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BATAS MEDAN LEMAH PADA GRAVITASI f(T) 重力极限f(T)
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.25-30
Tika Restianingsih
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引用次数: 0
KARAKTERISASI SIFAT ELEKTROKIMIA ELEKTRODA KARBON AKTIF BERBASIS LIMBAH SABUT KELAPA MUDA MENGGUNAKAN SEPARATOR MEMBRAN KULIT TELUR AYAM 使用鸡蛋蛋壳壳膜膜膜,对活化的碳电极的活性化学特性进行描述
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.31-34
Angela Carolina Simanjuntak, Awitdrus Awitdrus
The supercapacitor is an energy storage device with an electrochemical characteristic that can provide high energy and power density. The supercapacitor cell consists of a current collector, electrode, electrolyte, and separator. This study used young coconut fiber biomass as a supercapacitor electrode, H 2 SO 4 as an electrolyte, 316L stainless steel as a current collector, and chicken eggshell membrane as a separator. The fabrication of electrode carbon made from young coco fiber begins with the pre-carbonization process, chemical activation using 0.5M KOH, carbonization process using N 2 gas at a temperature of 600 °C, and physical activation using CO 2 gas at a temperature of 750 °C. Analysis of electrochemical characteristics using cyclic voltammetry method resulting in a specific capacitance value of 197.05 F/g for a scan rate of 1 mV/s, 157.215 F/g for a scan rate of 2 mV/s, and 129.42 F/g for scan rate of 5 mV/s.
超级电容器是一种具有电化学特性的能量存储装置,可以提供高能量和功率密度。超级电容器电池由集流器、电极、电解液和分离器组成。本研究采用椰子幼纤维生物质作为超级电容器电极,h2so4作为电解液,316L不锈钢作为集电流体,鸡蛋壳膜作为分离器。以嫩椰子纤维为原料制备电极炭,首先进行预碳化、0.5M KOH化学活化、600℃氮气碳化、750℃co2气体物理活化。利用循环伏安法分析电化学特性,得到扫描速率为1 mV/s时的比电容值为197.05 F/g,扫描速率为2 mV/s时的比电容值为157.215 F/g,扫描速率为5 mV/s时的比电容值为129.42 F/g。
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引用次数: 0
SIKLIS VOLTAMETRI SEL SUPERKAPASITOR DARI BIOMASSA PELEPAH SALAK
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.19-24
Rakhmawati Farma, Amalia Apriliani Putri, Irma Apriyani
Snake fruit midrib (SFM) biomass has the potential to be used as a precursor material for making carbon electrodes because it has a high lignocellulosic content for supercapacitor applications. Carbon electrodes were made from snake fruit midrib biomass using a pre-carbonization process at 200 °C, chemical activation with 0.1 M KOH as an activating agent, a carbonization process with temperature variations of 500 °C, 600 °C, and 700 °C using N 2 gas, and a physical activation process at 800 °C with CO 2 gas. Thermogravimetric analysis shows the thermal resistance temperature of carbon powder is 317.1 °C. Analysis of the electrochemical properties of supercapacitor cells from snake fruit midrib obtained specific capacitance values of 123.23 F/g, 169.05 F/g, and 213.27 F/g for samples SFM-500, SFM-600, and SFM-700, respectively. The results showed that 700 °C was the best carbonization temperature for carbon electrodes from snake fruit midrib.
蛇果中脉(SFM)生物质具有作为制造碳电极的前体材料的潜力,因为它具有用于超级电容器应用的高木质纤维素含量。以蛇果中脉生物质为原料,采用200℃预碳化、0.1 M KOH活化、500℃、600℃、700℃氮气碳化、800℃co2气体物理活化等工艺制备碳电极。热重分析表明,碳粉的热阻温度为317.1℃。通过对蛇果中脉制备的超级电容器电池的电化学性能分析,SFM-500、SFM-600和SFM-700样品的比电容值分别为123.23、169.05和213.27 F/g。结果表明,700℃是蛇果中脉碳电极的最佳碳化温度。
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引用次数: 0
ANALISA SENSITIVITAS SENSOR TGS PADA HIDUNG ELEKTRONIK UNTUK IDENTIFIKASI GANODERMA DI BAGIAN AKAR KELAPA SAWIT 分析TGS传感器在电子鼻子上的敏感度,以识别油棕根部的甘草瘤
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.1-6
Mhd Feri Desfri, M. Minarni, Dewi Laila Sari, Dewi Anjarwati Mahmudah, Ihsan Okta Harmailil, I. Cahyadi
Palm oil is one of the main commodities for Indonesia. It is important to identify the disease-causing the decline in productivity. Root rot disease that causes total damage to oil palm plants due to fungal infection G. boninense sp has volatile organic compounds that can be detected using an electronic nose. The electronic nose system is designed with 6 sensor arrays, namely TGS 2612, TGS 822, TGS 2611, TGS 2610, TGS 813, and TGS 2620 which are sensitive to certain VOC compounds. The sample used was infected and uninfected oil palm seedlings aged 4 months. The detection process is carried out on plant roots. Python program is used as a data acquisition system in voltage retrieval. The obtained voltage is processed and further analyzed using a trapezoidal area to determine the sensor response in the identification of Ganoderma. The results of processing using a trapezoidal plane show that TGS 2611 has a very good response. The TGS 2611 sensor has a higher trapezoidal area in identifying oil palm plants that are attacked by Ganoderma with 4 classifications, namely healthy, moderate, sick, and severe.
棕榈油是印尼的主要商品之一。确定导致生产力下降的原因是很重要的。由于真菌感染导致油棕植物完全受损的根腐病G. boninense sp含有挥发性有机化合物,可以用电子鼻检测到。电子鼻系统设计了6个传感器阵列,分别是TGS 2612、TGS 822、TGS 2611、TGS 2610、TGS 813和TGS 2620,这些传感器阵列对某些VOC化合物敏感。所使用的样品是4个月大的感染和未感染油棕幼苗。检测过程是在植物根系上进行的。在电压检索中使用Python程序作为数据采集系统。对得到的电压进行处理,并使用梯形区域进一步分析,以确定传感器在灵芝识别中的响应。用梯形平面处理的结果表明,TGS 2611具有很好的响应性。TGS 2611传感器在识别受灵芝侵害的油棕植物时有较高的梯形面积,分为健康、中度、病态、重度4个等级。
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引用次数: 0
PENGGUNAAN METODE GEOLISTRIK RESISTIVITAS KONFIGURASI SCHLUMBERGER UNTUK MENGETAHUI LAPISAN STRUKTUR LITOLOGI BAWAH TANAH DI TAMAN ILMU UNIVERSITAS RIAU 施伦贝谢对排版结构的使用,以了解廖内大学科学系的地下岩层结构
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.35-38
Aprianturi Rega, Usman Malik
Research has been carried out at the Science Park, Riau University to determine the layers of underground lithological structures using the one-dimensional Schlumberger configuration Geoelectric resistivity method. Research data processing is done using Software Progress. The results of data processing show that lanes 1 and 2 consists of layers of alluvium, sand, gravel, and clay. On track 1, the highest soil layer resistivity value of 863.14 m is interpreted as a layer of sand and gravel at a depth of 2.28 - 31.12 m, while the smallest is 226.90 m which can be interpreted as a layer of clay at a depth of 0.68 - 1.28 m. On track 2, the highest soil layer resistivity value of 1027.83 m is interpreted as a layer of sand and gravel at a depth of 0.28 - 1.15 m, while the smallest is 188.08 m interpreted as a clay layer at a depth of 0 - 0.28 m. The highest and lowest resistivity values tend to be identified as sand, gravel, and clay, respectively.
在廖内大学科学园进行了研究,使用一维斯伦贝谢配置地电阻率法确定地下岩性结构的层数。研究数据处理使用Software Progress完成。数据处理结果表明,巷1和巷2由冲积层、砂层、砾石层和粘土层组成。在轨道1上,最高的土层电阻率值为863.14 m,可解释为深度为2.28 ~ 31.12 m的砂砾层;最小的土层电阻率值为226.90 m,可解释为深度为0.68 ~ 1.28 m的粘土层。在轨道2上,最高的土层电阻率值为1027.83 m,解释为深度为0.28 ~ 1.15 m的砂砾层,最小的土层电阻率值为188.08 m,解释为深度为0 ~ 0.28 m的粘土层。最高和最低的电阻率值往往分别被识别为砂、砾石和粘土。
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引用次数: 0
PEMBUATAN ELEKTRODA KARBON DARI BIOMASSA SABUT KELAPA MUDA DENGAN AKTIVATOR KOH SEBAGAI APLIKASI SEL SUPERKAPASITOR 制造年轻椰壳生物质能的碳电极,具有高活动电容器应用程序
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.45-50
Zurya Hanifa, Awitdrus Awitdrus
The supercapacitor is a storage device consisting of carbon electrodes, separator, electrolyte, and current collector. Carbon electrodes made from young coconut coir biomass with a mass ratio of 1:0.20 KOH activator have been successfully fabricated with a carbonization temperature of 550 °C and a physical activation temperature of 750 °C. Characterization of physical properties by measuring the density value showed that before and after pyrolysis decreased due to KOH activating agent. Furthermore, the electrochemical characterization using the voltammetry cyclic method showed the specific capacitance value to the scanning rate, where the highest specific capacitance value was 163.14 F/g with a scanning rate of 1 mV/s.
