Judul: Improving The Red Mud Quality Of Bauxite Mining Waste As Growing Media By Application Of Coal Bottom Ash And Humic Materials
Abstrak: Bauxite is an aluminium sourced mineral. Red mud is a waste product from that process. The waste was generated from two processes, that is washing process that separate the ore from its impurities and bauxite into qualified aluminium process. The research aims to improve the utility of red mud from washing process as a growing media by ameliorants. The ameliorants used are coal bottom ash and liquid humic materials. The research was purposed to identify the chemical characteristics of red mud before and after ameliorants application, and their effect on Gmelina (Gmelina arborea roxb.) growth. This research was conducted in a greenhouse and designed with two factors: coal bottom ash with levels of 0; 80; and 160g/2kg red mud and liquid humic materials with levels of 0; 0.05; and 0.1ml/2kg red mud with three times replications. The result showed that the red mud used in this study have low levels of fertility and nutrient content. The application of coal bottom ash and liquid humic materials significantly increases the pH, levels of P2O5 available, exchangeable Ca, Mg, and cation exchange capacity (CEC). Overall H0A2 treatment with level of coal bottom ash as much as 160 tons/ha without liquid humic materials is the most efficient level to improve the chemical properties of red mud.
Keyword: Bauxite, coal bottom ash, Gmelina arborea roxb, humic materials, red mud

Judul: Pemanfaatan bahan humat dan abu terbang untuk reklamasi lahan bekas tambang
Abstrak: Open pit coal mining activities consist of land clearing, removal and placement of top soil, removal and dumping of overburden, and coal getting. Those activities have some impact on landscape changes and degradation of soil. Therefore, reclamation of ex-mining area is needed to improve post mining land become a stable and productive land. Impact of open pit coal mining generally are decreasing of soil characteristics such as declining of soil pH, soil nutrients, and soil organic matter. Improvement of the soil can be done by application of soil amendments. One of alternatives for soil amendment that available in the field is fly ash. Having high pH and nutrients, fly ash can be used to increase soil pH and source of soil nutrients. However most of K, Na, Ca and Mg in fly ash are still bounded in oxide bonding. Humic subtances may be used for increasing of the release of nutrients in fly ash. Humic subtances have polyelectrolite macromolecules such as carboxyl and OH-fenolic that can stimulate for releasing nutrients in fly ash. The objectives of this research are studying influence of humic subtances and fly ash on plant growth, absorption of the plant, and soil chemical characteristics. This research was conducted on February to July 2009 in nursery and post mining land at Sangatta Region, PT Kaltim Prima Coal, East Kutai Regency, East Kalimantan. The experiment was conducted in two locations i.e. first experiment in nursery area using Completely Randomize Design with 2 factors; humic subtances dosages (0,00; 0,075; and 0,15 ml/polybag) and fly ash dosages (0; 200; dan 400 g/polybag). Albazia falcataria and Shorea parvifolia Dyer are use as indicator plants. Second experiment was conducted in post mining area using Group Randomize Design with 2 factors, humic subtances dosages (0,000; 0,9375; and 1,875 ml/plant) and fly ash dosages (0,0; 2,5; and 5,0 kg/measurement plot). The plants were planted in three slopes i.e. upper slope, middle slope, and foot slope. The growth and production of plants were measured. Plant analysis was also conducted to evaluate the effect of soil amendments on plant absorption. The soil analysis covers pH, organic matter, N, P-Bray I, exchangeable bases of Ca, Mg, K, Na, exchangeable Al and CEC. The results showed that humic subtances increase the CEC and organic matter of soil while fly ash increases the pH, P and exchangeable bases. Humic subtances and fly ash increase the growth of Albazia falcataria relatively quick than that of Shorea parvifolia Dyer. Humic subtances and fly ash increase the absorption of Ca and Mg by plants. There is a positive correlation between increasing soil nutrients and plant growth as well as plant absorption
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Judul: Intrusion Detection System Untuk Pendeteksian Serangan Synflood Pada Protokol TCP/IP
Abstrak: Network Intrusion Detection System (NIDS) adalah pcnycdia pcrlindungan terhadap sistem jaringan komputer sclain dari mekanisme pcrlindungan yang telall diimplementasikan sebelumnya. Firewall scbagai salah satu alternatif pcrlindungan sistem jaringan memiliki kelemahan, yaitu hanya mampu mendcteksi paket data yang keluar dan masuk sistem jaringan yang ingin dilindungi. Pendekatan yang dilakukan oleh IDS adalah dengan melakukan proses audit terhadap segala aktivitas jaringan yang akan dilindungi. Dalam prakteknya, kejadian dalam sistem dinyatakan sebagai seknens dari pakel data yang melintasi atau memiliki tujuan ke sistem jaringan yang akan dilindungi. Penelitian ini mengenali pola serangan SYNflood untuk menentukanfinite state machine yang dapai dipergunakan dalam proses pcndeteksian.
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