Judul: Addiction of Internet Usage (Social Networking Sites) Among Digital Native on South Tangerang Commuter Train Line
Abstrak: Penggunaan internet telah mengubah gaya hidup masyarakat pada dua dekade terakhir. Aspek yang berubah meliputi, cara berkomunikasi, bersosialisasi, hiburan, pekerjaan, hingga pola berfikir. Banyak dampak positif yang berkaitan dengan penggunaan media sosial, seperti menjalin hubungan, tetapi ada juga dampak negatif yang ditimbulkan. Cara pengumpulan data dilakukan dengan pendekatan kuantitatif dan kualitatif dengan total 153 responden. Setiap partisipan mengisi kuisioner yang berisi tes adiksi internet bersamaan dengan pertanyaan mengenai pemakaian internet dalam satu hari. Hasil dari penelitian ini menunjukkan bahwa responden yang lebih muda telah mengenal internet sejak dini dibandingkan dengan responden yang lebih tua. Sebesar 52.29% responden menggunakan internet lebih dari enam jam per hari. Rata-rata nilai adiksi internet sebesar 52 poin untuk pria dan 48.7 poin untuk wanita. Nilai adiksi internet menurun sepanjang pertambahan umur (p-value= 0.005). Nilai adiksi internet meningkat sepanjang durasi penggunaan internet per hari (p-value= 0.006). Media sosial yang paling banyak digunakan antara lain, Instagram, Line, Whatsapp, Youtube, Facebook, dan permainan. Penelitian ini menemukan adanya hubungan antara penggunaan internet dan adiksi pada masyarakat digital. Hasil dari penelitian ini juga menunjukkan bahwa pengguna yang lebih muda memiliki tingkat adiksi yang lebih tinggi dibanding responden yang lebih tua.
Keyword: adiksi, masyarakat digital, media sosial

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: Synthesis of Biphasic Calcium Phosphate Made of Eggshells Through A Hydrothermal Method
Abstrak: Biphasic Calcium Phosphate mixed of hydroxyapatite and tricalcium phosphate. A hydrothermal method of synthesizing by mixing CaO as calcium source and (NH4)2HPO4 as phosphate source with distilled water. CaO got from calcination process made of eggshells. All samples were synthesized using hydrothermal reactor then followed by sintering process. The molar ratio of Ca and P for all samples was 0.5 M : 0.3 M. Hydrothermal temperature and sintering temperature were variated they are 250 ºC, 300 ºC for hydrothermal and 800 ºC, 900 ºC, 1000 ºC for sintering, higher treatment temperature, tricalcium phosphate appears. Final results of synthesis were characterized by using X-ray Diffraction and Fourier Transform Infrared. X-ray Diffraction patterns was ecompared with database Join Committee on Powder Diffraction Standards and found tricalcium phosphate and hydoxyapatite.
Keyword: biphasic calcium phosphate, hydrothermal, hydroxyapatite, tricalcium phosphate