Judul: Pengaruh Curah Hujan terhadap Frekuensi Kejadian Penyakit Reproduksi pada Sapi Perah: Studi Kasus di KPBS Pangalengan, Jawa Barat
Abstrak: This research was aimed to explain the rainfall correlation to incident frequency of the dairy cattle reproduction disease in Koperasi Peternakan Bandung Selatan (KPBS) Pangalengan, West Java. Research variables are data of rainfall and reproduction disease on 2010-2012 that analysed using correlation and regretion analysis. The highest reproduction disease incidents that happened on 2010-2012 were hypocalsemia, retained placenta, abortus, mastitis, and endometritis. Reproduction disease incidents that have correlation to rainfall value (mm/month) are mastitis, ketosis, premature, and milk let down failure. Mastitis and milk let down failure which are 14% and 12.8% effected by high rainfall (rain season) on January-April, and November-December, while ketosis and premature which are 13.3% and 11.7% effected by low rainfall (dry season) on May-October. The high incidents of reproduction diseases that have not effected by rainfall may effected by other factors, like disease case that not treated, late report of disease case, incompetency farmer in cattle treatment, also paramedic and veterinarian availability.
Keyword: dairy cattle, KPBS Pangalengan, rainfall, reproduction disease

Judul: Studi Tingkat Kejadian Kasus Penyakit Dalam pada Sapi Perah di Koperasi Peternakan Bandung Selatan (KPBS) Pangalengan Tahun 2014 - 2019
Abstrak: Studi ini bertujuan mengidentifikasi tingkat kejadian kasus penyakit dalam pada sapi perah di Koperasi Peternakan Bandung Selatan Pangalengan tahun 2014-2019 dan dugaan hubungannya dengan faktor cuaca. Data kejadian penyakit diperoleh dari laporan praktik lapang mahasiswa Program Profesi Dokter Hewan Institut Pertanian Bogor di KPBS tahun 2014-2019. Pengamatan terhadap suhu dan kelembapan tidak menunjukkan perubahan berarti jika dibandingkan dengan perubahan curah hujan di daerah Pangalengan. Data kejadian penyakit yang didapatkan kemudian dibandingkan dengan dinamika curah. Kejadian penyakit dan kondisi cuaca dikelompokkan berdasarkan trimester waktu dalam 12 bulan yaitu trimester pertama (Januari-Maret), trimester kedua (April-Juni), trimester ketiga (Juli-September), dan trimester keempat (Oktober-Desember) Musim Hujan di Pangalengan terjadi pada trimester pertama, kedua, dan keempat. Musim kemarau di pangalengan terjadi pada trimester ketiga. Penyakit yang diduga berkorelasi positif dengan curah hujan adalah mastitis, laminitis, dan ketosis. Penyakit yang diduga berkorelasi negatif dengan curah hujan adalah Downer Cow Syndrome. Penyakit yang diduga tidak berhubungan dengan cuaca adalah hipokalsemia, rumen asidosis, enteritis, indigesti, dan pneumonia., The objectives of this study were to analyses the internal disease case incidences rate in South Bandung Coop Farm (KPBS) Pangalengan since 2014 until 2019 and its suspected correlation to the weather. Data were collected from the field practice report of students Veterinary Profession Program (PPDH) Institut Pertanian Bogor at KPBS in 2014 - 2019. The collected data were compared to the weather dynamics at Pangalengan region. The disease occurrence and weather conditions are grouped by time trimester in 12 months, the first trimester (January - March), second trimester (April - June), third trimester (July - September), and fourth trimester (October - December). Rainy season in Pangalengan occur on the first, second, and fourth trimester. Dry season in Pangalengan occur on the third trimester. Diseases that were suspected to positively correlated with rain fall were mastitis, laminitis, and ketosis. Diseases that were suspected to negatively correlated with rain fall were downer cow syndrome. Diseases that were not suspected to correlate with the rainfall were arthritis, hypocalcemia, ruminal acidosis, enteritis, indigestion, and pneumonia.
Keyword: dairy cattle, internal disease, KPBS Pangalengan, trimester, rainfall

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology