Judul: Studi Kelayakan Hutan Rakyat Dalam Skema Perdagangan Karbon (Studi Kasus Di Kawasan Hutan Rakyat Kampung Calobak, Desa Tamansari, Kecamatan Tamansari, Kabupaten Bogor, Provinsi Jawa Barat)
Abstrak: Climate change triggered by human activities that produce gases which having a greenhouse effect (Greenhouse Gas/GHG) if it accumulates in the atmosphere, thereby increasing the temperature of the earth's surface and usually called Global Warming. The rate of Indonesian forest destruction caused by deforestation and forest degradation contribute greatly to climate change and global warming. Development of Community Forest could be potential in carbon sequestration and then enter in Carbon Trading Scheme. Initiative to get the incentives for the management of Community Forests through carbon trading in the voluntary carbon market is a concrete step to participate in the adaptation and mitigation of climate change and gain maximum benefit from the ecosystem of the forest resources. So that, it is important to follow up the eligibility analysis of Community Forest in Indonesia to enter into carbon trading. Research conducted at the Community Forest Kampung Calobak, Tamansari Village, Tamansai District, Bogor Regency, Province of West Java during April-May 2010. This study uses content analysis and primary data taken consisted of community forest management conditions, written documents or conventions that can meet the certification scheme of forest resources in a field that requires The Certification Under Third Party Assessment Line C Scheme II PHBML-LEI and Plan Vivo Standards. Secondary data is physical condition, demographic and socio-economic community. The data collection will be done through a search of documents and other printed information resources as well as in-depth interviews as a form of direct communication between researcher and respondent, is also used to obtain primary data. Eligibility of forest certification scheme of kampung calobak to The Certification Under Third Party Assessment Line C Scheme II PHBML-LEI is GOOD Value > 25% x n = 25% x 32 = 8 indicators and FAIR > 50% x n = 50% x 32 = 16 indicators. Thus, based on guidelines LEI certification decision, the community forest management Calobak get the title of "DO NOT PASS". The cause of the lack of graduates, among others: (1) There is no valid data and information concerning any statement or agreement forest management group, (2) Currently there are no documents or information on Areal maps, conditions or profile in the management of human resources, (3) Lack of public knowledge about sustainable forest management, (4) The public and the Government has not understood about forest certification (benefits, importance, etc.). The assessment results of community forest in Calobak under the Plan Vivo Standards only able to meet the four indicators of the 37 indicators or data that should be available. The causes of the gap include: (1) The Local government and the public cannot find out information about carbon trading that can provide a direct incentive, (2) Local and regional market demand was still high. Thus, the factors that can inhibit the certification and carbon trade in community forest are: (a) Forest farmers lack knowledge about carbon trading and certification PHBML, (b) Constrained in the financing, (c) Management and institutional aspects that have not been steady. Meanwhile, factors which can stimulate interest in and signed in to perform certification and carbon trading are: (a)
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Judul: Analysis of Carbon Absorption Potential Development in The Community Forest of Karacak Village, Bogor Regency, West Java
Abstrak: Hutan rakyat merupakan salah satu alternatif yang perlu diketahui kemampuannya dalam menyerap dan menyimpan karbon karena dalam perencaannya melibatkan masyarakat yang menguasai pengetahuan alam di daerahnya. Penelitian ini bertujuan untuk mengetahui pola pengelolaan dan dugaan cadangan serta kemampuan serapan karbon yang dimiliki hutan rakyat di Desa Karacak. Pengambilan data dilakukan kepada 30 plot contoh yang dibagi berdasarkan kelas kemiringan lahan. Hasil inventarisasi menunjukkan hutan Desa Karacak termasuk dalam tipe hutan rakyat kebun campuran dengan 8 jenis pohon penghasil non-kayu dan 2 pohon jenis penghasil kayu. Hasil pengolahan data menunjukkan dugaan rata-rata kemampuan cadangan karbon terbagi dalam kemiringan landai 36,23 tonC/ha, kemiringan bergelombang 37,98 tonC/ha dan kemiringan berbukit 38,65 tonC/ha dengan total rata-rata 37,62 tonC/ha. Dugaan rata-rata kemampuan serap karbon dioksida terbagi dalam kemiringan landai 7,62 tonCO2/ha/tahun, kemiringan bergelombang 7,73 tonCO2/ha/tahun dan kemiringan berbukit 6,69 tonCO2/ha/tahun dengan total rata-rata 7,35 tonCO2/ha/tahun., Community forests are one of the alternatives that need to be recognized for their carbon sequestration and reserves capability, as their planning involves the local community which possesses indigenous knowledge of their natural environment. This research aims to determine the management pattern and estimate carbon sequestration, as well as reserves capabilities of community forest in Karacak Village. The data collection was implemented on 30 sample plots, categorized based on the slope class. The inventory results indicate that the forest in Karacak Village falls under the category of mixed garden community forests, comprising 8 types of non-timber-producing trees and 2 types of timber-producing trees. Data processing results reveal an estimated average carbon reserve capacity distributed as follows: for flat terrain, 36,23 tons C/ha; undulating terrain, 37,98 tons C/ha; and hilly terrain, 38,65 tons C/ha, with a total average of 37,62 tons C/ha. The estimated average carbon dioxide sequestration capacity is stratified as follows: for flat terrain, 7,62 tons CO2/ha/year; undulating terrain, 7,73 tons CO2/ha/year; and hilly terrain, 6,69 tons CO2/ha/year, with a total average of 7,35 tons CO2/ha/year.
Keyword: carbon dioxide absorption, carbon stock, community forest

Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix