Ultima Computing : Jurnal Sistem Komputer最新文献

One-Phase Smart Switch using OpenCV Hand Gesture Recognition 使用 OpenCV 手势识别的单相智能开关

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2024-07-20 DOI: 10.31937/sk.v16i1.3633

Mochamad Rizal Fauzan, Saiqa Fatur Khairi, Neneng Puspita Kaniarudi, Silmi Ath Thahirah Al Azhima, Nurul Fahmi Arief Hakim, Iwan Kustiawan, Mariya Al Qibtya, S. Elvyanti

{"title":"One-Phase Smart Switch using OpenCV Hand Gesture Recognition","authors":"Mochamad Rizal Fauzan, Saiqa Fatur Khairi, Neneng Puspita Kaniarudi, Silmi Ath Thahirah Al Azhima, Nurul Fahmi Arief Hakim, Iwan Kustiawan, Mariya Al Qibtya, S. Elvyanti","doi":"10.31937/sk.v16i1.3633","DOIUrl":"https://doi.org/10.31937/sk.v16i1.3633","url":null,"abstract":"The need for simplicity in various activities encourages further technological development. One of them is a system to turn lights on and off with just a hand gesture. This hand gesture-based One-phase smart switch uses OpenCV, Arduino Nano, relays, and webcam cameras to recognize hand gestures. Static finger movements are used as buttons to turn on the lights. The results show that the algorithm used has high reliability with a precision score of 0.90, sensitivity of 0.90, accuracy of 0.96, and F1-score of 0.90. The accuracy of the system is affected by light intensity, distance, and hand tilt angle. At a light intensity of 70 LUX, the accuracy reaches 100%, while at 40 LUX the accuracy ranges from 98-99%. A distance of 30-60 cm gave the best accuracy of 100%, but decreased at longer distances. A hand tilt of 0° gives 100% accuracy, while at an angle of 60° the accuracy drops significantly, especially for the fifth finger with 64% accuracy. The average response time of the light to finger movement is 0.133 seconds. This device can recognize a variety of finger patterns well, thus meeting the desired needs.","PeriodicalId":243787,"journal":{"name":"Ultima Computing : Jurnal Sistem Komputer","volume":"122 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141819960","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

Gross Error Detection and Data Correction in IIoT-Based Data Center Cooling System 基于物联网的数据中心冷却系统中的总错误检测和数据校正

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2024-07-15 DOI: 10.31937/sk.v16i1.3695

Abdul Hamid, E. M. Budi, E. Ekawati

引用次数: 0

Air Quality Monitoring System Design Based on Wireless Sensor Network Integrated with the Internet of Things 基于与物联网集成的无线传感器网络的空气质量监测系统设计

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2024-07-15 DOI: 10.31937/sk.v16i1.3694

Irvan Budiawan, Danu Febri Wigianto, Bagus Wicaksono, Arif Rohman Hakim

{"title":"Air Quality Monitoring System Design Based on Wireless Sensor Network Integrated with the Internet of Things","authors":"Irvan Budiawan, Danu Febri Wigianto, Bagus Wicaksono, Arif Rohman Hakim","doi":"10.31937/sk.v16i1.3694","DOIUrl":"https://doi.org/10.31937/sk.v16i1.3694","url":null,"abstract":"Government and officials set rules to keep the air clean and healthy. To accommodate this, an efficient air quality monitoring system is required. Real-time monitoring is crucial for observing air quality. This allows for immediate action if air quality declines. However, current systems often rely on just one measurement point, risking inaccurate results due to rapid pollutant dispersion. To overcome this problem, researchers propose designing an air quality monitoring system based on a wireless sensor network. Sensor nodes will be installed at various points within the area to be monitored, forming a connected sensor network using the ESP-Now protocol. The data obtained from each node will be sent to the base station, then the data will be transmitted via the Message Queuing Telemetry Transport (MQTT) protocol using the internet network. Thus, this design produces a wireless sensor network that is integrated with the internet of things (IoT). The advantages of the IoT system include ease of data storage and accessibility that can be accessed from anywhere as long as it is connected to the internet and has appropriate authorization.","PeriodicalId":243787,"journal":{"name":"Ultima Computing : Jurnal Sistem Komputer","volume":" 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141833049","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

State-Feedback Control Design for the Cannon Stability System 火炮稳定系统的状态反馈控制设计

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2023-06-30 DOI: 10.31937/sk.v15i1.3212

A. Muharom

引用次数: 0

Comparison of FIR and IIR Filters for Audio Signal Noise Reduction 用于音频信号降噪的FIR和IIR滤波器的比较

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2023-06-30 DOI: 10.31937/sk.v15i1.3171

