Cocopeat machines that have been developed today, were carried out with variations in the speed of rotation, blade length, blade shape, and treatment of objects (coconut coir immersion). There has been no development of a cocopeat machine that focuses on variations of blade density. It is suspected that the blade density affects to the difference of cocopeat mass produced. This study was a true experiment. The dependent variable was cocopeat mass. The independent variables were blade density, consisting of σ1 (84/210π), σ2 (42/210π) and σ3 (21/210π). For each variation of the independent variable was conducted 10 experiments. The study sample was 30 pieces of coconut coir. The mass of each coconut coir was 50 grams. The engine's spin speed, length and blade shape, are the same for all samples. The data was analyzed using the t test at a significance level of 5%. The average mass values of cocopeat were σ1 (  = 16.5430; S1 = 1.9674), σ2 (  = 12.2650; S2 = 1.8341) and σ3 (μ3 = 10.0988; SD = 1.8943). The t test showed that the difference in the average value of cocopeat mass between groups were to12 = 5,030; to23 = 2,598; and to13 = 7,462. If t-table value for ν = 18 was 2,101, so . Ho was rejected and H1 accepted, so there was a difference of cocopeate mass that produced by poltesa cocopeat machine, which is effected by variations of blade density.

<p><em>The purpose of this study was to describe the process and results of making cocopeat dryers with a hybrid system based on solar panels. This research was conducted with a tool development method consisting of five steps, namely literature study, design, tool and material preparation, manufacturing, and functional tests. The study results were (1) the process of making cocopeat dryers with a hybrid system based on the solar panel was the calculation of solar panel components, frame making, coating of frames with the casing, assembling of electronic components, and functional tests. (2) The cocopeat dryer with a hybrid system based on solar panels that have been made has dimensions of 120 cm in length, 60 cm in width, and 130 cm in height—equipped with a 100 Wp solar panel, a 12 V 65Ah dry battery, a 600 W inverter, three 15W halogen lamps, and a 22W fan. (3) The functional test results show that the average temperature inside the dryer is 52.84oC, 8.56oC higher than the temperature outside the tool. The average humidity inside the dryer is 23.4%, 17.2% lower than the humidity outside the appliance.     </em></p>

<p><em>The purpose of this study was to determine the effect of solar panel circuits on current, voltage and power. This research is a true experiment. Dependent variables were current, voltage, and power. Independent variables were a series circuit of solar panels and a parallel circuit of solar panels. The sample numbers of studies were 12 for each group of independent variables. The data were analyzed using the t-test at the 5% signification level. The results showed that the electrical power produced by a series circuit of solar panels was, P = 4.81 watt, Sd = 0.24. The electrical power produced by a parallel circuit of solar panels was P = 4.69 watts, Sd = 0.13. The t-test showed that there was no difference in electrical power produced by the series circuit of solar panels and parallel circuit of solar panels, with t_o = 1.525 &lt; t_{α/2, v} =2,074. The form of a circuit (series or parallel) has no significant effect on power but differs only in current and voltage. In series circuit, I₁ = I₂ = I_Σ and V₁ +V₂ = V_Σ. In parallel circuits V₁ = V₂ = V_Σ and I₁ + I₂ = I_Σ. This can be adjusted to our purpose of using solar panels circuit. If it requires a large current, the solar panels must assemble in a parallel circuit. But if it requires a large voltage, the solar panels must assemble in a series circuit.</em></p><p><strong><em>Keywords</em></strong><strong><em>:</em></strong><strong><em> </em></strong><strong><em>current, parallel, power, series, voltage</em></strong></p>

