Judul: Kontestasi sains dengan pengetahuan lokal petani dalam pengelolaan lahan rawa pasang surut Kalimantan Selatan
Abstrak: Tidal swampland is a marginal land that has two main constraints if reclaimed as agricultural land. These constraints are the high level of acidity and deep flooding. Local farmers with their local knowledge has been successfully manage tidal swamp land to provide their food needs. Science and technology in agriculture through the green revolution has been developed with the aim to fulfill the government's food needs. The program is implemented through increasing agricultural production and business efficiency. Introduction of agricultural science and technology at the tidal swampland has also an extensive social impact, especially with regard to the existence of local knowledge of farmers in tidal swamp land management. Contestation process between science with local knowledge on tidal swampland affected by the tidal swampland system of biophysical and social systems. This study was aimed to analyze the existence of local knowledge in the management of tidal swampland when contestation with science that became basic of recent modern agriculture system. This research is a case study on tidal swampland types A, B, C, and D. Data was collected by triangulation methods through in-depth interviews, life history and secondary data obtained from reports and historical records. The results showed that the forms of owned farmers’ local knowledge on the tidal swampland include: 1) knowledge on rice cultivation; 2) knowledge on land management; 3) knowledge about the maintenance and land conservation; and 4) knowledge on farming equipment. Local knowledge is always a process of change and evolve depending on outside forces that exist. Local knowledge that evolution was mainly driven by contestation with the science that introduced in the farming systems in tidal swampland. In the contestation proces, just a few science in type A tidal swampland can be applied especially in high yielding variety. Local knowledge society about the local rice farming systems still exist, but social institutions have been dominated by the presence of farmers' groups (‘kelompok tani’) that the government introduced as a supporting institution in modern agricultural systems. In the tidal swampland types B, C and D occurred science dominance in the application of agricultural technology such as the use of chemical fertilizers, pesticides and lime for agriculture (‘dolomit’). So was the case with local institutions of farmers (‘handil’) has been replaced by institutional role of farmer groups. Form of hybridization that occured between science and local knowledge in the form of high yielding variety-local rice farming systems called 'sawit dupa' numerous in the tidal swampland type B. Social system response may take the form of receipt of science in their agricultural systems through of adjustment process in fitting together (coadaptation) or otherwise suffered rejection because of not correspond with the biophysical environments and social systems
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Judul: Model pengelolaan lahan rawa lebak berbasis sumberdaya lokal untuk pengembangan  Usahatani berkelanjutan  (studi kasus di Kecamatan Sungai Raya dan  Sungai Ambawang, Kabupaten Kubu Raya - Kalimantan Barat)
Abstrak: The exploitation of swamp land is still limited when compared to the cultivation of dry land or irrigated land. Some of the factors that make the exploitation of swamp area far from expectation and its yields not maximum, for example 1) the wrong perception of farmers that the farming they are doing now has given high income, 2) a lack of capital, 3) low technological access, 4) characteristics of farmer‘s subsistence, and 5) tradition-based farming. This study was aimed to formulate a resources-based swamp land development model to increase land productivity and farmer Income. This research was conducted in the Sub-District of Sungai Ambangah in the District of Sungai Raya, and the Sub-District of Pasak Piang in the District of Sungai Ambawang, in the Regency of Kubu Raya, West Kalimantan Province. The analysis of each crop cultivated in both Sungai Ambangah and Pasak Piang gave the following results respectively for both areas; (1) rice with the R/C ratio of 3,30 and 4,80; (2) rubber with B/C ratio of 1,23 and 24,35; and (3) palm with the B/C ratio of 1,52. These results, if linked to the value of Appropriate Living Needs (ALN) and the minimum land area (ML) that must be fulfilled, indicate that the farmers in Sungai Ambangah could reach only 26,92% of ALN and require a minimum land of about 3,15 hectares; whereas the farmers of Pasak Piang could meet 34,53% of ALN and need a minimum land of approximately 2,54 hectares. Further, the sustainability status for the five dimensions in the existing condition of Sungai Ambangah obtained the index value of 54,82% or the category of sustainable enough for the institutional dimension, while the other four dimensions got the value of less than 50,00%, or categorized as less sustainable. As for the village of Pasak Piang, it got the index value of 52,19% or the category of sustainable enough also for the institutional dimension, whereas the other four dimensions obtained the value of less than 50,00% or considered less sustainable. The model formulated from the results of this study is based on the available local resources in both research sites, a model of sustainable farm development on swamp lands (UTLRL). Conceptually, this is also called an integrated farming model, that is, by integrating crops and livestock. The recommended policies formulated from the results of this study include: (1) the pattern of farming and increased cropping index, (2) maintenance of livestock, (3) the provision of farm capital, (4) the availability of micro finance institutions, (5) the active role of agricultural extension agencies, (6) farmers and farmer groups, (7) support from research institutions and higher education, and (8) post-harvest management and marketing.
Keyword: West Kalimantan

Judul: Approximation of the Median of Poisson Distribution Using the Relation of Poisson-Gamma Distribution
Abstrak: A major drawback of median is that median cannot usually be defined in closed form, even in the cases where their distribution functions are known. This study gives an approximation of the closed form for the median of the Poisson distribution by using the relation of Poisson-Gamma distribution. The approximation uses elementary techniques based on the monotonicity of certain sequences involving tail probabilities of the Poisson distribution and the Central Limit Theorem. Furthermore, a closed form expression for the mean absolute deviation 􀜧|􀜰􀰒 􀵆 􀜯􀝁􀝀􁈺􀜰􀰒􁈻| is also studied. The median is relevant because of the fact that it minimizes the mean absolute deviation of a Poisson random variable (􀜰􀰒􁈻 by considering median as central tendency.
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