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Stress is an internal condition, can be caused by a physical (body), or environmental demands, and social situations, which are potentially damaging and uncontrolled. In a previous study, it had been carried out at the Sialang Rindang Village Office about work stress on 12 workers. Initial data obtained 33.3% or 4 people who experienced work stress from 12 respondents and 66.6% or 8 respondents did not experience work stress. To find out about the effect of giving aromatherapy to workers on work stress at the Sialang Rindang village office in 2020. The method used is a quantitative research using a quasi-experimental design. The number of samples used was 30 people. Before being given aromatherapy it is known that the average work stress score at the first measurement was 82.47 with a standard deviation of 33.277. After being given aromatherapy, it is known that the average work stress is 67.97 with a standard deviation of 13.389. Judging from the significant effect between the work stress of the first measurement with the second measurement, seen from the change in the mean value between the first and second measurements of 14.5 with a standard deviation of 19.8 where the statistical test results obtained P-value of 0,000 (<0.05).

Penelitian ini dilatarbelakangi dari hasil belajar siswa yang masih jauh dari ideal. Hal ini bisa dilihat dari hasil ketuntasan belajar yang rendah. Penelitian ini bertujuan untuk meningkatkan konsentrasi belajar siswa kelas V SD Negeri Bengle 1 dalam proses pembelajaran melalui penerapan model Cooperative Script. Penelitian tindakan kelas ini menggunakan model Kemmis dan Taggart . Subjek penelitian berjumlah 20 siswa. Data konsentrasi belajar siswa dikumpulkan menggunakan lembar observasi dan data hasil belajar. Selanjutnya data tersebut dianalisis secara kualitatif. Hasil penelitian menunjukkan bahwa konsentrasi belajar siswa meningkat melalui penerapan model pembelajaran Cooperative Script . Pada siklus I, berdasarkan hasil observasi, rata-rata skor konsentrasi siswa adalah 29 dengan persentase 72,5%. Pada siklus II, perbaikan yang dilakukan adalah mengubah materi, memberi motivasi kepada siswa dengan rekannya, dan memperbaiki ide pokok-ide pokok dalam materi. Melalui perbaikan tersebut, pada siklus II rata-rata skor konsentrasi belajar siswa berdasarkan hasil observasi meningkat menjadi 33 dengan persentase sebesar  82,5%. Persentase tersebut belum menunjukkan KKM klasikal sehingga peneliti merasa perlu melakukan perbaikan dan melanjutkan pada siklus III. Melalui perbaikan tersebut hasil penelitian menunjukkan peningkatan konsentrasi belajar siswa meningkat menjadi 37 dengan persentase sebesar 92,5%.Persentase tersebut telah melampaui indikator keberhasilan yaitu rata-rata konsentrasi belajar siswa melampaui 88 %. Sehingga tindakan dihentikan pada siklus III.

Hardware Design and Simulation of Lung Sound Detector to Analyze Lung Abnormalities Based on Arduino Mega and NodeMCU ESP32 is a development of auscultation technique which is supported by signal display on oscilloscope, organic light-emitting diodes and computer on the lung sound detection circuit system connected to NodeMCU ESP32. The design and simulation consists of a stethoscope as an initial detection, then amplified with a mic-condenser pre-amp circuit connected a band pass filter, a buffer amplifier entering ADC 0 (GPIO36) processed by NodeMCU ESP32 and sending data in the form of free frequency via Arduino Mega and NodeMCU ESP32 as transmitters. and mobile phones as receivers of the frequency form display of lung sounds. Software for NodeMCU ESP32 communication with mobile phone using Blink software based on Internet of Things (IoT). In detecting the condition of the patient's lungs, it provides information that on the signal display on oscilloscopes, organic lightemitting diodes, computers and mobile phone, namely by displaying the sound of the lungs when exhaling and inhaling air from the test results can detect lung sounds which have a frequency limit of 20 Hz. up to 1000 Hz. to make it easier for doctors to analyze the patient's lung abnormalities from the observed frequency.

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