Judul: Kandungan Logam Berat Hg, Cd, Pb, dan Cu pada Ikan Bandeng Chanos chanos (Forsskal, 1775) di Perairan Bojonegara, Teluk Banten
Abstrak: Perairan Bojonegara sebagai bagian dari Teluk Banten, merupakan perairan yang mendapat pengaruh dari aktivitas industri, perkapalan, dan domestik. Aktivitas tersebut dapat menimbulkan pencemaran berupa logam berat. Penelitian ini bertujuan untuk menentukan tingkat akumulasi logam berat (Hg, Cd, Pb, dan Cu) pada daging ikan bandeng serta menentukan batas aman dalam mengkonsumsi ikan bandeng (Chanos chanos) di perairan Bojonegara, Teluk Banten. Pengambilan contoh ikan dan pengamatan perairan dilaksanakan dari bulan Agustus hingga Oktober 2020. Pengukuran kandungan logam berat pada daging ikan dilakukan dengan menggunakan AAS (Atomic Absorption Spectrophotometer). Kandungan logam berat Hg, Cd, dan Pb masih berada dibawah limit deteksi alat AAS dan masih berada di bawah baku mutu. Kandungan logam Cu pada ikan bandeng ukuran besar berkisar antara 2,87- 16,87 mg/kg, sedangkan ukuran kecil berkisar antara 0,273-0,481 mg/kg. Kandungan logam Cu pada ikan bandeng ukuran kecil masih berada di bawah baku mutu, sedangkan ikan bandeng ukuran besar telah melebihi baku mutu yang telah ditetapkan. Akumulasi logam Hg, Cd, dan Pb pada ikan bandeng tergolong akumulasi rendah, sedangkan akumulasi logam Cu tergolong akumulasi rendah hingga tinggi. Kandungan logam berat Hg, Cd, Pb, dan Cu terhadap ukuran ikan besar dan kecil tidak berbeda nyata., Bojonegara waters as part of Banten Bay, are waters that are affected by industrial, shipping and domestic activities. These activities can cause pollution in the form of heavy metals. This study aims to determine the level of accumulation of heavy metal (Hg, Cd, Pb, and Cu) in milkfish meat and determine the safe limit for consuming milkfish (Chanos chanos) in Bojonegara waters. Measurement of heavy metals content in fish meat was carried out using AAS (Atomic Absorption Spectrophotometer). The content of heavy metals Hg, Cd, and Pb is still below the detection of the AAS tool and is still below the quality standard. The content of Cu metal in large milkfish ranges from 2,87-16,87 mg/kg, while the small size ranges from 0,273-0,481 mg/kg .The content of Cu metal in small milkfish is still below the quality standard, while large milkfish has exceeded the established quality standard. The accumulation of Hg, Cd, and Pb in milkfish is classified as low accumulation, while the accumulation of Cu metal is classified as low to high accumulation. The content of heavy metals Hg, Cd, Pb, and Cu on the size of the large and small fish is not significantly different.
Keyword: Banten Bay, Bojonegara waters, heavy metals

Judul: Kandungan Logam Berat (Hg, Cd, Pb, dan Cu) pada Ikan Belanak Planiliza subviridis (Valenciennes, 1836) di Perairan Bojonegara, Teluk Banten
Abstrak: Keberadaan logam berat di perairan yang berlebih dapat mencemari lingkungan perairan serta organisme di dalamnya. Ikan belanak Planiliza subviridis (Valenciennes, 1836) dikenal sebagai ikan konsumsi. Penelitian ini bertujuan untuk menganalisis akumulasi logam berat (Hg, Cd, Pb, dan Cu) dalam daging ikan belanak di perairan Bojonegara, Teluk Banten. Penelitian dilakukan pada Agustus-Oktober 2020 dan Maret-April 2021. Analisis data terdiri atas analisis deskriptif dan kuantitatif. Hasil penelitian menunjukkan kandungan logam berat Hg, Cd, Pb, dan Cu berada di bawah baku mutu. Ikan belanak mengalami tingkat akumulasi sedang. Kondisi perairan Bojonegara masih dapat ditolerir dan masih layak untuk kehidupan ikan belanak. Ikan belanak di Teluk Banten masih aman untuk dikonsumsi dalam jumlah yang wajar., High presence of heavy metals in the waters can pollute the aquatic environment and the organisms. The greenback mullet Planiliza subviridis (Valenciennes, 1836) is known as consumption fish. This study aims to analyze the accumulation of heavy metals (Hg, Cd, Pb, and Cu) contained in the flesh of greenback mullet at Bojonegara Waters, Banten Bay. The research was conducted in August-October 2020 and March-April 2021. Data analysis consisted of descriptive and quantitative analysis. The results showed the heavy metal content (Hg, Cd, Pb, and Cu) was below the quality standard. The greenback mullets have experienced moderate accumulation rate. The condition of the waters of Bojonegara can still be tolerated and is still suitable for the life of mullet. The greenback mullet is still safe for consumption in a reasonable amount.
Keyword: Accumulation, Bojonegara, Heavy Metals, The Greenback Mullet

Judul: Pengembangan Aplikasi Pertukaran SMS Rahasia Berbasis Android Menggunakan Algoritme RSA
Abstrak: Delivering message using short message service (SMS) is very familiar among the users of cellular phone in Indonesia. SMS center (SMSC) is required to keep and deliver SMS from one device to another device. The weakness of SMS technology of is that the encryption only works between mobile station (MS) and base transceiver station (BTS). Meanwhile on the other side, it is fully opened without encryption so that some attacks such as hacking and modification become highly possible. This research utilized RSA algorithm to secure the delivery of SMS between one device and another. The advantage of RSA method is that it does not need to exchange secret key and it is able to keep the original content of SMS. It was found that RSA applications can be applied in order to guarantee the security of SMS contents.
Keyword: secret SMS, RSA, encrypt, decrypt, cryptography, Android