Judul: . Rencana Penggunaan Lahan Untuk Komoditas Unggulan Berbasis Analisis Multi-Objective Land Allocation Di Kabupaten Cianjur
Abstrak: Pengembangan suatu wilayah hendaknya dilakukan dengan memberi konsentrasi yang lebih besar kepada sektor basis atau komoditas yang menjadi unggulan di wilayah tersebut. Kabupaten Cianjur memiliki potensi yang besar pada sektor pertanian, hal ini dapat dilihat dari share terhadap PDRB yang mencapai lebih dari 40%. Pengembangan sektor pertanian sangat bergantung kepada ketersediaan lahan yang sesuai bagi berbagai komoditasnya. Penggunaan lahan yang tidak mempertimbangkan aspek kesesuaian lahan akan menyebabkan terjadinya degradasi lingkungan sehingga bertentangan dengan prinsip pembangunan berkelanjutan (sustainable development) yang mensyaratkan terwujudnya lingkungan yang lestari sehingga tidak merugikan kepentingan generasi masa yang akan datang. Bagi sektor pertanian penggunaan lahan yang tidak sesuai dengan karakteristik yang dimiliki lahan disamping dapat merusak lingkungan juga akan menyebabkan menurunnya produktivitas dari tanaman tersebut, oleh karenanya diperlukan suatu mekanisme dalam mengalokasikan lahan untuk berbagai tujuan penggunaannya. Pengalokasian sumberdaya lahan untuk berbagai tujuan penggunaan hendaknya berdasarkan berbagai aspek pertimbangan sehingga diharapkan dapat memberi hasil yang optimal dari pemanfaatan suatu lahan. Tujuan penelitian: 1) Menentukan sektor / subsektor basis dan komoditas unggulan di Kabupaten Cianjur; 2) Menganalisis kesesuaian lahan untuk komoditas unggulan di Kabupaten Cianjur; 3) Menyusun arahan alokasi lahan untuk komoditas unggulan di Kabupaten Cianjur. Penelitian ini dilakukan di Kabupaten Cianjur dengan menggunakan data primer dan sekunder. Data primer diperoleh dari wawancara dan pengamatan lapang. Data sekunder diperoleh dari beberapa instansi terkait. Teknik analisis yang digunakan adalah; Location Quotient (LQ), Differential Shift (DS), Analisis Spasial (matching), AHP dan Multi-Objective Land Allocation (MOLA). Hasil penelitian menunjukkan bahwa pertanian merupakan sektor basis dengan indeks LQ sebesar 3.47, tanaman bahan makanan merupakan subsektor basis dengan indeks LQ sebesar 1.01. Sementara itu melalui analisis LQ dan DS diperoleh komoditas unggulan adalah kacang tanah, kedelai dan padi sawah. Sebagian besar lahan di Kabupaten Cianjur untuk padi sawah, kacang tanah, dan kedelai masuk ke dalam ordo tidak sesuai (N) yaitu sebesar 238,400 ha (67.94%), sisanya 112,478 ha (32.06%) masuk ke dalam ordo sesuai (S). Alokasi lahan untuk padi sawah seluas 58,566 ha tersebar di 32 kecamatan sebagian besar di Cianjur Utara dan Tengah, kacang tanah tersebar di 28 kecamatan mayoritas di Cianjur Selatan dengan luas seluruhnya 24,161 ha. Sementara kedelai tersebar di 23 kecamatan mayoritas berada di Cianjur Selatan dan Tengah dengan luas seluruhnya 14,420 ha.
Keyword: analisis kesesuaian lahan, komoditas unggulan, MOLA, sektor basis

Judul: Pemodelan Penggunaan Lahan untuk Permukiman di Kabupaten Cianjur
Abstrak: Cianjur regency is one of many regencies affected by the expansion of Jakarta and Bandung Metropolitan. Consequently, people are migrating to the cities caused an increasing population. It leads to experiencing uncontrolled advancement and arising problems. One of them is the raising land demand for settlement development, but the land is limited. Therefore, there is a need to address these particularities. This research aimed to model land utilization for settlement. To achieve the main aim, three specific objectives have arisen. First is identified land suitability for settlement. Second, delineated land availability for settlement. Third, allocated land for settlement based on demand. The methodology used is Multi-criteria evaluation (MCE) and geographical information system (GIS). They were collaborated to define the suitability class for settlement. The analytical hierarchy process (AHP) sets the criteria's weight using a pairwise comparison matrix. Overlapping the Land-use existing, Spatial plan or in Bahasa is Rencana Tata Ruang Wilayah (RTRW) and Sustainable food farm or in Bahasa is Lahan Pertanian Pangan Berkelanjutan (LP2B) were carried out to delineate the land available for settlement in 2030. In the end, a priority matrix has been built for allocating the demand of settlement. Two critical variables were considered in this stage: land suitability class and distance from the activity center. The AHP result showed that the most crucial consideration to define the land suitability class for settlement in Cianjur regency came from the disaster consideration. There are landslide and flood-risk. When the preferences between developers, academics, and government are separated, a different result is found. Developers think that the essential criterion is the accessibility consideration, especially distance to the nearest road. Meanwhile, academics and governments think that disaster consideration is the most important. Suitability classes for settlement in Cianjur Regency are: highly suitable (S1) 36%, suitable (S2) 7%, marginally suitable (S3) 44%, and not suitable (N) 14%. The land availability for settlement development decreases after implementing the Spatial plan and Sustainable food farm regulations. Land availability for settlement of Cianjur regency in 2030 is only 81 km2 or 2% of the total area. Allocation of the land demand for settlement focuses on two sub-districts in Cianjur regency: Sukaresmi and Agrabinta sub-districts. These two are representative of each cluster of the region. Sukaresmi presented Northern Cianjur, and Agrabinta presented the Southern of Cianjur. Allocation for settlement in 2030 in Sukaresmi will utilize the land with Priority one, Priority two, and Priority three for Business as usual (BAU), tradition protection, Market forces, and Horizontal expansion scenario. For Vertical expansion, it will utilize the land with Priority one and Priority two. The allocation of land demand for settlement in Agrabinta under Business, as usual, Market forces, and Horizontal expansion will use land with Priority one, two, and three. The Tradition protection will utilize land with Priority one and two, while the Vertical expansion scenario will only utilize the land with Priority one. This study gave an overview of the land suitability, availability, and the projected land for allocating the land for settlement based on five different scenarios. The marginally suitable class for settlement dominates Cianjur regency.
Keyword: land availability, land demand, land suitability, MCE, settlement

Judul: Comparison of HIV Model with and without Time Delay
Abstrak: Acquired immunodeficiency syndrome (AIDS) is the reduction of the human immune system. AIDS is caused by human immunodeficiency virus (HIV). No medicine has been found for this desease until recently. An AIDS therapy is usually performed with highly active antiretroviral therapy, namely reverse transcriptase inhibitors, protease inhibitors and combination of both. Various models have been developed to explain the immune system of patients with AIDS, namely the HIV, response and the time delay model. This paper discusses the comparison between the dynamics of the HIV virus, the dynamic response of protease inhibitors and dynamics of time delay. The dynamics model of HIV is influenced by the level of white blood cells produced and the rate of its death. Dynamics of protease inhibitors on the response and the time delay model is influenced by the death rate of infected white blood cells and the failure rate of treatment.
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