超级电容器是一种由碳电极、分离器、电解液和集流器组成的存储装置。在炭化温度为550℃,物理活化温度为750℃的条件下,成功地制备了以幼龄椰壳生物质为原料,KOH活化剂质量比为1:0.20的碳电极。通过测定密度值表征物性,发现热解前后由于KOH活化剂的作用而有所降低。利用伏安循环法进行电化学表征,得到了扫描速率下的比电容值,扫描速率为1 mV/s时,比电容值最高为163.14 F/g。
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引用次数: 0
ANALISA DISTRIBUSI DOSIS PADA FANTOM HOMOGEN DAN INHOMOGEN DENGAN SIMULASI MONTE CARLO 与蒙特卡洛仿真同源和异同同剂量的分布分析
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.39-44
Sitti Yani
Monte Carlo simulation with electron gamma shower (EGSnrc) code can produce 3-dimensional dose distribution data. The percent depth dose curve (PDD), dose profile, and isodose curve can be extracted through this 3-dimensional data. In this study, a photon source with an energy of 2 MeV is placed at the source to surface distance (SSD) from the phantom surface by adjusting the collimator aperture which is used to control the size of the exposure field. The SSD distance was varied at a distance of 50 cm, 70 cm, 80 cm, 90 cm, and 100 cm. The size of the exposure area is also varied by 2 × 2 cm 2 , 5 × 5 cm 2 , 7 × 7 cm 2 , and 10 × 10 cm 2 . The dose distribution analysis was carried out on homogeneous phantoms containing water and inhomogeneous phantoms containing tissue/bone/lung/bone/tissue material. The PDD curve and dose profile represent dose changes with depth and x or y direction, respectively. The PDD curve on a homogeneous phantom shows an increase in the value on the surface of the phantom to the depth with the maximum dose. This curve then decreases gradually with increasing depth. Inhomogeneous ghosts show spikes in the border region of the two media with different densities. This is due to the contribution of the backscattered electrons generated by the bone media and into the tissue media. This phenomenon is also seen in the isodose curve for inhomogeneous phantoms.
利用电子伽玛阵雨(EGSnrc)程序进行蒙特卡罗模拟可以得到三维剂量分布数据。通过该三维数据可以提取出百分比深度剂量曲线(PDD)、剂量剖面和等剂量曲线。在本研究中,通过调节准直器孔径来控制曝光场的大小,将能量为2 MeV的光子源放置在离幻影表面的源面距离(SSD)处。SSD距离分别为50 cm、70 cm、80 cm、90 cm、100 cm。曝光区域的大小也随2 × 2 cm 2、5 × 5 cm 2、7 × 7 cm 2和10 × 10 cm 2而变化。对含水的均质模型和含组织/骨/肺/骨/组织材料的非均质模型进行剂量分布分析。PDD曲线和剂量曲线分别表示剂量随深度和x或y方向的变化。均匀模体上的PDD曲线显示,模体表面的值随着最大剂量的增加而增加。该曲线随着深度的增加而逐渐减小。非均匀鬼在密度不同的两种介质的边界区域呈现出尖峰。这是由于骨介质和组织介质产生的背散射电子的贡献。这种现象也见于非均匀幻像的等剂量曲线。
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引用次数: 0
ANALISA SIFAT FISIS NANOPARTIKEL ZnO DI-DOPING Ag YANG DISINTESIS MENGGUNAKAN METODE BIOSINTESIS 利用生物合成方法合成ZnO - dag纳米粒子的裂变性质
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.7-10
Rita Meldayani, Iwantono Iwantono, Ari Sulistyo Rini, Yolanda Rati
Nanotechnology is developing rapidly with a variety of synthetic materials, apart from the perceived work efficiency, which is also prioritized in terms of safety and non-toxicity. The synthesis that has the potential to be carried out based on these criteria is the type of Ag-doped ZnO nanoparticles. ZnO nanoparticles were prepared by a biosynthetic method using pineapple peel extract as a reducing agent. This study aims to look at the effect of adding Ag to ZnO nanoparticles. The percentage variation of Ag to ZnO is 1%, 3%, and 5%. The pineapple peel extract was mixed with 0.05 M (Zn(NO 3 ) 2 )·6H 2 O and 0.05 M AgNO 3 precursor solutions. The solution was heated at 80 °C for 2 hours. The results of the biosynthesis were characterized using Spectroscopy UV-Vis, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The UV-Vis spectrum informs that strong absorption occurs at wavelengths below 400 nm. The maximum absorption is shown by sample ZnO:Ag 3% and the minimum absorption is shown by the pure ZnO sample. XRD characterization showed that the formation of seven diffraction peaks occurs at a diffraction angle (2θ) of: 31.729°; 34,397°; 36,214°; 47,467°; 56,541°; 62.831°; and 67.922°. The SEM results showed surface morphology of ZnO and ZnO:Ag 1% samples are floral and spherical, while ZnO:Ag 3% and ZnO:Ag 5% samples are coral rocks.
