Indonesian Journal of Applied Research (IJAR)最新文献

GEOGRAPHICALLY WEIGHTED REGRESSION WITH DIFFERENT KERNELS: APPLICATION TO MODEL POVERTY 不同核的地理加权回归:在贫困模型中的应用

Indonesian Journal of Applied Research (IJAR) Pub Date : 2023-04-18 DOI: 10.30997/ijar.v4i1.283

N. Sunusi, Aan Subarkah

引用次数: 0

FUNCTIONAL RESPONSE OF PREDATOR Paederus sp. (COLEOPTERA: STAPHYLINIDAE) 捕食者拟蚊的功能反应(鞘翅目:拟蚊科)

Indonesian Journal of Applied Research (IJAR) Pub Date : 2023-04-18 DOI: 10.30997/ijar.v4i1.257

A. W. Sumah

引用次数: 0

COMPARISON OF FEATURE SELECTION BASED ON COMPUTATION TIME AND CLASSIFICATION ACCURACY USING SUPPORT VECTOR MACHINE 基于计算时间和分类精度的支持向量机特征选择比较

Indonesian Journal of Applied Research (IJAR) Pub Date : 2023-04-18 DOI: 10.30997/ijar.v4i1.252

S. K. Nasib, Fadilah Istiqomah Pammus, Nurwan, La Ode Nashar

{"title":"COMPARISON OF FEATURE SELECTION BASED ON COMPUTATION TIME AND CLASSIFICATION ACCURACY USING SUPPORT VECTOR MACHINE","authors":"S. K. Nasib, Fadilah Istiqomah Pammus, Nurwan, La Ode Nashar","doi":"10.30997/ijar.v4i1.252","DOIUrl":"https://doi.org/10.30997/ijar.v4i1.252","url":null,"abstract":"The goal of this research to compare Chi-Square feature selection with Mutual Information feature selection based on computation time and classification accuracy. In this research, people's comments on Twitter are classified based on positive, negative, and neutral sentiments using the Support Vector Machine method. Sentiment classification has the disadvantage that it has many features that are used, therefore feature selection is needed to optimize a sentiment classification performance. Chi-square feature selection and mutual information feature selection are feature selections that both can improve the accuracy of sentiment classification. How to collect the data on twitter taken using the IDE application from python. The results of this study indicate that sentiment classification using Chi-Square feature selection produces a computation time of 0.4375 seconds with an accuracy of 78% while sentiment classification using Mutual Information feature selection produces an accuracy of 80% with a required computation time of 252.75 seconds. So that the conclusion are obtained based on the computational time aspect, the Chi-Square feature selection is superior to the Mutual Information feature selection, while based on the classification accuracy aspect, the Mutual Information feature selection is more accurate than the Chi-Square feature selection. The recommendations for further research can use mutual information feature selection to get high accuracy results on sentiment classification","PeriodicalId":381629,"journal":{"name":"Indonesian Journal of Applied Research (IJAR)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123102675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CHARACTERISTICS OF GROUND COFFEE QUALITY ON VARIATIONS IN TEMPERATURE AND ROASTING TIME FOR ROBUSTA COFFEE (Coffea Canephora PIERRE EX A.FROEHNER) GREEN BEAN 罗布斯塔咖啡(Coffea Canephora PIERRE EX A.FROEHNER)绿豆在温度和烘焙时间变化下的磨碎咖啡品质特征

Indonesian Journal of Applied Research (IJAR) Pub Date : 2023-04-18 DOI: 10.30997/ijar.v4i1.284

