Problem statement: Jatropha curcas has the potential to become one of the worlds key energy crops. Crude vegetable oil, extracted from the seeds of the Jatropha plant, can be refined into high quality biodiesel. Traditional identification of Jatropha curcas fruits is performed by human experts. The Jatropha curcas fruit quality depends on type and size of defects as well as skin color and fruit size. Approach: This research develops a back propagation neural networks to identify the Jatropha curcas fruit maturity and grade the fruit into relevant quality category. The system is divided into two stages: The first stage is a training stage that is to extract the characteristics from the pattern. The second stages is to recognize the pattern by using the characteristics derived from the first task. Back propagation diagnosis model is used to recognition the Jatropha curcas fruits. It is ascertained for the developed system is used in recognizing the maturity of Jatropha curcas fruits. This study presents a pattern recognition system of Jatropha curcas using back propagation. Results: By using back propagation, it gave an accuracy of about 95% based on our samples which used the twenty-seven images. The results produced by neural network were found to be more accurate due to its capability to distinguished complex decision regions. Conclusion: The training data set for back propagation had 4 levels of grading i.e., raw, fruit-aged, ripe and over ripe with twenty-seven images of Jatropha curcas fruits. At the end of the training, the neural network achieved its performance function by testing with a selected set of different images. The performance of the back propagation was satisfactory when incorporated with the software tool, since there were number of errors arising in categorizing
Misconception about stoichiometry and its impact on the chemical equilibrium concept were studied on 245 second-grade students at SMA Negeri 2 Gowa, South Sulawesi, Indonesia. Research instruments were Stoichiometry misconception test (SMT) and chemical equilibrium misconception three tier tests (CEMTT). Semi structured interview was conducted after the administration of the test for fifteen students. SMT consisted of ten items with high validity of 90.70% and reliability coefficient, calculated using Cronbach's alpha, of 0.73 (high). CEMTT consisted of thirdteen items with very high validity of 96.70% and reliability coefficient, calculated using Cronbach's alpha, of 0.95 (very high). The effect of stoichiometry misconceptions on chemical equilibrium was sufficient with limited predictions (r = 0.36). We identified three misconceptions stoichiometry that had impact on the misconceptions of chemical equilibrium concept namely: 1) The number of moles of substances that react is proportional to the number of atoms, relates to the increasing pressure will shift the equilibrium of the gas toward a substance that has more number of atoms; 2) The increasing of concentration will greather surface area, so as to giving rises to a greather number of effective collisions. This is related to the misconception that changes in the amount of solid phase at heterogeneous equilibrium which would shift the equilibrium system; 3) In exothermic reaction there is an increase in reaction enthalpy, relates to the misconception that the increase of temperature in exothermic gas equilibrium will shift towards the product. It was proven that there was a misconception relationship between the stoichiometry and chemical equilibrium, so it is recommended to implement a learning strategy that can prevent students' misconceptions on the concept of chemical equilibrium by eliminating students' misconceptions on the stoichiometry in chemistry learning.
The number of trees or breadfruit plants in West Sumatra increases every year. Currently the only part of the breadfruit tree that is widely used is the fruit, while the leaves are underutilized and only become waste. Breadfruit leaves contain flavonoids, alkaloids, saponins, and tannins which function as antibacterial. Based on these data, breadfruit leaves, which were originally only used as waste, can be innovated into a new breakthrough, namely the main ingredient for making soap. In addition, as we all know, it is very important to regularly wash our hands with soap, especially during a pandemic like today. However, getting children used to washing their hands regularly with soap is quite difficult for parents. It takes patience and a more serious and earnest effort for this to be achieved. One way is to make soap that attracts children's attention. Scalila Surprise Hand Soap is made by extracting breadfruit leaves and then mixing it with pour and melt soap base that has been melted. Then, it is given dye and essential oil as a soap fragrance and poured into the mold. This product has a unique and cute shape of fruits and animals. In this soap there is a surprise that attracts the attention of children to wash their hands with soap. There are 2 sizes of soap, namely mini size soap for single use and medium size soap for use 5-8 times. In addition, this product also has 3 variants of aroma and color. Red color with strawberry scent, orange color with citrus scent, and green color with green apple scent. This soap is packaged in transparent bottles and transparent plastic and with economical price.
