Sistem Penilaian Otomatis Jawaban Esai Pada Elearning belajardisini.com

AbstrakPada penelitian sebelumnya dihasilkan sebuah media pembelajaran berbasis gamification, yaitu memadukan konsep game dalam sebuah elearning. Pada sistem tersebut untuk koreksi jawaban uraian pendek(esai) masih dilakukan secara manual. Bertambahnya jumlah pelajar dan banyaknya ujian mengakibatkan pengajar harus meluangkan waktu untuk menilai jawaban soal ujian, sehingga penggunaan e-learning dan tanpa e-learning dari sisi efisiensi waktu tidak ada perbedaan. Oleh karena itu diperlukan sistem penilaian otomatis untuk jawaban esai. Penelitian sebelumnya didapat algoritma cosine similarity yang sesuai dengan kebutuhan sistem elearning tersebut. Dari hasil penelitian tersebut dikembangkan sistem (automated essay scooring )AES dengan algorima cosine similarity dan dilakukan uji perfoma sistem berdasarkan penggunaan CPU, Memori dan  page load time. Proses uji performa server dari dua jenis soal yang diujikan disimpulkan bahwa semakin besar pengguna yang mengakses sistem maka semakin besar juga CPU Usage yang dibutuhkan yaitu paling besar adalah 0,2556 %. Untuk pengujian page load time dan memory usage tidak ditemukan perbedaan yang cukup signifikan ketika sistem digunakan oleh satu pengguna maupun banyak pengguna yaitu antara 0,208392 detik sampai 0,406842 detik untuk page load time dan antara 1,49 % sampai 1,56 % untuk memory usage.Kata kunci: automated essay scooring, cosine similarity, elearningAbstractIn a previous research developed a elearning system based on gamification concept, which combines the concept of games in an elearning system. In that system for correction the answer of essay exam) is still done manually. Increasing the number of students and the number of exam makes teachers having to take time to assess the answers to the exam, so using  elearning and without elearning in asessment there is no different esspisially in term time efficiency. Therefore we need an automatic scoring system for the essay. Previous research, said cosine similarity algorithm that fits the needs of the e-learning system. From the results of these studies was developed automated essay scooring system using cosine similarity and examine the performance of the system based on the use of CPU, memory and page load time. The test result shown server performance of the two types of questions that tested concluded that the users accessing the system, the greater the required CPU Usage is at most 0.2556%. For the test page load time and memory usage found no significant difference when the system is used by a single user or multiple users is between 0.208392 seconds to 0.406842 seconds to page load time and between 1.49% to 1.56% for memory usage.Kata kunci: automated essay scooring, cosine similarity, elearnin

A Heartbeat Classifier for Continuous Prediction Using a Wearable Device

Heartbeat monitoring may play an essential role in the early detection of cardiovascular disease. When using a traditional monitoring system, an abnormal heartbeat may not appear during a recording in a healthcare facility due to the limited time. Thus, continuous and long-term monitoring is needed. Moreover, the conventional equipment may not be portable and cannot be used at arbitrary times and locations. A wearable sensor device such as Polar H10 offers the same capability as an alternative. It has gold-standard heartbeat recording and communication ability but still lacks analytical processing of the recorded data. An automatic heartbeat classification system can play as an analyzer and is still an open problem in the development stage. This paper proposes a heartbeat classifier based on RR interval data for real-time and continuous heartbeat monitoring using the Polar H10 wearable device. Several machine learning and deep learning methods were used to train the classifier. In the training process, we also compare intra-patient and inter-patient paradigms on the original and oversampling datasets to achieve higher classification accuracy and the fastest computation speed. As a result, with a constrain in RR interval data as the feature, the random forest-based classifier implemented in the system achieved up to 99.67% for accuracy, precision, recall, and F1-score. We are also conducting experiments involving healthy people to evaluate the classifier in a real-time monitoring system

