Judul: Alat pengukur gelombang pasang surut presisi tinggi
Abstrak: Pemahanan terhadap pasang surut dapat memberikan manfaat yang besar bagi manusia seperti transportasi, penanganan pencemaran, dan penanganan pelabuhan atau objek wisata. Hingga kini telah banyak jenis alat pengukur pasang surut yang telah dirancang, namun presisi tinggi yang dirancang ini adalah untuk menyempurnakan rancangan sebelumnya yaitu Instruments Digital Pasang Surut (IDPS), dengan memasukkan faktor suhu, menambahkan satuan pengukuran dan jarak jangkauannya. Dalan perancangan alat pengukur pasang surut ada beberapa tahap yang harus dilakukan. Pertama perancangan pada papan rancang (bread board) antara lain perancangan clock dasar baik untuk satuan centimeter maupun milimeter, interval duration, perancangan clock dasar baik untuk satuan
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Judul: Rancangan Bangun Prototipe Instrumen Digital Pasang Surut
Abstrak: Indonesia dan lautan adalah dua hal yang tidak dapat dipisahkan karena sebagian besar wilayah negara ini dilingkupi oleh air. Salah satu proses fisik yang selalu dijumpai adalah gerak naik-turunnya permukaan air secara periodik yang disebut pasang surut atau pasut. Teknik pengukuran pasut air laut dapat dilakukan baik dengan cara tradisional maupun dengan cara modern. Cara tradisional yang telah lama dikenal orang adalah dengan menggunakan rambu pasut. Kelemahan dalam pengukuran dengan cara ini adalah kesalahan mata si pengamat dalam melihat nilai rambu pasut saat itu.
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Judul: Effects of Alcohol Consumption on Spatial Memory Performance and Neuron Complexity
Abstrak: Alcoholic beverages have always been a common drink all around the globe. The ethanol that is contained inside these alcoholic beverages have been known to have various negative side effects to the brain if consumed excessively. Other articles have claimed a certain moderate amount of alcohol consumption could have beneficial effects on the brain, but no exact concentration limit of consumption has been elaborated to cause damage in the hippocampal area. The objective of this research is examining the effects of alcohol towards neuron complexity and spatial memory performance. Four groups of mice were used as test subjects and were given the solution pre-orally. The first group is the control group which is given water, the second group was given 5% alcohol, the third group was given 15% alcohol, and the fourth group was given commercially sold alcoholic beverage. The mice were given said solutions in the span of 30 days. Spatial memory performance is observed by how a mice scores inside a Y-maze in the span of 5 minutes after 30 days of treatment. Neuron complexity is determined by the number of intersections of dendrites and the maximum angle of neurons inside the Dentate Gyrus (DG) and Cornu Ammonis (CA) region of the hippocampus which is observed by Golgi-Cox staining, photographed with optilab and then analyzed using the ImageJ application. alcohol consumption does not have any significant effect on spatial memory performance nor neuron complexity in the hippocampal area. These findings are not significantly different than the control group, possibly because the treatment is not chronic enough to trigger a significant physiological change.
Keyword: Ethanol, spatial memory, complexity, hippocampus