A. A. Oksari, Neneng Hasanah, I. F. Wanda, R. Sutamihardja

{"title":"CHARACTERISTICS OF GROUND COFFEE QUALITY ON VARIATIONS IN TEMPERATURE AND ROASTING TIME FOR ROBUSTA COFFEE (Coffea Canephora PIERRE EX A.FROEHNER) GREEN BEAN","authors":"A. A. Oksari, Neneng Hasanah, I. F. Wanda, R. Sutamihardja","doi":"10.30997/ijar.v4i1.284","DOIUrl":"https://doi.org/10.30997/ijar.v4i1.284","url":null,"abstract":"Robusta coffee beans dominate coffee plantations in Indonesia because they have superior properties and are fast-growing. Bogor Regency is one of the largest coffee producers in West Java and was selected to supply robusta coffee for this study. However, the quality of coffee beans still needs to improve. The quality of the coffee beans can be enhanced if the roasting process is carried out at the right temperature and roasting time. This study aims to determine the temperature and duration of roasting the optimum robusta coffee and roasted coffee grounds compared to the quality of branded coffee on the market. Robusta coffee beans roast using a stainless steel skillet with an iron thermometer. The temperature and roasting duration is 170° C, 180° C, and 190° C for 10 and 15 minutes. The robusta ground coffee from Cipanas was analyzed and compared with the branded coffee. Phytochemical tests showed robusta ground coffee samples containing secondary metabolites of alkaloids, flavonoids, saponins, and tannins. The temperature and roasting time of Bogor robusta coffee at 190 °C for 10 minutes gave the best results for several test parameters (moisture content, caffeine levels, pH, coffee content, ash content, and microbial contamination). The quality results obtained are to the requirements set by SNI 01-3542-2004. The quality of roasted ground coffee is the same as branded ground coffee. It is recommended that coffee producers use optimal roasting temperature and duration to improve the quality of their coffee products","PeriodicalId":381629,"journal":{"name":"Indonesian Journal of Applied Research (IJAR)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114497516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

OXALIC ACID PRODUCTION OF BANANA PEEL (Musa textilia) THROUGH OPTIMUM TEMPERATURE AND TIME with ALKALINE METHOD 最佳温度、最佳时间碱法生产香蕉皮草酸的研究

Indonesian Journal of Applied Research (IJAR) Pub Date : 2023-04-18 DOI: 10.30997/ijar.v4i1.270

Y. Kurniati, Irvan Adhin Cholilie, Paramita Setyaningrum, F. Martak, D. Anggraini, Viqorul Ahmad Haryadi

{"title":"OXALIC ACID PRODUCTION OF BANANA PEEL (Musa textilia) THROUGH OPTIMUM TEMPERATURE AND TIME with ALKALINE METHOD","authors":"Y. Kurniati, Irvan Adhin Cholilie, Paramita Setyaningrum, F. Martak, D. Anggraini, Viqorul Ahmad Haryadi","doi":"10.30997/ijar.v4i1.270","DOIUrl":"https://doi.org/10.30997/ijar.v4i1.270","url":null,"abstract":" \u0000The chemical compound has the formula H2C2O4 is oxalic acid. Every year especially, the industrial sector in Indonesia requires oxalic acid made, which increases annually. Oxalic acid is valuable because it may be used to clean (rust remover), make colors, protect metals from corrosives, and other things. Alkaline melting is one way for creating oxalic acid from cellulose-containing materials. Other methods include hydrolysis, CaCl2 precipitation, and acidification using H2SO4. In Indonesia, cellulose-containing materials are widely available. Banana peels are one of the substances that contain cellulose. In addition to identifying the properties of oxalic acid produced using the alkaline smelting process, this study attempts to find the best temperature and duration for producing oxalic acid from discarded banana peels. The ideal conditions include a temperature of 60°C, a period of 60 minutes, and a yield of 5.42%. Oxalic acid from banana peel waste has the properties of having a melting point, hydroxyl, C=C, C-O, and C-H group absorption at a wave number of 104.6 oC, 3422.06 cm-1, 1682.48 cm-1, 1103.42 cm-1, and 666.36 cm-1 respectively. Based on the strain vibration results from the FTIR test and melting point test.","PeriodicalId":381629,"journal":{"name":"Indonesian Journal of Applied Research (IJAR)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127298319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PECTIN EXTRACTION FROM AMBON BANANA (Musa paradisiaca var. sapientum) PEEL AND ITS APPLICATION FOR GUMMY JELLY 香蕉果皮中果胶的提取及其在软糖中的应用

Indonesian Journal of Applied Research (IJAR) Pub Date : 2023-04-18 DOI: 10.30997/ijar.v4i1.243