Virtual Laboratory (V-Lab) is a media platform for interaction and visualization of learning for practicum-based courses. V-Lab is a solution to learning problems due to the lack of real laboratory facilities as well as an alternative for practicums that require a high level of safety. The purpose of this study was to determine students' mastery of concepts after using the V-Lab in the core Physics course. The method used is quasi-experimental. The research subjects were 15 Unuha physics education students. The data collection technique is a concept mastery test. The results showed that the increase in mastery of the concept was 0.432 with moderate criteria, while based on the paired sample test, it was known that the sig. (2-tailed) is 0.000 <0.05, then Ho is rejected and Ha is accepted. So it can be concluded that there is an average difference between pre-test and post-test concept mastery, which means that there is an influence of V-Lab application in increasing mastery of core physics concepts. The data shows that the Virtual Laboratory is effectively used to improve mastery of the concepts of core physics courses.
Deck crane merupakan alat yang digunakan untuk proses menaikkan muatan ke atas kapal (loading) ataupun proses bongkar muatan dari kapal ke darat (discharging). Masalah yang sering ditemui adalah kerusakan motor listrik pada deck crane dan kerusakan pada wire deck crane. Tujuan penelitian ini yaitu untuk mengetahui penyebab kerusakan pada pada motor listrik deck crane dan mengetahui penyebab kerusakan pada wire deck crane. Metode pendekatan yang digunakan adalah deskriptif kualitatif. Dari hasil penelitian diperoleh hasil bahwa kerusakan pada motor listrik disebabkan oleh 3 hal yaitu: motor listrik mengalami kepanasan (overheating), cooling fan pada motor listrik kotor, getaran pada shaft motor listrik yang tidak stabil. Kerusakan pada wire crane kapal disebabkan oleh wire yang rusak, pengurangan diameter pada wire crane, korosi, perubahan bentuk wire rope dan kerusakan akibat panas yang menyebabkan usia pemakaian dari wire crane tersebut menjadi berkurang
Fatigue is a protection mechanism to avoid further damage, so that recovery occurs after a break. Fatigue (fatigue) is a subjective feeling. Work fatigue is a condition that is accompanied by a decrease in efficiency and the need to work. the effects of excessive activity result in fatigue. lack of knowledge results in excessive effects of fatigue. the way to overcome this problem is by utilizing an electrocardiograph (ECG) sensor. The use of electrocardiograph sensors (ECG) to determine the fatigue of smartphone users based on heart rate rhythm. The sensor used as a fatigue detection is the AD8232 type. The result of this process is safe or unsafe when using a smartphone. When BPM is worth 60 <BPM <120, the condition of smartphone users is safe, whereas when BPM <60 or BPM> 120, the condition of smartphone users is unsafe. Based on the results that have been tested on four samples there was a change in heart rate rhythm (BPM) during one hour and fifteen minutes of testing.
The purpose of this study is to analyze the strategic position of the Bumi Silampari Islamic High School (STAI) in Lubuklinggau City, South Sumatra, at this time and its development in the future. This research method uses a SWOT approach with a total of 13 respondents who are elements of the leadership of STAI Bumi Silampari, based on data described from the external environment and internal environment, the results show that the position of Islamic religious high schools is currently in the quadrant (IA) graph. Cartesius is a stable growth strategy, meaning that STAI Bumi Silampari can grow according to its capabilities, even though business opportunities are still available, however, the growth of STAI Bumi Silampari cannot be fast, but gradually, because the relatively large opportunities are exploited by competitors. , STAI Bumi Silampari must maximize the strengths it currently has, by identifying business opportunities and exploiting them by improving infrastructure and physical facilities of buildings and public facilities, as well as improving the quality of lecturers and appropriate compensation, as a strategy to maintain reliable human resources
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