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Penelitian ini merupakan penelitian pengembangan yang bertujuan mengembangkan LKPD berbasis PBL untuk meningkatkan keterampilan  berpikir kritis peserta didik pada materi kesetimbangan kimia yang valid, praktis dan efektif digunakan. Model pengembangan yang digunakan dalam penelitian ini mengacu pada model pengembangan Hannafin & Peck, yang terdiri dari tahapan penilaian kebutuhan (need assessment), desain (design), dan pengembangan (develop) dan implementasi (implementation). LKPD berbasis PBL yang telah dikembangkan, divalidasi oleh dua orang ahli. Uji coba LKPD dilakukan di SMA Negeri 21 Makassar pada kelas XI-IPA4 dengan jumlah peserta didik sebanyak 35 orang. Uji  coba ini dilakukan untuk menguji keefektifan dengan memberikan angket respon peserta didik, pengamatan aktivitas peserta didik dan test keterampilan berpikir kritis, kemudian menguji kepraktisan dilakukan pengamatan keterlaksanaan LKPD, angket respon guru dan lembar pengamatan aktivitas guru. Hasil penelitian menunjukkan bahwa LKPD berbasis PBL yang dikembangkan telah dilakukan validasi, yang dinyatakan sangat valid. LKPD berbasis PBL dikatakan praktis dan efektif, karena pada uji kepraktisan yang berhubungan dengan: (1) keterlaksanaan LKPD, menunjukkan seluruh aspek dalam pembelajaran berada pada kategori terlaksana seluruhnya, (2) guru memberikan respon yang positif terhadap LKPD yang digunakan, dan (3) kesesuaian ativitas guru dengan model pembelajaran berbasis masalah berada pada batas interval toleransi. LKPD ini juga memenuhi kriteria keefektifan, dengan hasil: (1) Aktivitas peserta didik berada pada batas interval toleransi; (2) Keterampilan berpikir kritis mengalami peningkatan dengan nilai rata-rata N-Gain sebesar 0,824 yang termasuk dalam kategori tinggi, dan (3) Peserta didik memberikan respon yang positif terhadap LKPD berbasis PBL yang digunakan. Kata kunci: Pengembangan, LKPD Berbasis PBL, Keterampikan Berpikir Kritis, Kesetimbangan Kimia

This study was designed to predict the fertility of water buffalo bull using post-thaw semen quality parameters during peak breeding season. Thirty ejaculates were collected from five bulls with artificial vagina and cryopreserved. At post-thaw, semen was analysed for motility parameters, velocity distribution, kinematics, DNA integrity/fragmentation, viability, mitochondrial transmembrane potential, morphology, plasma membrane and acrosome integrity. Data of 514 inseminations were collected for estimation of in vivo fertility. Pearson's correlation coefficients showed that progressive motility (PM), rapid velocity, average path velocity, straight line velocity, straightness, supravital plasma membrane integrity, viable spermatozoon with intact acrosome or with high mitochondrial activity were correlated with in vivo fertility (r = .81, p < .01; r = .85, p < .01; r = .64, p < .05; r = .73, p < .05; r = .57, p < .05; r = .88, p < .01; r = .84, p < .01 and r = .81, p < .01 respectively). Step forward multiple regression analysis showed that the best single predictor of fertility was PM. However, combinations of semen quality parameters to predict fertility were better as compared to single parameter. In conclusion, fertility of buffalo bull can be predicted through some of the post-thaw in vitro semen quality tests during peak breeding season.

This study aims to analyze the challenges of industrial work in the industrial revolution 5.0 towards the grade point average (GPA) for electronic engineering education students. This study was conducted in accordance with the development of the industrial world with the entry of the 5.0 industrial revolution and the demands of the world of education that must be met to improve the quality of graduates. The research objects are Electronics Engineering Students’. Sampling in this study uses the Slovin formula. A total of 75 students were involved in this study, with a sample of 43 people. To analyze the research data uses SPSS Version 20. The result shows that (1) industrial work motivation has a positive and significant on students’ grade point average (GPA) of electronics engineering students’ (2) work readiness in the industry has a positive and significant on students’ grade point average (GPA) of electronics engineering students’ (3) industrial work motivation and work readiness in the industry together have a significant on students’ grade point average (GPA) of electronics engineering students’.