纳米技术随着各种合成材料的迅速发展,除了感知工作效率外,还优先考虑安全性和无毒性。基于这些标准有可能进行的合成是ag掺杂ZnO纳米颗粒的类型。以菠萝皮提取物为还原剂,采用生物合成方法制备了氧化锌纳米颗粒。本研究旨在观察在ZnO纳米颗粒中添加Ag的效果。Ag对ZnO的变化百分比分别为1%、3%和5%。将菠萝皮提取物与0.05 M (Zn(no3) 2)·6h2o和0.05 M agno3前驱体溶液混合。溶液在80℃下加热2小时。利用紫外可见光谱(UV-Vis)、x射线衍射(XRD)和扫描电镜(SEM)对生物合成结果进行了表征。紫外可见光谱表明,强吸收发生在波长低于400纳米。ZnO:Ag为3%的样品吸光度最大,纯ZnO样品吸光度最小。XRD表征表明,7个衍射峰的形成发生在31.729°的衍射角(2θ)处;34397°;36214°;47467°;56541°;62.831°;和67.922°。SEM结果表明,ZnO和ZnO:Ag 1%样品的表面形貌为花状和球形,而ZnO:Ag 3%和ZnO:Ag 5%样品的表面形貌为珊瑚岩石。
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引用次数: 0
PENGGUNAAN PEMODELAN SUMBER PLASMA HELIUM PADA KEADAAN SETIMBANG UNTUK APLIKASI PLAK GIGI 在牙菌斑应用的同步状态下使用氦气等离子体资源建模
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.11-18
Nandita Devira, Toto Saktioto
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引用次数: 0
IDENTIFIKASI HEWAN BERDASARKAN POLA AKUSTIK DENGAN PRINSIP EKSTRAKSI WAVELET DAN KLASIFIKASI MULTI-LABEL JARINGAN SYARAF TIRUAN 动物识别是基于声学模式的提取过程原理和模拟神经组织的多标签分类
Pub Date : 2022-03-31 DOI: 10.31258/jkfi.19.1.51-56
Defrianto Defrianto, Titrawani Titrawani, L. Umar, Vepy Asyana
An acoustic identification and classification system of frogs has been designed based on the principle of wavelet extraction and label classification using an artificial neural network (ANN). This system consists of electronic detection for frog audio as well as an interface using the MATLAB 2018b software as an ANN provider device. As input for the neural network, 5 types of frogs were used, namely the rock frog (Limnonectes macrodon), the blentung frog (Kaloula baleata), the hip frog (Limnonectesblythii), the rice field frog (Fejervarya cancrivora), and the trench frog. frog. frog (Fejervarya limnocharis). ), each with 12 sound samples. Before being inserted into the neural network, 3 levels of sound samples were extracted and denoised using wavelet symlet 3. Furthermore, in the neural network training process, 3 validation samples and 3 test samples were used. After training, the artificial neural network was able to identify the type of frog being tested.
基于小波提取和人工神经网络标签分类的原理,设计了蛙类声音识别分类系统。该系统由青蛙音频的电子检测和使用MATLAB 2018b软件作为神经网络提供设备的接口组成。神经网络的输入使用了5种蛙类,分别是岩蛙(Limnonectes macrodon)、棱蛙(Kaloula baleata)、臀蛙(Limnonectesblythii)、稻田蛙(Fejervarya cancrivora)和沟蛙。青蛙。蛙(Fejervarya limnocharis)。,每个有12个声音样本。在插入神经网络之前,提取3级声音样本并使用小波符号3去噪。此外,在神经网络训练过程中,使用了3个验证样本和3个测试样本。经过训练,人工神经网络能够识别被测试青蛙的类型。
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引用次数: 0
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Komunikasi Fisika Indonesia
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