertiary hospitals, which is the only designated one for diagnosis and treatment of COVID-19 in a medium-sized city, I analyzed and summarized the “group function” of WeChat (Weixin, micro-message) App in working about COVID-19. Results: By February 16, 2020, we have completed 1,526 citywide consultations and treatment of 322 inpatients, including 97 patients diagnosed with COVID-19, with the help of 12 WeChat groups by handy. The advantages of WeChat group are as follows: 1. Work efficiency can be improved greatly, saving labor costs. 2. Accurate and intuitive information can be gotten fast and timely, avoiding close contacting with COVID-19 patients. 3. Data and message in WeChat groups can be saved, arranged and reviewed at any time. Conclusions: The “group function” in WeChat App plays a greater role in the public health emergent work about management, diagnosis and treatment of COVID-19.


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