ABSTRAKMata adalah organ penglihatan yang sangat penting bagi manusia. Mataterdiri dari sistem optik kompleks yang mengumpulkan cahaya dari sekitarnya.Ganguan mata yang dapat menyebabkan kebutaan salah satunya adalah katarak.Data dari Riset Kesehtan Dasar Kementrian Kesehtan Republik Indonesiamelaporkan prevalensi katarak di Provinsi Nusa Tenggara Timur adalah 2,3%. Tigaalasan utama penderita katarak adalah karena ketidaktahuan (41,4%),ketidakmampuan (14,1%), dan ketidakberanian (5,7%). Hal ini berarti bahwakebutaan akibat katarak di NTT cukup tinggi karena banyak penderita katarak tidakmengetahui dirinya mempunyai penyaki katarak. Pemeriksaan katarak di rumahsakit menggunakan alat slit lamp, namun alat ini hanya terdapat pada rumah sakityang memiliki poli mata. Oleh karenanya diperlukan sistem deteksi katarak yangdapat membantu mendeteksi katarak sehingga dapat dialkukan tindakan dengantepat. Tujuan penelitian ini yaitu merancang sistem deteksi katarak berdasarkannilai statistik tekstur (Gray Level Co-Occurrance Matrix) dengan klasifikasi jarakMinkowski. Penelitian ini mengunakan kamera Nikon D90 12,3 Megapixel denganlensa AFD Nikon 50 mm f1.8 untuk memperoleh citra mata normal dan katarak.hasil yang diperoleh menunjukkan bahwa sistem ini mampu untuk mendeteksi danmengklasifikasi mata normal, katarak imatur dan katarak matur dengan akurasi94,74% pada variasi nilai statistik tekstur dengan jarak pixel antar tetangga 5 pixeldengan kliasifikasi jarak minkowski pada koefisien minkowski  =1,  =2 dan =3.Kata kunci: deteksi katarak, nilai statistik tekstur, jarak minkowskiABSTRACTThe eye is an organ of vision that is very important for humans. the eyeconsists of a complex optical system that collects light from the surroundings. eyedisorders that can cause blindness are cataracts. data from the basic healthresearch of the republic of indonesia ministry of health reports that the prevalenceof cataract in east nusa tenggara (ntt) province is 2.3%. the three main reasons forcataract sufferers are due to ignorance (41.4%), disability (14.1%), and lack ofcourage (5.7%). this means that blindness due to cataract in ntt is quite highbecause many sufferers do not know that they have cataract disease. cataractexamination at the hospital using a slit lamp device, but this tool is only available inhospitals that have eye departmen. therefore a cataract detection system is neededthat can help detect cataracts so that action can be taken appropriately. thepurpose of this study is to design a cataract detection system based on the texturestatistical values (gray level co-occurrance matrix) with minkowski distanceclassification. this study uses a 12.3 megapixel nikon d90 camera with afd lens nikon 50 mm f1.8 for obtain the image of normal eye and cataracts. the resultsobtained show that this system is able to detect and classify normal eyes, imaturcataract and mature cataract with an accuracy of 94,74% on variations in texturestatistical values with a pixel distance between nieghbors of 5 pixel with minkowskidistance classification at minkowski koefisient  =1,  =2 and  =3.Keywords: cataract detection, texture statistical values, minkowski distance

ABSTRAKJenis penelitian ini adalah penelitian quasi experiment dengan rancangan pretest-posttest nonequivalent control group design. Populasi penelitian ini adalah mahasiswa semester III tahun pelajaran 2017/2018 yang memprogram mata kuliah fisika. Sampel diambil dengan cara simple random sampling dan berjumlah 40 orang mahasiswa. Data yang dikumpulkan dalam penelitian ini adalah data pengetahuan awal dan data hasil perkuliahan mahasiswa. Instrumen yang digunakan dalam penelitian ini adalah tes hasil belajar fisika. Data dianalisis menggunakan anakova dengan taraf signifikansi 5%. Berdasarkan hasil analisis data, diperoleh bahwa terdapat perbedaan yang signifikan hasil belajar antara kelompok eksperimen yang belajar dengan menggunakan BA-CTL dan kelompok kontrol yang belajar dengan menggunakan BAK dalam perkuliahan fisika (F = 97,135; p = 0,001; p < 0,05). Nilai rata-rata kelompok eksperimen (μi = 70,94 dan SD = 6,77) dan kelompok kontrol (μj = 58,00 dan SD = 7,83). Kelompok ekseprimen menunjukkan hasil belajar yang relatif lebih tinggi dibandingkan dengan kelompok kontrol.Kata kunci: Pengaruh, Buku, Fisika, CTL.ABSTRACTThis research type is quasi experiment research with pretest-posttest nonequivalent control group design. The population of this study is the students of the third semester of the academic year 2017/2018 who program the physics course. The sample was taken by simple random sampling and amounted to 40 students. The data collected in this research is preliminary knowledge data and data of student lecture result. The instrument used in this research is physics test result. Data were analyzed using anakova with significance level of 5%. Based on the result of data analysis, it was found that there were significant differences of learning outcomes between the experimental group studied by using BA-CTL and control group who studied by using BAK in physics lecture (F = 97,135; p = 0,001; p <0,05). The mean value of the experimental group (μi = 70.94 and SD = 6.77) and the control group (μj = 58.00 and SD = 7.83). The group of ekseprimen showed relatively higher learning outcomes compared to the control group.Keywords: Effect, Book, Physics, CTL