An Event-based Middleware for Syntactical Interoperability in Internet of Things

Internet of Things (IoT) connecting sensors or devices that record physical observations of the environment and a variety of applications or other Internet services. Along with the increasing number and diversity of devices connected, there arises a problem called interoperability. One type of interoperability is syntactical interoperability, where the IoT should be able to connect all devices through various data protocols. Based on this problem, we proposed a middleware that capable of supporting interoperability by providing a multi-protocol gateway between COAP, MQTT, and WebSocket. This middleware is developed using event-based architecture by implementing publish-subscribe pattern. We also developed a system to test the performance of middleware in terms of success rate and delay delivery of data. The system consists of temperature and humidity sensors using COAP and MQTT as a publisher and web application using WebSocket as a subscriber. The results for data transmission, either from sensors or MQTT COAP has a success rate above 90%, the average delay delivery of data from sensors COAP and MQTT below 1 second, for packet loss rate varied between 0% - 25%. The interoperability testing has been done using Interoperability assessment methodology and found out that ours is qualified

Bridging IoT infrastructure and cloud application using cellular-based internet gateway device

An Internet of Things (IoT) middleware can solve interoperability problem among “things” in IoT infrastructure by collecting data. However, the sensor nodes’ data that is collected by the middleware cannot be directly delivered to cloud applications since the sensor nodes and the middleware are located in intranet. A solution to this problem is an Internet Gateway Device (IGD) that retrieves data from the middleware in intranet then forwards them to cloud applications in the internet. In this study, an IGD based on cellular network is proposed to provide wide-coverage internet connectivity. Two test scenarios were conducted to measure delay and throughput between the IGD and the cloud application; using data from DHT22 sensor and image sensor respectively. The results of the first test scenario using DHT22 sensor show that the average delay is under 5 seconds and the maximum throughput is 120 bps, while the second one using image sensor concludes that the average delay is 595 seconds and the maximum throughput is 909 bps

Pemodelan dan Analisis Wireless Mesh Network dengan Arsitektur Publish-Subscribe dan Protokol MQTT

AbstrakAkses terhadap informasi menjadi kebutuhan yang sangat penting bagi manusia. Namun, tidak semua daerah memiliki akses yang layak terhadap informasi terutama daerah terpencil dikarenakan keterbatasan infrastruktur komunikasi. Teknologi wireless mesh network (WMN) dapat menjadi salah satu solusi untuk mengatasi masalah keterbatasan infrastruktur tersebut. Untuk meningkatkan performa WMN, maka perlu adanya rancangan mekanisme pengiriman informasi yang efisien. Ide penelitian ini pada dasarnya adalah memberikan solusi pengiriman informasi menggunakan arsitektur publish subscribe. Protokol publish subscribe yang digunakan adalah protokol MQTT (Message Queuing Telemetry Transport). Pada penelitian ini dilakukan pengujian terhadap Quality of Service seperti throughput, delay, jitter, dan packet loss untuk keseluruhan node. Pada pengujian QoS arsitektur WMN maupun MTQQ menunjukan bahwa kualitas layanan dipengaruhi oleh jarak,jumlah node yang dilewati dan material yang menghalangi. Seperti yang ditunjukan pada hasil pengujian antara node yang dihalangi tiga tembok beton, packet lossnya mencapai 88.8% dan delaynya sebesar 2.493,79 ms.Kata kunci: wireless, mesh network, publish and subscribeAbstractHas an access to the information becomes a very important requirement for humans. However, not all areas are have adequate access to information, especially in rural areas due to limited communication infrastructures. Wireless mesh network (WMN) technology may be can act as one alternative solution to overcome the problems. To improve the performance of WMN, it is necessary to design efficient information delivery mechanism. The idea of this research is basically giving information delivery solutions using the publish subscribe architecture. Publish-subscribe protocol used here is the MQTT protocol (Message Queuing Telemetry Transport). In this research, the Quality of Service testing such as throughput, delay, jitter, and packet loss for the entire node. On testing and MTQQ WMN QoS architecture shows that quality of service is affected by distance, number of nodes that pass and blocking material. As shown in the test results between nodes that hindered three concrete walls, packet lossnya reached 88.8% and the delay amounted to 2493.79 ms.Keywords: wireless, mesh network, publish and subscrib