Muhammad Fakih Kurniawan, Distya Riski Hapsari, R. S. Nurlaela, Nuraimy Citra

{"title":"PECTIN EXTRACTION FROM AMBON BANANA (Musa paradisiaca var. sapientum) PEEL AND ITS APPLICATION FOR GUMMY JELLY","authors":"Muhammad Fakih Kurniawan, Distya Riski Hapsari, R. S. Nurlaela, Nuraimy Citra","doi":"10.30997/ijar.v4i1.243","DOIUrl":"https://doi.org/10.30997/ijar.v4i1.243","url":null,"abstract":"Considered a waste, the peel of the Ambon banana (Musa paradisiaca var. sapientum) contains an appreciable amount of pectin. Pectin can be used to produce gummy jelly products with the addition of carrageenan as a stabilizer. The manufacture of gummy jelly must consider a good proportion of pectin and carrageenan. This study aimed to extract pectin from Ambon banana peel and determine the best formulation of gummy jelly incorporated with the pectin and carrageen as a gelling agent. Pectin was extracted from Ambon banana peel and then analyzed for yield, ash content, equivalent weight, methoxyl content, galacturonic content, and degree of esterification. Gummy jelly was made with various levels of pectin (0.5%, 1%, 1.5%, 2%) and carrageenan (1%, 1.5%, 2%). The product was analyzed for water content, ash content, reducing sugar content, sensory quality test, and hedonic test. The characteristics of pectin, i.e., moisture content, ash content, galacturonic acid content, methoxyl content, and the degree of esterification, were compared to IPPA (International Pectin Producer Association) standard. Meanwhile, the gummy jelly samples were confirmed to comply with the requirements of SNI Soft Candy 3547-2-2008 for water content, ash content, and reduced sugar content. In addition, we found that a higher concentration of pectin in the formulation led to a lower chewiness, decreasing the panelist’s preference. Considering the chemical and sensory properties of the candy, the most desirable formulation was achieved at the ratio of pectin and carrageenan 1.5%:2%. Pectin from banana peels can be used as an ingredient in gummy jelly. This work suggested further studies on the candy's textural properties, such as gumminess and chewiness.","PeriodicalId":381629,"journal":{"name":"Indonesian Journal of Applied Research (IJAR)","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132961568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THE EXPERIMENTAL OF IMPACT OF ADDITIONAL MAGNETIC FIELDS AND NITROGEN PRESSURE ON OLIVE OIL DROPLET COMBUSTION 附加磁场和氮气压力对橄榄油液滴燃烧影响的实验研究

Indonesian Journal of Applied Research (IJAR) Pub Date : 2023-04-02 DOI: 10.30997/ijar.v4i1.280

D. Perdana

{"title":"THE EXPERIMENTAL OF IMPACT OF ADDITIONAL MAGNETIC FIELDS AND NITROGEN PRESSURE ON OLIVE OIL DROPLET COMBUSTION","authors":"D. Perdana","doi":"10.30997/ijar.v4i1.280","DOIUrl":"https://doi.org/10.30997/ijar.v4i1.280","url":null,"abstract":"This experiment studies the impact of a magnetic field of attraction and various nitrogen pressures in the combustion chamber on the characteristics of the flame. To replace depleted fossil fuels, the usage of vegetable oil is crucial. This research aims to probe the droplet combustion of olive oil on evolution, temperature, height, and ignition delay. The camera's high speed is 120 frames per second front-facing camera records the process from the start flamed until it has extinguished. A droplet of olive oil is placed on a type K thermocouple between two magnet rods in a nitrogen-pressurized chamber—three variations of nitrogen pressure in the combustion chamber, which included 0.5, 1, and 1.5 bar. The results found that the nitrogen pressure of 0.5 bar led to evolution, and the flame stability was more stable. Moreover, the highest temperature and flame delay was shorter than the pressures of 1 bar and 1.5 bar. At a pressure of 0.5 bar, the flame evolution was 1200 milliseconds, the maximum temperature was 741 °C, and the ignition delay of 4506 milliseconds was shorter than the other two pressures. That occurred due to high nitrogen pressure inhibiting the collision reaction of the olive oil fuel vapor with air. Meanwhile, adding an attraction magnetic field can centralize oxygen and fuel molecules in the area of the reaction zone, resulting in rapid combustion and a shorter flame delay change.","PeriodicalId":381629,"journal":{"name":"Indonesian Journal of Applied Research (IJAR)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123308701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GROWTH AND PRODUCTION OF WATER SPINACH ( Ipomea aquatica Forsk.) IN VARIOUS TYPES OF HYDROPONIC NUTRITION SYSTEM NFT (Nutrient Film Technique) 水菠菜的生长与生产营养膜技术在各类水培营养系统中的应用

Indonesian Journal of Applied Research (IJAR) Pub Date : 2022-05-17 DOI: 10.30997/ijar.v3i1.194

