Judul: Sustainable Landscape Management Plan in Response to Climate Change at Situgunung Resort, Gunung Gede Pangrango National Park
Abstrak: Perubahan iklim berdampak pada seluruh bagian dunia. Indonesia terkena dampak perubahan iklim, bahkan di kawasan hutan yang dilindungi, termasuk taman nasional. Kondisi iklim mempengaruhi Resort Situgunung, Taman Nasional Gunung Gede Pangrango (TNGGP) yang menyebabkan penyusutan permukaan air secara drastis di Danau Situgunung. Fenomena ini terjadi disebabkan kemarau panjang dan minimnya pasokan sumber air danau sehingga berdampak buruk pada keutuhan ekosistem dalam kawasan, terancamnya habitat dan keragaman biodiversitas, serta terganggunya aktivitas masyarakat di desa penyangga. Penyesuaian pengelolaan lanskap adaptif perlu dilakukan untuk meningkatkan ketahanan iklim resort, mempertahankan fungsi dan manfaat kawasan taman nasional. Tujuan penelitian ini adalah menganalisis pengaruh perubahan iklim terhadap manajemen lanskap, menganalisis kondisi eksisting pengelolaan lanskap Resort Situgunung sebagai kawasan taman nasional dan upaya yang dilakukan untuk menghadapi perubahan iklim, serta menggunakan metode pengelolaan lanskap terpadu untuk mendukung adaptasi, mitigasi, dan peningkatan resiliensi perubahan iklim. Penelitian dilakukan pada bulan Juli hingga November 2023 di Resort Situgunung, TNGGP. Metode yang digunakan adalah pengumpulan data, analisis upaya pengendalian iklim, analisis pembandingan, analisis pemangku kepentingan, dan penyusunan rencana manajemen lanskap. Hasil penelitian berupa analisis curah hujan yang rendah selama 3 bulan berturut-turut dalam fenomena El Nino 2023, upaya pengendalian perubahan iklim yang dilakukan pengelola dalam 4 zona sesuai dengan sistem zonasi taman nasional, dan rencana manajemen lanskap berkelanjutan menggunakan metode pengelolaan lanskap terpadu yang didasari konsep solusi berbasis alam yang berfokus pada pengelolaan konservasi dan peningkatan jasa lanskap, pemulihan ekosistem, dan pengembangan sarana rekreasi berkelanjutan yang menerapkan nilai-nilai adaptasi, mitigasi dan peningkatan resiliensi perubahan iklim di kawasan Resort Situgunung., Climate change impacted the whole world. Indonesia is impacted by climate change, even in protected forest areas, including national parks. Climatic conditions affect Situgunung Resort, Gunung Gede Pangrango National Park which causes the shrinkage of Lake Situgunung. This phenomenon occurs due to long dry seasons and the lack of lake water supply, which has a negative impact on the integrity of the ecosystem in the area, endangering habitat and biodiversity, as well as disrupting community activities in buffer villages. Adaptive landscape management adjustments need to be made to increase climate resilience and maintain the functions and benefits of the national park. The aim of this research is to analyze the influence of climate change on landscape management, analyze the existing conditions of landscape management at Situgunung Resort as a national park area and the efforts made to deal with climate change, and use integrated landscape management methods to support climate adaptation, mitigation and resilience. The research was conducted from July to November 2023 at Situgunung Resort, Gunung Gede Pangrango National Park. The methods used are data collection, analysis of climate control efforts, benchmarking analysis, stakeholder analysis, and preparation of landscape management plans. The results of the research include the shrinkage of Lake Situgunung caused by low rainfall for 3 consecutive months during the El Nino phenomenon in the dry season, efforts to control climate change carried out by managers in 4 zones in accordance with the national park zoning system, and sustainable landscape management plans using the method Integrated landscape management based on the concept of nature based solutions that focuses on conservation management
Keyword: adaptasi, konservasi, mitigasi, pengelolaan lanskap terpadu, solusi berbasis alam, adaptation, conservation, integrated landscape management, nature-based solutions, mitigation

Judul: Performance of Management and Development Strategy of Natural Recreation of Situ Gunung, Gunung Gede Pangrango National Park
Abstrak: Management of natural recreation usually not equal yet with evaluation activities. Carrying out of Natural Recreation of Situ Gunung need evaluation in order to know how far satisfaction of visitor can be reached and brought into line with tourism activities in conservation area. This research aim is analysing management performance of natural recreation for gaining strategic alternatives of Situ Gunung Natural Recreation. The operationally research were bound on visitors satisfaction and on impact of tourism activities on social economic of communities and environment around the recreation place. The aspect on social economic of communities was observed from tourism impact and communities motivation on participating of recreation activities. Environmental aspect was observed from naturalism and preservation of the recreation area. Data analysis method consist of management performance analysis (descriptive analysis), visitors satisfaction analysis (Important – Performance Analysis/IPA and Customer Satisfaction Index/CSI) and Analysis of development alternatives (SWOT Analysis). Situ Gunung managed by two prominent institutions, i.e. Perum Perhutani and Bureau of Gunung Gede National Park. Man resources which behave are 4 employees of Situ Gunung Resort of Gunung Gede Pangrango National Park and 6 employees of Perum Perhutani. Access toward the location easily is reached by private vehicles or public transportation means. Situ Gunung Natural Recreation has 4 ultimate objects connected by roads that need repairing in some parts. The visitor backgrounds of dominant education are elementary school, occupations as student who came from inner side of Sukabumi itself, with recreation as arrival destination. The promotion of location is not effectively yet to these visitors. Visitor services form is recreation without tourist guide. There are in total 100 hectares area that intensively used as natural recreation activities, about 7 % area has been changed. Violation actions that probable can destroy resources are illegal logging/hunting although in small intensity. Visitors valuation of 16 attributes put into ‘SATISFACTORY’ category in CSI. It was identified 8 strengths and 8 weaknesses as internal factors and 8 opportunities and 5 threats as external environmental factors. Result of the SWOT analysis showed that Situ Gunung Nature Recreation lay in positive side of its internal and external factors with suggested development strategy is Strengths-Opportunities. The development programs that have been arranged are increasing level of promotion, spread out connection of cooperation, and using master plan of management. Performance of management of Situ Gunung Natural Recreation was counted into ‘GOOD’ category observed from visitor satisfactory aspect and from aspects of naturally, area preservation, and function rules of this region on social economic of communities. Development strategic alternative that has been arranged is Aggressive Growth Strategy (SO).
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Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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