Judul: Profil panggilan jaringan pintar PT.Telkom
Abstrak: Semakin banyak pelanggan telepon menghubungi nomor telepon Jaringan Pintar (Japati) menyebabkan terjadinya kesibukan panggilan telepon. Kesibukan panggilan telepon memungkinkan banyaknya panggilan yang tidak tersambung atau tidak terjawab. Hal ini akan mempengaruhi nilai Answer Seizure Ratio (ASR) sehingga terjadinya kesibukan panggilan telepon perlu diantisipasi untuk mengendalikan nilai ASR. Penelitian ini bertujuan untuk menentukan hari sibuk panggilan Japati dan mengetahui jenis panggilan yang mempengaruhi nilai ASR panggilan Japati di masing-masing divisi regional. Pada bulan Agustus 1998 terjadi 360122 bid dengan nilai ASR mencapai rata-rata 50.84 %. Bari sibuk panggilan Japati terjadi pada hari Kamis, sedangkan jam sibuk terjadi pada sore hari. Jenis panggilan yang mempengaruhi nilai ASR adalah answered call. Divisi regional 5 Jawa Timur mempunyai proporsi answered call yang besar dibanding divisi regional yang lain sehingga nilai ASR-nya lebih tinggi dibanding divisi regional lainnya. Call di sirkit panggilan Japati kurang efektif, terutarna pada divisi regional 2 Jakarta. Untuk meminimumkan biaya operasi jumlah sirkit yang diaktifkan perlu disesuaikan dengan banyaknya panggilan Japati yang terjadi.
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Judul: Pengaruh Curah Hujan terhadap Gangguan Jaringan PT. Telkom Bogor
Abstrak: Communication using telecommunication may be exposed to disturbance such as connection interruption, disconnection, etc. Climate is considered as one factor affecting these conditions. Too much rainfall may lead to floods that inundate telephone network and finally damage the network. However, the climatic factor has not been taken much into consideration by the telecommunication companies in designing network system. This study aims to assess the relationship between rainfall and level of disturbance of the telecommunication services. This study assessed three types of services, namely PSTN (home telephone), TDSL (internet services), and ISDN (digital services). There were 31 types of disturbances being assessed in the three services. The data of disturbance was collected on daily basis from 2007 to 2008. This study used principal component analysis (PCA) to reduce the number of disturbances into a number of principal components explaining most of the disturbances types. This study found that type of disturbance which frequently occurred was ‘no connecting tone’ (81.4%). Type of telecommunication services being disturbed mostly is PSTN. Types of disturbance can be seen from the factors causing the disturbance and location where disturbance factors occurred. Based on the disturbance factors, corrosion was the most common factor causing the disturbance (38.9%) and based on the location, dropwire was the most common one (35.7%). The analysis suggested that rainfall variability has significant relationship only with certain types of disturbances. At Cibinong, rainfall significantly affected the telecommunication services through its effects on 'network maintenance', 'dashed voice' and 'arrears'. At Dayeuh, rainfall significantly affected the services through its effect on 'SLI disconnection'. At Citeko, rainfall significantly affected the telecommunication services through its effects on 'MMA interruption', 'internet access error', 'browsing error', 'can't be called', 'bell error', 'no connecting tone', 'dashed voice' and 'mussy wiring'. At Jasinga, rainfall significantly didn't affect to any types of network interruption. At Bogor, rainfall significantly affected the telecommunication services through its effects on 'MMA interruption', 'internet access error', 'PCM interruption', 'browsing error', 'can't be called', 'bell error', 'no connecting tone', 'there were connecting tone but no answer', 'dashed voice', and 'mussy wiring'. Based on this study, it is recommended that the PT. Telkom Bogor may need to consider rainfall in designing the wire system particularly outdoor wire. Types of wire for outdoor should be high quality and anti-corrosion. To improve this study, it is recommended to include relative humidity and extreme climate as other climatic factors causing the disturbance.
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Judul: Transesterlflkasl Minyak Goreng Bekas untuk Produksi  Metll Ester
Abstrak: The increasingly public awareness about food safety on used frying oil and the increasingly serious environmental destruction have made biodiesel from used frying oil to become an alternative fuel for replacing diesel fuel position in most conventional diesel engines. Transesterification of used frying oil with methanol, in the presence of 1% sodium , hydroxide catalyst (base on weight of oil) was applied in this work.
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