朋友為成功社交生活不可或缺的一環。雖然保有舊有的朋友相當重要，但結識新的朋友更能為生活帶來新鮮感。在過去幾年，交友軟體（或稱：約會軟體）已經大幅度地改變了人們結識新朋友的行為。然而大部分的交友軟體的推薦機制大多仰賴地緣關係，而缺乏社群網絡上的資訊。但是，日常生活中最常見的交友方式便是透過朋友推薦及介紹。本篇論文首先對大眾進行了調查，了解「介紹朋友」的相關行為，並且實作一個利用現有朋友認識新朋友的交友軟體。

One can not have a successful social life without friends. While keeping in touch with old friends is essential, making new friends will certainly enrich one's social life. In the past few years, friend-making apps or dating apps have significantly changed the behaviors of meeting new people and making new friends. However, most of them mainly leverage on geospatial networking without much information from the existing social network of the app users. Friends lead to friends, one of the most natural way to make new friends is connecting with friends of existing friends. In this paper, we conducted a pilot survey on how people practice this “referring” behavior and further implement an application to validate the results.

1 Abstract................................ 2
2 Introduction.............................. 3
3 Mechanism .............................. 4
3.1 ProposedMatchingMechanism ................... 4
3.2 Hypothesis .............................. 5
3.2.1 Behaviors when making friends and interacting friends offline.............................. 5
3.2.2 Behaviors when making friends using MFBAC . . . . . . 6
4 PilotSurvey.............................. 8
4.1 DataSelection ............................ 8
4.2 Results................................. 9
4.2.1 Behaviors when making friends and interacting friends offline.............................. 9
4.2.2 Behaviors when making friends using MFBAC . . . . . . 11
5 Application .............................. 12
5.1 SystemDesign ............................ 12
5.1.1 Socialgraphbuilding..................... 12
5.1.2 Server-side technologies ................... 13
5.1.3 Client-side implementations................. 14
5.2 DataAnalysis............................. 14
6 RelatedWorks ............................ 15
6.1 MobileFriend-Making/DatingApps ................ 15
6.2 ReferringBehaviors ......................... 15
7 Conclusion .............................. 16

[1] Mohammad Shafkat Amin, Baoshi Yan, Sripad Sriram, Anmol Bhasin, and Christian Posse. Social referral: leveraging network connections to deliver recommendations. pages 273–276, 2012.
[2] Edmond Pui-Hang Choi, Janet Yuen-Ha Wong, Herman Hay-Ming Lo, Wendy Wong, Jasmine Hin-Man Chio, and Daniel Yee-Tak Fong. The impacts of using smartphone dating applications on sexual risk behaviours in college students in hong kong. PLoS one, 11(11):e0165394, 2016.
[3] Nicholas Epley and Juliana Schroeder. Mistakenly seeking solitude. Journal of Experimental Psychology: General, 143(5):1980, 2014.
[4] Jody Farnden, Ben Martini, and Kim-Kwang Raymond Choo. Privacy risks in mobile dating apps. arXiv preprint arXiv:1505.02906, 2015.
[5] Eric K Foster. Research on gossip: Taxonomy, methods, and future directions. Review of General Psychology, 8(2):78, 2004.
[6] Shana Green. Condoms aren’t on the menu: The sti and hpv implications of oral sex risk behaviors of partners meeting on apps and/or offline. In 143rd APHA Annual Meeting and Expo (Oct. 31-Nov. 4, 2015). APHA, 2015.
[7] Shana Green. Mutual friends make for risky hook-ups among young adults using a mobile dating app. In 2015 APHA Annual Meeting & Expo (Oct. 31-Nov. 4, 2015). APHA, 2015.
[8] Mitchell Hobbs, Stephen Owen, and Livia Gerber. Liquid love? dating apps, sex, relationships and the digital transformation of intimacy. Journal of Sociology, page 1440783316662718, 2016.
[9] Audun Jøsang, Tanja Ažderska, and Stephen Marsh. Trust transitivity and conditional belief reasoning. pages 68–83, 2012.
[10] Rensis Likert. A technique for the measurement of attitudes. Archives of psychology, 1932.
[11] Rachel Logan. Understanding perceptions of physical harm among young adults using a geospatial mobile dating app. In 2015 APHA Annual Meeting & Expo (Oct. 31-Nov. 4, 2015). APHA, 2015.
[12] Bryan Moll. Human resources marketing and recruiting: Essentials of employee referral. Handbook of Human Resources Management, pages 93–102, 2016.
[13] Giulia Ranzini and Christoph Lutz. It’s a match!: Exploring dating apps and the self-presentation of users. 2016.
[14] Aaron Smith and Maeve Duggan. Online dating & relationships. Pew Internet & American Life Project, 2013.
[15] Aaron Smith et al. Us smartphone use in 2015. Pew Research Center, 1, 2015.
[16] Daniel Wentzel, Torsten Tomczak, and Sven Henkel. Can friends also be- come customers? the impact of employee referral programs on referral likelihood. Journal of Service Research, 17(2):119–133, 2014.
[17] De-Nian Yang, Hui-Ju Hung, Wang-Chien Lee, and Wei Chen. Maximizing acceptance probability for active friending in online social networks. pages 713–721, 2013.