This study aims to determine the students' learning difficulties from the experimental observations of human sensory, cognitive and learning indicators and factors that cause the learning difficulties in class XI of Science at MAN 1 Stabat at the year of learning 2015/2016. The study used descriptive quantitative design. Samples were taken by total sampling with 71 students. The technique of data collection used observation tests, diagnostic tests and questionnaires. The results show that the percentage of the students' learning difficulties from the highest to the lowest on cognitive aspects, they are C5, C6, C3, C4, C2 and C1 for amount 70.43%, 53.06%, 51.17%, 47.09%, 44, 72% and 34.51%. The Percentage of students' learning difficulties based on the indicators in the material of human sensory system are indicator (1) amount 65.26% categorized as very high, the indicator (2) amount 45.54% categorized as high, the indicator (3) amount 43.98% categorized as high and the indicator (4) of 53.93% categorized as very high. Internal and external factors that cause the learning difficulties of learning difficulties highest to lowest percentage are the subject matter (61.40%), the school environment (61.26%), instructional media (54.66%), intelligence (45.07%), motivation (43.48%), parents (42.69%), the environment (41.81%), psikiatik (41.19%), teachers (41.10%), interest (39.17%) and health (38.99%).Keywords: Cognitive Aspects, Human Sensory Systems, Learning Difficulties, , Learning Indicators

This research purpose is to show the inhibition of the extract of ethanol and ethyl acetate stem bark and leaf of Raru according to the causes of bacterial E-coli (ATCC 25922) and St Aureus (ATCC 25923) with variation concentration 10%, 5%, 2.5% and 1.25%. Methods used were diffusion with disk blank paper and disk cloramphenicol as a control. The highest result observed on 10% concentration among the variation. This concentration then compared with control and the result as follow for stem bark of ethanol and ethyl acetate exctract for bacterial E

Pengukuran kuat arus secara konvensional dilakukan dengan menggunakan alat ukur yang dipasang seri dengan rangkaian. Tetapi dengan metode sensor magnet, alat ukur kuat arus tidak perlu masuk ke dalam sistem rangkaian. Dengan mendeteksi medan magnet yang terdapat di sekeliling kawat berarus tersebut, besar arus yang mengalir di dalamnya dapat diketahui. Dengan menggunakan hukum ampere yang menyatakan bahwa disekeliling kawat penghantar terdapat medan magnet yang arahnya sesuai dengan kaidah tangan kanan, medan magnet sebanding dengan besar arus yang menghasilkannya, sehingga sensor arus ini merupakan salah satu aplikasi dari sensor magnet. Dalam makalah ini akan dijelaskan prinsip dasar menggunakan sensor medan magnet dalam pengukuran kuat arus.

Jambu air deli hijau memiliki nilai ekonomi yang tinggi dari jambu lainnya. Penelitian ini bertujuan untuk menjelaskan keanekaragaman dan kelimpahan serangga pengunjung pada bunga jambu air deli hijau (Syzygium samarangense) dengan menggunakan alat yellow sticky trap yang dijelaskan dalam skripsi ini. Bunga jambu dari family Myrtaceae memerlukan bantuan serangga dalam proses penyerbukan. Faktor yang mempengaruhi kunjungan serangga pada bunga yaitu kandungan nektar, konsentrasi gula, dan kelimpahan bunga serta memiliki bau harum. Sampel penelitian yang diambil menggunakan metode yellow sticky trap kemudian dianalisis menggunakan indeks keanekaragaman dan indeks dominansi. Selama pengambilan sampel dilakukan didapat 235 jenis serangga yang mengunjungi bunga jambu air deli hijau terdiri dari 21 famili dan 8 ordo serangga.  Dengan indeks keanekaragaman diwaktu pagi 2,774, siang 2,774 dan sore 2,379 sesuai dengan kriteria Shanon-Wiener indeks keanekaragaman ini dikategorikan sedang dan indeks dominansi serangga diwaktu pagi 0,074, siang 0,073 dan sore 0,131 dikategorikan sebagai indeks dominansi yang rendah. Serangga yang mendominasi berkunjung adalah ordo Diptera yaitu pada pagi dan siang hari dari family Tephritidae dan sore hari dari family Tabanidae. Parameter lain yang dilihat ada faktor fisika lingkungan yaitu temperatur suhu yang memiliki suhu tinggi 32°C pada siang hari, kelembaban udara tertinggi 79% pada pagi hari dengan kondisi cuaca mendung dan intensitas cahaya tertinggi 835 x 100 Lux pada siang hari dengan kondisi cuaca terik. Kata kunci : Keanekaragaman, Kelimpahan, Serangga Pengunjung, Bunga Jambu Air Deli Hijau

Information technology can not be denied that it has proved to be very large in the advancement and improvement of the quality of education in this country. Development towards e-learning education is a must for the quality standards of education can be improved because e-learning is a use of digital technology that can deliver a wide range of information in learning. The availability of hardware, software and other supporting facilities such as the internet network at the Faculty of Public Health University Muhammadiyah Aceh can be used as much as possible so that the transformation of education from the conventional learning system into a digital learning system by using e-learning is based on information technology.The design of this study was quantitative and qualitative research with action research approach. The subjects in this study purposive sampling determined by the number of 33 people consisting of elements of the leadership, faculty, and students. Instrument research include guidelines for in-depth interviews, observation guides, brainstorming guides, questionnaires, field notes and other devices in accordance with the development course of study. Has developed a digital learning system using the Dokeos. From the aspect of technology has been supported for the hardware and software. Overall the respondents have used e-learning system and no major obstacles. The results of the evaluation of the degree of ease of reaching the average value of 4.25 with a range from 4.18 to 4.36, the willingness of the average utilization reached a value of 3.89 with a range from 2.29 to 4.75 and also the willingness to support an average of value of 4.83 with a range between 4.39 to 5.0. Thus, it can be seen that the whole has a value above the median number = 3, which means the respondents felt a satisfaction which is felt by the high compliance is expected.Keywords: E-Learning, Dokeos Platform, Information Technology, Education