Sancho Harmalita Liu, Nabila Husna Sabrina, Hardson Hardson

引用次数: 0

Development of an Internet of Things-Based Garbage Collection Robot 基于物联网的垃圾收集机器人的研制

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2023-06-30 DOI: 10.31937/sk.v15i1.2863

P. Liana, Rahmat Irsyada, Roihatur Rohmah

{"title":"Development of an Internet of Things-Based Garbage Collection Robot","authors":"P. Liana, Rahmat Irsyada, Roihatur Rohmah","doi":"10.31937/sk.v15i1.2863","DOIUrl":"https://doi.org/10.31937/sk.v15i1.2863","url":null,"abstract":"The problem of garbage is not a new thing from the past until now, garbage is still the center of attention and a prolonged problem because of the various impacts of the problems that are caused and felt. Many factors are the cause of the increasing amount of garbage every day, including the lack of self-awareness about maintaining cleanliness and disposing of garbage in its place. This study aims to develop an IoT-based garbage collection robot. The method in developing this garbage collection robot is using the Fuzzy Mamdani method. The IoT-based garbage collection robot is designed using the Arduino Uno microcontroller as well as the Node MCU ESP 8266, HC-SR04 sensor, DHT11 sensor, SG90 Servo motor, DC motor and L298N motor driver. The way this robot works is to detect the distance with the HC-SR04 sensor as a distance data input then processed by the Arduino microcontroller and then the SG90 servo motor will move to clamp the garbage automatically and for the robot using control via a smartphone to be directed to the destination garbage. The results of this study are that the robot can clamp or pick up garbage with a distance of less than 5 cm and can control the speed of a DC motor using the fuzzy Mamdani method.","PeriodicalId":243787,"journal":{"name":"Ultima Computing : Jurnal Sistem Komputer","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123187007","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

Soil Moisture Control System for Lettuce Seeds: Time-based Alternative Approach 生菜种子土壤水分控制系统:基于时间的替代方法

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2023-06-30 DOI: 10.31937/sk.v15i1.3214

F. Mangkusasmito, Ageng Rilla Aldonanda, D. Y. Tadeus

引用次数: 0

Performance Comparison of YOLOv5 and YOLOv8 Architectures in Human Detection using Aerial Images YOLOv5和YOLOv8架构在航空图像人体检测中的性能比较

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2023-06-30 DOI: 10.31937/sk.v15i1.3204

Indri Purwita Sary, Safrian Andromeda, Edmund Ucok Armin

引用次数: 0

Simple and Accurate Instrumentation Device to Detect Loose-End Defective Cigarettes 简易准确的松尾缺陷卷烟检测仪器装置

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2023-06-30 DOI: 10.31937/sk.v15i1.3236

D. Y. Tadeus, F. Mangkusasmito, A. B. Putranto, Muhamad Ramzy Raihan

引用次数: 0

Water Flow & Temperature Control to Increase Extraction Yield of Light-roasted Coffee Beans 控制水流和温度以提高轻焙咖啡豆的萃取率

Ultima Computing : Jurnal Sistem Komputer Pub Date : 2022-12-28 DOI: 10.31937/sk.v14i2.2810

Samuel Hutagalung

{"title":"Water Flow & Temperature Control to Increase Extraction Yield of Light-roasted Coffee Beans","authors":"Samuel Hutagalung","doi":"10.31937/sk.v14i2.2810","DOIUrl":"https://doi.org/10.31937/sk.v14i2.2810","url":null,"abstract":"Using light-roasted coffee beans for brewing espresso poses a general problem for pump-based espresso machines. Soluble in light-roasted coffee beans is more challenging to extract and requires a higher EY percentage because it has a relatively higher acidity level than dark-roasted coffee beans. The extraction range of 18% - 22% in light-roasted coffee beans for espresso brewing with an 8% - 12% TDS is qualitatively considered insufficient to produce espresso with a balanced taste. To improve the extraction ability of the espresso machine on coffee soluble. We design two features that hypothetically can solve the problem: Temperature Control Module to increase water temperature stability as a replacement for the thermostat, and Flow Control Module to regulate the speed of the vibration pump by adjusting the voltage resistance to reduce the water pressure/ flow rate used during the initial extraction at the preinfusion phase. Based on the results of trials using an espresso machine that has added temperature and flow control modules, there is an increase in the average percentage of extraction compared to the results of trials using stock machines; the average extraction percentage increased by 4.83 points. Qualitatively, this increase of %EY also significantly impacts the espresso taste, which tasted very sour and unbalanced, became relatively more balanced and comfortable to enjoy.","PeriodicalId":243787,"journal":{"name":"Ultima Computing : Jurnal Sistem Komputer","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121458505","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