Judul: Infestasi Pinjal dan Infeksi Dipylidium caninum pada Kucing Liar Di Kampus Institut Pertanian Bogor Dramaga
Abstrak: This study was conducted to investigate flea infestation and Dipylidium caninum infection on stray cat in Bogor Agricultural University Dramaga. The totals of 30 stray cats were collected from various places which found commonly in Bogor Agricultural University Dramaga. The stray cats were collected purposifelly which showed pruritus and alopecia. The whole body of cat powdered by gamexan powder, after that the fleas were collected by manual and examined microscopically. The D. caninum were examined from 30 fecal samples of stray cats used McMaster methode, flotation methode and observed by existence of proglotids. Fleas identification were conducted in Laboratory Entomology, while fecals were examined in Laboratory Helminthology, Faculty of Veterinary Medicine Bogor Agricultural University. The identification showed that was only one spesies of flea namely Ctenocephalides felis, while D. caninum were not found. Twenty one (70%) from thirty cats were infestated by the flea with density average of fleas per cat was 3.8±1.9.
Keyword: Ctenocephalides felis, Dipylidium caninum, Prevalence, Stray cat.

Judul: Studi Kasus Infestasi Pinjal Kucing (Ctenocephalides felis) pada Manusia di Desa Cangkurawok Kabupaten Bogor
Abstrak: This case study reports cat flea infestations (Ctenocephalides felis) in humans on October 2012. Fleas attacked five members of a family who lived in Cangkurawok village Bogor regency. Clinical disorders appeared only in three children, all of them suffered from severe itching after flea bites then led to a maculopapular rash on the site. Allergic reaction that occured was hypersensitivity due to flea bites (flea allergic dermatitis). Interview revealed the presence of stray cat in front of their home, one week before this case happened. Fleas were collected manually by using cloth or cotton that had been soaked with alcohol on the toe, hands, and neck being bitten. Microscopic identification confirmed that the flea is cat flea (C. felis). This finding indicates that humans could be accidental host for cat fleas which lose its natural host. Finally this result showed that fleas do not have specific host and could be residential pest.
Keyword: stray cat, flea allergic dermatitis, Ctenocephalides felis

Judul: Optimization of Thermal Efficiency of Organic Rankine Cycle  System (ORC) Using Working Fluid Variation based on Simulation
Abstrak: Sipahutar (2019) telah melakukan simulasi sistem Organic Rankine Cycle menggunakan software Cycle Tempo. Simulasi ini dilakukan untuk mengetahui peforma kerja sistem ORC dengan variasi fluida kerja diantaranya R-134a, R-32, R- 407A, dan R-422C. Untuk meningkatkan peforma kerja sistem ORC, maka pada penelitian ini dilakukan optimasi dengan modifikasi parameter perlakuan pada suhu keluaran kondensor dan evaporator. Parameter yang disimulasikan adalah suhu keluar kondensor dimulai dari suhu 20 °C sampai 52 °C tiap kenaikan 0,5 °C, sedangkan pada suhu keluar evaporator disimulasikan dari suhu 71 °C sampai 85 °C tiap kenaikan 0,5 °C. Hasil simulasi ORC menunjukkan bahwa R-422C adalah fluida kerja yang optimum diantara fluida kerja lainnya dengan efisiensi termal yang dihasilkan sebesar 13,68%. Efisiensi tersebut didapat pada suhu keluar kondensor 51,5 °C dan suhu keluar evaporator 73 °C. Hal ini juga ditunjukkan oleh nilai daya yang dibutuhkan pompa (Win) yang lebih kecil dan kalor yang dibutuhkan oleh evaporator (Qin) juga lebih kecil dibandingkan dengan fluida kerja lainnya, sehingga kalor buang (Qout) yang dihasilkan minimum dan efisiensi termal bernilai lebih tinggi., Sipahutar (2019) has simulated Organic Rankine Cycle system using Cycle Tempo software. This simulation was conducted to determine the working performance of ORC system with variations of working fluid including R-134a, R-32, R-407A, and R-422C. To improve the performance of ORC system work, then in this study was done optimization with modification of treatment parameters at the temperature of condenser exit and evaporator exit. The simulated parameter is the condenser exit temperature starting from 20 °C to 52 °C per increase of 0,5 °C, while in the exit temperature the evaporator is simulated from 71 °C to 85 °C per increase of 0,5 °C. ORC simulation results showed that R-422C is an optimum working fluid among other working fluids with a resulting thermal efficiency of 13,68%. The efficiency is obtained at the exit temperature of the condenser 51,5 °C and the evaporator exit temperature of 73 °C. It is also indicated by the required power value of the pump (Win) is smaller and the heat required by the evaporator (Qin) is also smaller compared to other working fluids, so that the resulting minimum exhaust heat (Qout) and thermal efficiency are of higher value.
Keyword: fluid properties, optimization, ORC, simulation, thermal efficiency