Judul: Case Study of The Prevalence of Retained Placenta In  Dairy Cows At Koperasi Peternakan Bandung Selatan (KPBS) and Tempat Pelayanan Koperasi (TPK) Goha Pangalengan Bandung
Abstrak: Kasus retensio plasenta (RP) masih sering ditemukan di peternakan sapi perah.Penurunan produksi air susu menjadi faktor kerugian ekonomi. Kajian retensio plasenta dan penanganan masih sedikit dilakukan. Tujuan studi ini untuk mengidentifikasi prevalensi, faktor pengaruh dan penanganan retensio plasenta di KPBS Pangalengan dan TPK Goha. Data kajian diperoleh dari catatan KPBS Pangalengan dan hasil wawancara dengan dokter hewan dan paramedik. Data yang diperoleh dihitung dengan rumus perhitungan prevalensi RP dan diperoleh nilai-nilai prevalensi RP di KPBS Pangalengan sebanyak 5,82 % dan di Goha sebayak 22,70% selama 5 tahun. Prevalensi RP tahun 2020 (46,00%) ke 2021 (13,0%) terdapat penurunan yang tajam dengan selisih nilai prevalensi 33,00%. Data menunjukkan sebanyak 16,00% kasus RP disebabkan oleh abortus dan sebanyak 21,70% menyebabkan kasus endometritis selama 5 tahun. Faktor pengaruh kasus RP adalah pakan dan sanitasi kandang. Penanganan kasus RP dapat dilakukan dengan menggunakan metode manual removal dengan pemberian bolus antibiotik. Di KPBS Pangalengan kasus RP mengalami penurunan dalam waktu 5 tahun, dengan penambahan cattle-mix, serta selalu menjaga sanitasi kandang. Metode manual removal masih dapat dipakai sebagai metode penanganan retensio plasenta., Placental retention (PR) cases are still common in dairy farms. Economic loss due to decreased milk production is one of the impacts. There are still few studies on placental retention and it’s handling. The purpose of this study was to identify the prevalence, influencing factors and handling of placental retention in KPBS Pangalengan and TPK Goha. Study data were obtained from records of KPBS Pangalengan and interviews with veterinarians and paramedics. The PR prevalence calculation formula was used and from the calculation obtained the PR prevalence value at KPBS Pangalengan as much as 5.82% and in Goha as much as 22.70% for 5 years. Prevalence PR in 2020 (46.00%) to 2021 (13.0%) showed a sharp decrease with a difference in prevalence value of 33.00%. The data showed that 16.00% of PR cases were caused by abortion and 21.70% caused endometritis cases over 5 years. Factors influencing PR cases are feed and cage sanitation. Handling PR cases is still using the manual removal method by giving antibiotic boluses can still be done. At KPBS Pangalengan PR cases have decreased within 5 years, with the addition of cattle-mix, and always maintaining cage sanitation. The manual removal method can still be used as a method of handling placental retention.
Keyword: abortus, endometritis, premix, retensio plasenta, abortion, placental retention

Judul: Hubungan Retensio Sekundinae Danendometritisdenganefisiensi Reproduksi Pada Sapi Perah: Studi Kasus diKoperasi Peternak Sapi Bandung Utara (KPSBU) Lembang, Jawa Barat
Abstrak: This study aims to explore the relationship between retained placenta and endometritis with reproduction efficiency i.e. conception rate (CR) and service per conception (S/C) in dairy cows. The study was conducted at Koperasi Peternak Sapi Bandung Utara (KPSBU) Lembang, and Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) Dramaga Bogor Station, West Java. Data of retained placenta, endometritis cases, and reproduction efficiency during 2007-2009 were collected from KPSBU Lembang, and data of rainfall during 2007-2009 were compiled from BMKG Dramaga Bogor Station, West Java. Descriptive and correlation analysis were applied in data processing. Correlation coefficient (r) and determination coefficient (r2%) were tested using Minitab version 14 to respectively show degree of relationship and influence between variables. The result shows that retained placenta has correlation with endometritis (r=0.013), CR (r = 0.279), S/C (r=-0.119), and rainfall (r=0.235). Endometritis is correlated with CR (r=0.264), S/C (r=-0.159), and rainfall (r=-0.198). The rainfall has correlation with reproduction efficiency (CR) (r=0.103) and (S/C) (r=-0.222). Retained placenta explains 0.017% of endometritis, 7.78% of CR, 1.42% of S/C, and 5.52% of rainfall. Endometritis illustrates 6.97% of CR, 2.53% of S/C, and 3.92 of rainfall. Rainfall clarifies reproduction efficiency 1.06% of CR and 4.93% of S/C. Thus, retained placenta, endometritis, and rainfall are factors influencing CR and S/C.
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Judul: Formulasi Hamiltonian untuk Menggambarkan Gerak Gelombang Soliter Dimensi Tiga di Permukaan Laut
Abstrak: Gelombang permukaan adalah gelombang yang terjadi perbedaan rapat massa antara air dan udara. Salah satu gelombang permukaan yang ditinjau adalah gelombang soliter. Formulasi gelombang soliter dilakukan dengan menggunakan formulasi Hamiltonian.
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