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Hasil Pencarian

Ditemukan 2 dokumen yang sesuai dengan query
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Engkos Achmad Kosasih
Abstrak :
This study is about the analysis of thermodynamic system of a refrigeration system with two condensers coupled in series to the electric air heater system. The condenser produces waste heat reaches 90oC and the heat is accumulated into a space heater up to 140oC. That means: the heater works only up to 50oC, so the temperature of the air is high and dry, but has a very low RCES (Ratio of Specific Energy Consumption) in dew point 20oC, which is indicate that the system is very significant.
Depok: Faculty of Engineering, Universitas Indonesia, 2016
UI-IJTECH 7:2 (2016)
Artikel Jurnal  Universitas Indonesia Library
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Zendri Setiawan Dasopang
Abstrak :

Nyamuk adalah vektor utama dari penyakit yang mengancam jiwa manusia seperti demam berdarah, chikungunya, demam kuning dan Zika. Dalam beberapa tahun terakhir terdapat metode pengendalian penyakit yang disebabkan vektor nyamuk selain penyemprotan pestisida, telah dikembangkan metode baru dengan melepaskan nyamuk pembawa bakteri Wolbachia ke lingkungan untuk menginfeksi populasi nyamuk liar sehingga dapat memutus penularan penyakit. Alternaltif lain yaitu dengan menggunakan biolarvasida untuk membunuh nyamuk. Biolarvasida berasal dari bahan - bahan alami yaitu tumbuhan (nabati) atau dengan pemanfaatan bakteri. Pada skripsi ini, dikonstruksi model pertumbuhan nyamuk dengan intervensi Wolbachia dan biolarvasida. Populasi nyamuk dibagi menjadi dua, yaitu populasi nyamuk yang terinfeksi Wolbachia dan populasi nyamuk sehat. Kajian analitik terkait proses non-dimensionalisasi, eksistensi dan kestabilan titik keseimbangan dilakukan terhadap model. Berdasarkan kajian analitis yang dilakukan, diperoleh empat buah titik keseimbangan yang dimiliki oleh model ini. Beberapa simulasi numerik dilakukan untuk mendukung hasil kajian analitik dan memberikan interpretasi secara visual, salah satunya yaitu simulasi autonomous untuk rasio antara laju kematian nyamuk terinfeksi dengan laju kematian nyamuk sehat (delta>1) menginterpretasikan mampu menurunkan jumlah kedua populasi nyamuk dan juga biolarvasida sehingga dapat berpengaruh besar dalam meminimalkan penyebaran penyakit.

 


Mosquitoes are primary vectors of life-threatening diseases such as dengue fever, chikungunya, yellow fever and Zika. In recent years there are methods of controlling diseases caused by mosquito vectors in addition to spraying pesticides, a new method has been developed by releasing mosquitoes carrying bacteria Wolbachia into the environment to infect wild mosquito populations so as to cut off transmission of disease. Another alternative is to use biolarvicide to kill mosquitoes. Biolarvicide comes from natural ingredients, namely plants (vegetable) or by the use of bacteria. In this thesis, a mosquito growth model is constructed with Wolbachia and biolarvicide intervention. Mosquito population is divided into two, namely infected mosquito population Wolbachia and healthy mosquito population. Analytical studies related to the non-dimensionalization process, the existence and stability of the equilibrium points were carried out on the model. Based on an analytical study that has been carried out, obtained four equilibrium points shown by this model. Some numerical simulations are given to support the results of analytic studies and provide visual interpretation. one of which is autonomous simulation for the ratio between the mortality rate of infected mosquitoes and the mortality rate for healthy mosquitoes (delta>1) interpreted as being able to reduce the number of populations of both mosquitoes and biolarvicides so that it can have a major effect on minimize the spread of disease.

 

Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2020
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UI - Skripsi Membership  Universitas Indonesia Library