Payumi, Oktavianus Lumban Tobing, N. Yulianti, N. Rochman

{"title":"GROWTH AND PRODUCTION OF WATER SPINACH ( Ipomea aquatica Forsk.) IN VARIOUS TYPES OF HYDROPONIC NUTRITION SYSTEM NFT (Nutrient Film Technique)","authors":"Payumi, Oktavianus Lumban Tobing, N. Yulianti, N. Rochman","doi":"10.30997/ijar.v3i1.194","DOIUrl":"https://doi.org/10.30997/ijar.v3i1.194","url":null,"abstract":"Efforts to increase the production of kale with a hydroponic cultivation system, the addition of nutrients is absolutely necessary for both macro and micronutrients. In addition to using AB mix nutrients, the use of other alternative fertilizers in hydroponic cultivation needs to be a big concern so that it can suppress the use of inorganic fertilizers. The purpose of this study was to determine the effect of giving various types of nutrient compositions AB mix and cow urine on the growth and yield of water spinach plants with the Nutrient Film Technique (NFT) hydroponic system . The design used in this study was a single factor randomized block design (RAK) with 4 levels of treatment of various types of hydroponic nutrients consisting of N 1 (100% AB mix ), N 2 (75% AB mix + 25% Cow Urine), N 3 (50% AB mix + 50% Cow Urine), and N 4 (25% AB mix + 75% Cow Urine). The results of this study showed that the provision of various nutritional compositions significantly affected the growth and productivity of kale except for the variable number of books. Plant water spinach given nutritional composition N 4 (25% AB mix + 75% of cow urine) showed a markedly lower in all the observed variables, while the growth and productivity of water spinach best shown in the nutritional composition of 100% AB mix but not significantly different the nutritional composition treatment was 75% AB mix + 25% cow urine and 50% AB mix + 50% cow urine. The results of this study also show that the use of cow urine has not been able to replace the use of AB mix nutrition.","PeriodicalId":381629,"journal":{"name":"Indonesian Journal of Applied Research (IJAR)","volume":"353 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115922640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IN SILICO, TO DETERMINE THE ACTIVE COMPOUNDS OF BLACK TEA AND TURMERIC IN INCREASING THE ACTIVITY OF THE ENZYME SOD 在硅片上，确定红茶和姜黄的活性化合物在增加酶sod的活性

Indonesian Journal of Applied Research (IJAR) Pub Date : 2022-05-12 DOI: 10.30997/ijar.v3i1.187

A. Hasan, M. Safithri, Aziz Syamsul Huda, Rini Kurniasih

{"title":"IN SILICO, TO DETERMINE THE ACTIVE COMPOUNDS OF BLACK TEA AND TURMERIC IN INCREASING THE ACTIVITY OF THE ENZYME SOD","authors":"A. Hasan, M. Safithri, Aziz Syamsul Huda, Rini Kurniasih","doi":"10.30997/ijar.v3i1.187","DOIUrl":"https://doi.org/10.30997/ijar.v3i1.187","url":null,"abstract":"Damage to cells caused by stress can be reduced by the presence of antioxidants, one of which is Superoxide dismutase (SOD). The role of the active ingredients of black tea and turmeric will be studied using the in-silico method to identify the active compounds as components in SOD activation. The bioavailability and toxicity of the active compounds of black tea and turmeric were studied and followed by molecular docking and virtual games. The parameters studied are Gibbs's free energy (∆G) and binding site similarity (BSS). The results were analyzed using Gibbs's free energy (∆G) and binding site similarity (BSS) parameters. It was found that those that could increase the activity of Cu/Zn SOD enzymes were Epicatechin gallate (black tea) and curcumin (turmeric), with values of -9.5 and -7.4 Kcal/mol and the same BSS value of 81.8%. The control ligand used was beta amyrin. According to Lipinski's rules, Epicatechin gallate and curcumin compounds can be absorbed well and are safe for consumption. This study concludes that Epicatechin gallate, an active compound of black tea, and curcumin, an active compound of turmeric rhizome, have the best potential to increase the activity of Cu/Zn SOD enzymes based on the results of virtual screening and molecular docking. Epicatechin gallate and curcumin are predicted to be well absorbed by the body because they qualify Lipinski's rules and are not toxic and safe for consumption.","PeriodicalId":381629,"journal":{"name":"Indonesian Journal of Applied Research (IJAR)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126514599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

HEART RATE DETECTION OF STRESS LEVELS FOR PREGNANT WOMEN 孕妇压力水平的心率检测

Indonesian Journal of Applied Research (IJAR) Pub Date : 2022-05-12 DOI: 10.30997/ijar.v3i1.182

Y. Wahyuni, Muhammad Abdulrohman Pany

引用次数: 0