http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Traditional forest conservation knowledge/technologies in the Cordillera, Northern Philippines
Camacho, Leni D.,Combalicer, Marilyn S.,Yeo-Chang, Youn,Combalicer, Edwin A.,Carandang, Antonio P.,Camacho, Sofronio C.,de Luna, Catherine C.,Rebugio, Lucrecio L. Elsevier 2012 FOREST POLICY AND ECONOMICS Vol.22 No.-
( Leni D Camacho ),( Antonio P Carandang ),( Marilyn S Combalicer ),( Sofronio C Camacho ),( Dixon T Gevana ),( Yeo Chang Youn ) 한국산림경제학회 2011 산림경제연구 Vol.18 No.1
Opportunity costs incurred in devoting the areas of MFR to agroforestry, grassland and timber production and combinations of them as well as the willingness to accept incentives of farmers to promote conservation were evaluated using the Net Present Value approach and contingent valuation. The main goal of the study is to determine the economic implications of different management options in the Makiling Forest Reserve (MFR) in the Philippines. Economic linkages between the local people and the conservation program in the area were also assessed. In this study, it was found that the analysis of the different options for MFR indicates that the conservation of remaining natural forests in tandem with agroforestry in all open areas yielded the highest strewn of benefits. Therefore, appropriate strategies that would further integrate local economic concerns in agroforestry and natural forest conservation arc necessary. It is recommended that the local people and the government seek optimal management opportunities in the conservation of MFR by partnering in the further development, restoration, and protection of the reserve.
Tree biomass and carbon stock of a community-managed mangrove forest in Bohol, Philippines
Leni D. Camacho,Dixon T. Gevana,Antonio P. Carandang,Sofronio C. Camacho,Edwin A. Combalicer,Lucrecio L. Rebugio,윤여창 한국산림과학회 2011 Forest Science And Technology Vol.7 No.4
Mangrove plays a significant role in climate change mitigation particularly in carbon absorption and minimizing the detrimental impacts of sea level rise, salt-water intrusion and tidal surges. In Bohol Province, Philippines, a small coastal island community known as Banacon is one of the successful cases in mangrove reforestation. Recognizing the site’s potential for a carbon sequestration project, a biomass and carbon stock assessment of mangrove trees was done. Using standard sampling techniques and allometric equations, tree carbon storage was measured across stand ages, namely 15-, 20- and 40-year-old plantations. Mature natural stands were also included in the assessment. By estimate, the 40-year-old plantation has the largest carbon density with 370.7 ton ha71, followed by the 15-year-old plantation with 208.5 ton ha71, 20-year-old plantation with 149.5 ton ha71, and lastly by natural stand with 145.6 ton ha71. Overall, Banacon mangroves are in a vigorous condition of storing vast amount of carbon. Local community and government should therefore sustain their commitment in coastal reforestation activities in order to enhance the mangrove carbon stocks. Policies and programs that can help provide incentives and livelihoods to local people who are largely dependent on mangroves should likewise be explored in order to sustainably reap the economic and ecological benefits of conserving mangrove forest.
SOME PROPERTIES OF EVOLUTION ALGEBRAS
Camacho, L.M.,Gomez, J.R.,Omirov, B.A.,Turdibaev, R.M. Korean Mathematical Society 2013 대한수학회보 Vol.50 No.5
The paper is devoted to the study of finite dimensional complex evolution algebras. The class of evolution algebras isomorphic to evolution algebras with Jordan form matrices is described. For finite dimensional complex evolution algebras the criterium of nilpotency is established in terms of the properties of corresponding matrices. Moreover, it is proved that for nilpotent $n$-dimensional complex evolution algebras the possible maximal nilpotency index is $1+2^{n-1}$.
Colourings and the Alexander Polynomial
Camacho, Luis,Dionisio, Francisco Miguel,Picken, Roger Department of Mathematics 2016 Kyungpook mathematical journal Vol.56 No.3
Using a combination of calculational and theoretical approaches, we establish results that relate two knot invariants, the Alexander polynomial, and the number of quandle colourings using any finite linear Alexander quandle. Given such a quandle, specified by two coprime integers n and m, the number of colourings of a knot diagram is given by counting the solutions of a matrix equation of the form AX = 0 mod n, where A is the m-dependent colouring matrix. We devised an algorithm to reduce A to echelon form, and applied this to the colouring matrices for all prime knots with up to 10 crossings, finding just three distinct reduced types. For two of these types, both upper triangular, we found general formulae for the number of colourings. This enables us to prove that in some cases the number of such quandle colourings cannot distinguish knots with the same Alexander polynomial, whilst in other cases knots with the same Alexander polynomial can be distinguished by colourings with a specific quandle. When two knots have different Alexander polynomials, and their reduced colouring matrices are upper triangular, we find a specific quandle for which we prove that it distinguishes them by colourings.