Judul: Addiction of Internet Usage (Social Networking Sites) Among Digital Native on South Tangerang Commuter Train Line.
Abstrak: Internet usage has changed the lifestyle of humans in the last two decades. Aspects of change that occur include how to communicate, socialize, entertain, work, even think. There are being many positives associated with SNSs usages, such as establishing and maintaining relationships, yet there were also many negatives effects for some individuals. The quantitative and qualitative approach was used to collect the data, with a total of 153 respondents of Commuter Line users. Each participant filled out a questionnaire consisting of the Young’s Internet Addiction Test (IAT), along with general questions relating to internet usage (duration and SNSs). The results of this research suggest that younger respondents more recently acquaintance. There were 52.29% of respondents used the internet for more than 6 hours. The average IAT score was 52 points for males and 48.7 points for females. IAT score will be decreased along with growing age (p-value= 0.005). Internet addiction was increasing along with the longer duration of internet usage (p-value= 0.006). The most used SNSs are Instagram, Line, WhatsApp, YouTube, and sometimes added Facebook or Game. These findings suggest that there is an association between internet usage (SNSs) and addiction in Digital Native. Findings also highlight that younger users have more problems than older users.
Keyword: addiction, digital natives, Social Networking Sites (SNSs)

Judul: Addiction among Millennials of Internet Usage (Social Networking Sites) in Bandung, West Java
Abstrak: Background: Internet is one of the most powerful media of the 21st century and has revolutionized education and social communication. The internet (Social Networking Sites or SNSs) has a population of over seven million. Internet excessive usage can causes some problems, such as addiction and behavioral symptoms. Internet (SNSs) addiction is a major mental health problem in adolescents worldwide, particularly in Bandung, West Java. Objective: The aim of this research is to examine the relation between internet usage and internet addiction through Young’s Internet Addiction Test (IAT) in Millennials with a focus on Social Networking Sites (SNSs). Methods: Quantitative and qualitative approach were used to collect the data, with a total of 277 respondents in Bandung, West Java. Each participant filled out a questionnaire consisting of the Young’s Internet Addiction Test (IAT), along with general questions relating to internet usage (duration and SNSs). Result: The results of this research suggest that younger respondents more recently acquaintance (p-value = 0.001858). There were 50.20% respondents used internet more than 6 hours (0.4968). The average IAT score 58.61 point, 73.64% respondents had a moderate level of addiction. IAT score will be decreased along with growing age (p-value = 0.001685). Internet addiction was increasing along with the longer duration of internet usage (p-value = 1.252e-14). The most used SNSs are Instagram, Line, WhatsApp, YouTube, and sometimes added Facebook or Game. Conclusion: These findings suggest that there is an association between internet usage (SNSs) and addiction in Millennials. Findings also highlight that younger user have more ploblem than the older user. SNSs increased the internet addiction score and an addiction may lead to mental health problem also behavioral symptoms.
Keyword: internet usage, excessive usage, Social Networking Sites (SNSs), internet addiction, addiction, Millennials, Generation Y.

Judul: Hydrothermal Synthesis of Biphasic Calcium Posphate
Abstrak: Biphasio calsium phosphate (BCP), which was a mixture of hydroxypatite (HA) and tricalcium phosphate (TCP), was synthesized by hydrothermal method followed by sintering process. Hydroxyapatite was produced by using natural calcium source CaO from hen's eggshell and (NH4)2HPO4 as phosphate souce, other hydroxyapatite sample was produce by using synthetic calcium source Ca(OH) and H3PO4 as phosphate source.
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