Judul: Pengaruh suhu udara terhadap perkembangan pradewasa lalat rumah (Musca domestica)
Abstrak: The house fly (Musca domestica) is an insect that often be found in human habitat and acts as a transmitter of disease. This study is laboratory observatory that aimed to analyze the relationship between temperature and the survival rate and developmental period of immature house flies. The survival rate and developmental period of immature house flies were observed at temperatures of 16 ºC, 27 ºC, 31 ºC, 39 ºC and the environmental temperature as a control temperature. The results of observation showed the lowest immature survival rates occur at 16 ºC and the highest at the environmental temperature (26.53 ºC). The relationship pattern of temperature and survival rate and the rate of immature developmental form a quadratic equation. The results of data analysis showed the optimum temperature for the immature survival rate and the rate of immature developmental are 28 ºC. The pattern of temperature changes effect on immature developmental period differ from those on survival rate. The increasing of temperature caused the decreasing of immature developmental period form an exponential equation
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Judul: Daya Tahan Hidup dan Periode Perkembangan Stadium Pradewasa Lalat Rumah Musca domestica (Diptera:Muscidae) Berdasarkan Tingkat Kelembaban Udara
Abstrak: Penelitian ini bertujuan untuk mengetahui gambaran pengaruh kelembaban udara terhadap daya tahan hidup lalat dan umur pradewasa lalat rumah. Data penelitian yang digunakan adalah data primer atau data pengamatan lapang dan data sekunder. Pengamatan dilakukan pada 3 tingkat kelembaban pada tiga tempat yang berbeda yaitu kelembaban tinggi (94%, 26.6°C), kelembaban sedang (83%, 27.7°C), dan kelembaban rendah (74%, 24.9°C). Hasil penelitian menunjukan bahwa pengaruh kelembaban maupun suhu sangat nyata pada siklus pradewasa (fase telur - kemunculan lalat) dan fase pupa. Pengaruh pada fase larva kurang nyata sedangkan fase telur tidak dipengaruhi kelembaban maupun suhu. Kelembaban tinggi akan mempengaruhi periode perkembangan semakin cepat. Informasi tekanan uap air aktual (ea) memberikan gambaran terbaik diantara pernyataan kelembaban udara lainnya dalam hubungan periode perkembangan pradewasa lalat rumah. Tekanan uap aktual (ea), suhu, maupun defisit tekanan uap (vpd) maksimum yang mendukung laju perkembangan pradewasa lalat optimum, adalah suhu 29°C, ea 37.5 mb, dan vpd 6.9 mb. Kondisi lingkungan termal yang nyaman dapat mempengaruhi populasi lalat. Periode perkembangan tercepat selama 5.9 hari pada THI 37.6 akan mempercepat waktu terjadi perkembangan pradewasa lalat. Presentase daya tahan hidup lalat rumah maksimum 37% saat THI 25.9….
Keyword: Survival rate, Longevity, Housefly, Vapor pressure, THI, Geophysics and meteorology, Cuaca, Pengaruh kelembaban, Suhu udara

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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