Judul: Community perceptions, attitudes and behavior towards river water: a case in the Kaligarang watershed, Central Java
Abstrak: Seringkali terdapat ketidak-konsistenan antara sikap dengan perilaku masyarakat terhadap lingkungan. Sikap yang baik terhadap lingkungan tidak selalu diikuti perilaku yang baik. Akan tetapi belum banyak diketahui faktor penyebabnya Secara teoritis hubungan antara sikap dengan perilaku memang dapat dibatasi oleh berbagai keadaan dan obyeknya. Oleh karena itu diperlukan model kon- septual yang dapat menjelaskan hubungan amara sikap dengan perilaku terhadap lingkungan, dengan mengidentifikasi faktor-faktor yang dapat membatasi hubungan antara keduanya Program Kali Bersih diakui oleh pemerintah belum manhikan hasil nyata dalam mening- katkan kualitas air sungai sebagai salah satu sasaranya. Secara teoritis keadaan itu dapat ber- hubungan dengan persepsi, sikap, dan partisipasi masyarakat terhadap program Persepsi, sikap, dan partisipasi yang baik dari masyaraka akan meminjang keberhasilan program. Melalui penelitian ini telah disusum suatu model konseptual mengenai hubungan antara per- sepsi, sikap, dan perilaku masyarakat terhadap air sungai. Model mempertikaikan adanya sejumlah pe- ubah yang dapat secara langsung mempengaruhi perilaku masyarakat terhadap air sungai dan banya mempengaruhi perilaku yang dimaksud, sehingga berlaku sebagai "peubah antara" yang dapat mapangani konsistensi hubungan antara sikap dengan perilaku yang dimaksud. Peubah-peubah itu yang utama adalah pandangan masyarakat mengenai konsekuensi dari perilaku tertentu terhadap air sungai, pandangan masyarakat mengenai perilaku parutannya terhadap air sungai, motivasi, dan ke- biasaan hidup masyarakat. Melalui penelitian ini juga telah disian model konseptual mengenai hubungan antara per- sepsi, sikap, dan partisipasi masyarakat dalam pengelolaan kualitas air sumgai. Model ini memperti hatkan adanya sejumlah peubah yang dapat secara langsung mempengaruhi dan hanya mempengaruhi partisipasi masyarakat sehingga dapat membatasi hubungan antara sikap dengan partisipasi yang dimaksud. Peubah poubah itu antara lain adalah pandangan masyarakat mengenai konsekuensi yang akan mereka terima jika berpartisipasi atau tidak berpartisipasi, dan motivasi mereka Model yang sama juga telah disusun untuk persepsi, sikap, dan kesediaan masyarakat untuk membayar perbaikan kualitas air sungai. Model mounjukkan bahwa motivasi dapat menjadi "peubah antara" yang mempengaruhi konsistensi hubungan antara sikap dengan kesediaan masyarakat untuk membayar perbaikan kualitas air sungai., Toward the enviromnent. Good attitude-is often not accompanied by actual actions in maintaining the environment, the-causing factors have not been nruch known yer.. Theoretically, various situations and :the environmental objects themselves can restrict the relationship between the .attitude and behavi9r towards the environment. It is, the.-efore, necessary to have a conceptual model to explain the relationship between the attitude and behavior mentioned before, by identifying the factors that may restrict the relationship. The government has admitted that the Clean River Program has not given any significant .result yet in increasing the quality of the river water as one of its aim. It can be theoretically accepted that this may be due to perception, attitude and participation of the community in the program. Good perception, antitude and participation of the community will unquestionably support the success of the program. By means of this research, a conceptual model has been set up on the relationship between perception, anitude and behavior of the community towards river water. This model shows a number of variables that can directly affect the behavior towards river water so that it can also affect the consistency of relationship between attitude and behavior towards river water
Keyword: Perception, Attitude, Community behavior, Water quality management, behavior, willingness to pay

Judul: Penifaian Jasa Lingkungan Air Minum dan Penentuen Prioriias Bantuan Perbaikan Lingkungan (Studi Kasus DAS Citarum, Jawa Barat)
Abstrak: Willingness of community at Citarum watershed to partidpate in improving environmental quality as an effort to reduce impact of dimate change was assessed based on their willingness to pay to environmentd sewices provided by upper watershed communities. Identification of activities that would reduce the involvement of upstream communities to do deforestation and assessment, of vulnerability of downstream communities to climate change was carried out through survey to. household. The illingness to pay was analyzed using Contingent Valuation Methd (CVM) and priority pwmm was analyzed using Analytical Hierarki Process (AHP). Based on CVM analysis it was indicated that the level of willingness of downstream communities to pay the compensation for the environmental sewices (0.g. drinking water) provided by upstream communities depended on their perception and understanding about the important of maintaining forest cover at the upper Citafum watershed and availability of drinking water. If the downstream communities living in the uhan areas often exposed to clean water scarcity problem during dry-season, their willingness to pay for the compensation tended to inmase. Further analysis found that the main factors that motivate mmuniiy to do deforestation at Upper Cirum watershed were to seek new land for agricutture activities and to increase their income. Majority of communities wanted to stop destructing the forest if they have alternative jobs for income generation.
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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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