Judul: Evaluation of Thermal Comfort and Supporting  Facilities for Visitor Comfort at Anggrek Park Gelora Senayan
Abstrak: Jakarta Pusat adalah salah satu kota yang memiliki ruang terbuka hijau yang cukup banyak. Taman Anggrek Gelora Senayan adalah salah satu ruang terbuka hijau publik yang termasuk dalam kategori taman kota. Taman kota yang baik adalah taman kota yang dapat memberikan kenyamanan bagi pengunjung taman tersebut. Tujuan penelitian ini adalah mengevaluasi tingkat kenyamanan termal, mengidentifikasi dan mengevaluasi fasilitas penunjang kenyamanan ,dan mengusulkan rekomendasi untuk meningkatkan kenyamanan pengunjung. Metode penelitian menggunakan perhitungan Thermal Humidity Index (THI) dan Importance Performance Analysis (IPA) serta menyebarkan kuesioner penelitian di lokasi penelitian. Hasil penelitian menunjukkan bahwa perhitungan THI di lokasi penelitian ini termasuk kategori tidak nyaman. Sedangkan berdasarkan hasil perhitungan IPA, kenyamanan fasilitas di taman ini sudah cukup baik namun perlu ada perbaikan dan perawatan yang lebih intensif untuk beberapa fasilitas. Sedangkan, hasil kuesioner yang diberikan kepada pengunjung, parameter kenyamanan termal masih tergolong kurang dan kenyamanan fasilitas dari segi kinerja cukup baik, tapi ada beberapa fasilitas yang kinerjanya kurang baik namun keberadaanya menurut pengunjung taman penting., Central Jakarta is a city that has quite a lot of green open space. Gelora Senayan Anggrek Park is a public green open space that is included in the city park category. A good city park is a city park that can provide comfort for visitors to the park. The aim of this research is to evaluate the level of thermal comfort, identify and evaluate comfort supporting facilities, and propose recommendations to improve visitor comfort. The research method uses Thermal Humidity Index (THI) and Importance Performance Analysis (IPA) calculations and distributes research questionnaires at the research location. The research results show that the THI calculation at this research location is in the uncomfortable category. Meanwhile, based on the results of IPA calculations, the comfort of the facilities in this park is quite good, but repairs and more intensive maintenance are needed for some facilities. Meanwhile, according to the results of the questionnaire given to visitors, the thermal comfort parameters are still considered poor and the comfort of the facilities in terms of performance is quite good, but there are several facilities whose performance is not good, but according to park visitors their existence is important.
Keyword: City Park, Evaluation, Thermal Comfort, Supporting facilities

Judul: Evaluation of Thermal Comfort and Aesthetic of Three Parks in Depok City in the New Normal Era.
Abstrak: Kondisi Taman Kota Depok menjadi kurang terawat sejak terjadi pandemi covid-19 akibat pembatasan jumlah pengunjung. Di sisi lain, taman yang nyaman dapat meningkatkan kesehatan. Penelitian ini bertujuan mengidentifikasi kondisi eksisting, menganalisis kenyamanan termal dan estetika di Taman Lembah Gurame, Taman Lembah Mawar, dan Taman Merdeka berdasarkan persepsi dan preferensi. Evaluasi kenyamanan termal dilakukan melalui analisis Thermal Humidity Index (THI), sedangkan evaluasi estetika taman dilakukan dengan metode Scenic Beauty Estimation (SBE). Adapun analisis persepsi dan preferensi responden dilakukan dengan metode analisis statistik deskriptif. Hasil analisis THI ketiga taman termasuk tidak nyaman hingga sangat tidak nyaman. Hasil penilaian estetika Taman Lembah Gurame dan Taman Lembah Mawar termasuk kategori tinggi, namun Taman Merdeka termasuk kategori rendah. Hasil persepsi yang dipengaruhi oleh penataan vegetasi dan jenis aktivitas membuat pengunjung lebih toleran terhadap kondisi taman. Rekomendasi perbaikan fasilitas, penambahan tanaman berbunga dan pepohonan rindang agar lebih nyaman, indah, dan adaptif di era new normal., The condition of Depok City Park has become unmaintained since the covid-19 pandemic due to restrictions on the number of visitors. On the other hand, a comfortable park can improve health. This study aims to identify existing conditions and analyze thermal comfort and aesthetics in Taman Lembah Gurame, Taman Lembah Mawar, and Taman Merdeka based on perceptions and preferences. Evaluation of thermal comfort using Thermal Humidity Index (THI) analysis, while evaluation of landscape aesthetic using the Scenic Beauty Estimation (SBE) method. The perception and preference of respondents using descriptive statistical analysis methods. The THI analysis result showed that the thermal comfort of three city parks was classified as uncomfortable to very uncomfortable. The aesthetic assessment in Taman Lembah Gurame and Taman Lembah Mawar were categorized as highly aesthetic, while Taman Merdeka was categorized as lowly aesthetic. The differences in visitor perception analysis results are caused by planting design, layout, and activities in the park, making them more tolerant of city park conditions. Improving facilities and adding flowering plants and shady trees to make city parks more comfortable, beautiful, also adaptive in the new normal era.
Keyword: aesthetic, city park, microclimate, new normal era, vegetation function

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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