Judul: Performance of KUD Mojosongo using the Balanced Scorecard approach
Abstrak: Belum adanya pengukuran kinerja KUD Mojosongo secara menyeluruh dan terus berkurangnya anggota koperasi membuat Koperasi Unit Desa Mojosongo terus mengalami kerugian. Untuk menghindari kerugian yang tidak dapat dideteksi oleh alat ukur kinerja yang biasa dipakai, maka digunakanlah metode balanced scorecard. Tujuan dari penelitian ini ialah untuk mengetahui kinerja KUD Mojosongo sebagai salah satu koperasi penghasil susu terbesar di Jawa Tengah menggunakan pendekatan Balanced Scorecard. Belum adanya pengukuran kinerja KUD secara menyeluruh dan terus berkurangnya anggoata koperasi membuat peneliti tertarik menjadikan KUD Mojosongo menjadi objek penelitian. Pengukuran koperasi dilakukan menggunakan metode Balanced Scorecard dan pengambilan data dilakukan secara purposive dengan penyebaran kuesioner dan wawancara. Hasil pengukuran kinerja keseluruhan 1 Hasil pengukuran kinerja keseluruhan koperasi memperoleh nilai 76,4% dengan predikat sehat (A). Hal ini menandakan bahwa koperasi memerlukan peningkatan di setiap perspektifnya. Predikat sehat (A) masih memiliki kekurangan, utamanya diperoleh karena perspektif keuangan, yang merupakan perspektif dominan menunjukkan kinerja yang kurang sehat dengan dengan nilai kinerja perspektif sebesar 45,4% dengan total nilai kinerja koperasi sebesar 15,2% predikat kurang sehat (BB), Sementara jika dilihat dari perspektif yang memiliki pengaruh dominan pada kinerja KUD Mojosongo didapat perspektif yang menempati peringkat pertama sebagai faktor dominan dalam kinerja KUD Mojosongo adalah perspektif internal bisnis dengan kinerja perspektif sebesar 117,4%. Perspektif yang menempati posisi kedua dominan adalah pertumbuhan dan pembelajaran dengan kinerja perspektif sebesar 109,6% yang menandakan indikator ini memiliki predikat sangat sehat (AAA). Perspektif yang menempati posisi dominan ketiga adalah perspektif pelanggan., The absence of comprehensive performance measurements for KUD Mojosongo and the continuous decrease in cooperative members have led to consistent losses for the Mojosongo Village Unit Cooperative. In order to prevent losses that may go unnoticed by conventional performance measurement tools, the balanced scorecard method is employed. The purpose of this research was to assess the performance of KUD Mojosongo, one of the largest milk-producing cooperatives in Central Java, since the member is declining and the KUD need a comprehensive performance measurement. The KUD’s performance was assesed by Balanced Scorecard approach. The data that are collected with questionnaire and interview reveal the measurement results of the overall performance of the cooperative obtained a score of 76.4% with a healthy (A) predicate. This indicates that the cooperative requires improvement in every perspective. The healthy (A) predicate still has shortcomings, primarily because of the financial perspective, which is the dominant perspective showing a less healthy performance with a perspective performance score of 45.4% and a total cooperative performance score of 15.2%, indicating a less healthy (BB) predicate. Meanwhile, when viewed from the perspective that has a dominant influence on the performance of KUD Mojosongo, the perspective that ranks first as the dominant factor in KUD Mojosongo's performance is the internal business perspective with a performance score of 117.4%. The perspective that occupies the second dominant position is growth and learning with a perspective performance score of 109.6%, indicating that this indicator has a very healthy (AAA) predicate. The perspective that occupies the third dominant position is the customer perspective.
Keyword: balanced scorecard, kinerja koperasi, koperasi, Peternak, susu sapi

Judul: Performance Measurement of Koperasi Serba Usaha Karya Nugraha Jaya with Balanced Scorecard approach
Abstrak: Umumnya pengukuran kinerja pada koperasi bergantung hanya pada aspek keuangannya saja. Pentingnya pengukuran kinerja secara menyeluruh baik secara internal maupun eksternal menjadi latar belakang Koperasi Serba Usaha Karya Nugraha Jaya untuk diukur kinerjanya. Penelitian ini bertujuan untuk mengukur kinerja koperasi dengan menggunakan pendekatan balanced scorecard. Pengambilan data didapatkan dengan wawancara langsung dan pengisian kuesioner. Hasil penelitian menunjukkan bahwa karyawan, peternak dan pengurus koperasi sudah berkolaborasi dengan baik. Pengukuran kinerja Koperasi Serba Usaha Karya Nugraha Jaya menunjukkan predikat baik dan sangat baik, perspektif keuangan mendapatkan nilai 18,1%, perspektif bisnis internal dengan nilai 23,9%, perspektif pelanggan dengan nilai 23,6%, dan perspektif pertumbuhan dan pembelajaran dengan nilai 19,8%. Secara menyeluruh kinerja koperasi mendapatkan nilai 85,5% dan mendapatkan predikat sangat baik dengan label berwarna biru., Performance measurement of a cooperative are generally assessed from a financial perspective only. The importance of measuring the overall performance of both internal and external, became the chosen background of this research. This research has objective to identify measure performance cooperative with balanced scorecard approach. Data retrieval were carried out with direct interviews and filling out the questionnaire. The result showed that the cooperative employee, breeders and management have clear collaboration. The measurement of cooperative performance shows get good and excellent predicate, the financial perspective has a value of 18.1%, the internal business perspective got value of 23.9%, the customer perspective got value of 23.6%, and the perspective of growth and learning got value of 19.8%. Overall cooperative performance got a value 85.5% and got the predicate very well or blue color card.
Keyword: balanced scorecard, cooperative performance, KSU Karya Nugraha Jaya

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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