Middleware for Network Interoperability in IoT

One solution for interoperability issue in IoT is a middleware which is competent on resolving the problems of syntactical, semantic, and network interoperability. In previous study, a middleware capable of addressing semantic and syntactical interoperability challenges has been developed, yet has not responded to network interoperability matter. In this paper we continue our previous research by adding BLE and 6LoWPAN features to the middleware's communication media, so it may communicate with various devices. Interoperability test results show that the middleware is capable of responding to network interoperability challenges and able to receive data from multiple nodes simultaneously

Information and Data Distribution System for Rural Areas of Indonesia

Abstract. Internet becomes critical infrastructure in the distribution of information. The information is used for decision making and ensure the success of human activities. However, the distribution of information in rural Indonesia is inconvenient, because the digital communication infrastructure (internet) doesn’t cover all areas in Indonesia. This problem causes the digital divide in Indonesia. This study proposes communications infrastructure and data transfer mechanism or media sharing that can be applied to a variety of rural areas conditions in Indonesia, which has limited communications infrastructure. The approach is to build low power digital carrier devices in the form of minicomputer and utilize Delay or Disruptions Tolerant Network (DTN) architecture. Testing results in the digital carrier node show that the data is successfully delivered. Keywords: Rural Area, Mini-PC, Delay Tolerant Networ

Pengembangan Infrastruktur Komunikasi Multigroup Pada Wi-Fi Direct

AbstrakWi-Fi Direct merupakan alternatif lain dari penerapan opportunistic network selain ad- hoc. Wi-Fi Direct dapat mudah ditemukan pada perangkat android keluaran terbaru. Hal ini dapat mengatasi permasalahan ad – hoc yang tidak bisa digunakan oleh perangkat android keluaran terbaru. Namun Wi-Fi Direct memilki keterbatasan dikarenakan arsitektur dari Wi-Fi Direct yang terpusat sehingga jangkauan jaringannya tidak sama dengan ad - hoc. Oleh karena itu pada penelitian ini dilakukan pengembangan arsitektur komunikasi multigroup pada Wi-Fi Direct khususnya perangkat bergerak android dengan melibatkan jembatan antar group menggunakan Legacy Client serta menguji kinerja dari infratruktur yang dibangun. Hasil dari pengujian kinerja arsitektur multigroup Wi-Fi Direct adalah berupa waktu delay penemuan perangkat, pembentukan group, pengiriman pesan group dan pengiriman pesan multigroup. Berdasarkan hasil penelitian berdasarkan skenario yang dilakukan dapat disimpulkan bahwa pemindaian perangkat mencatat waktu tercepat yaitu 4.041 detik dan waktu terlama 17.184 detik, pembentukan group mencatat waktu tercepat 1.524 detik dan waktu terlama 2.511 detik, pengiriman pesan group mencatat waktu tercepat 2.637 detik dan waktu terlama 6.126, dan untuk pengiriman pesan multigroup tidak dapat dilakukan. Komunikasi antar Group Owner tidak dapat dilakukan secara langsung karena terjadi konflik alamat IP.Kata kunci: Wi-Fi Direct, Group Wi-Fi Direct, Multigroup Wi-Fi Direct, Opportunistic Network, Android. AbstractWi-Fi Direct is an alternative for the application of opportunistic network in addition to ad-hoc. Wi-Fi Direct can be easily found on the latest android device. It can overcome the problems of ad - hoc that can not be used by the latest android device. However Wi-Fi Direct have the limitations due to the architecture of Wi-Fi Direct centralized so that network coverage is not the same as the ad - hoc. Therefore, in this research, the development of communications architecture Multigroup on Wi-Fi Direct, especially mobile android involving bridges between groups using the Legacy Client and test the performance of the infrastructure. The results of the performance testing architecture Multigroup Wi-Fi Direct is a form of time delay device discovery, group formation, group messaging and message delivery Multigroup. Based on the results of research based on scenarios that can be concluded that the scanning device is recording the fastest time is 4.041 seconds and the longest time 17.184 seconds, the formation of the group recorded the fastest time of 1.524 seconds and the longest time 2.511 seconds, sending the message group recorded the fastest time of 2.637 seconds and the longest time 6.126, and for message delivery Multigroup can not be done. Communication between Group Owner can not be done directly because of an IP address conflict.Keywords: Wi-Fi Direct, Group Wi-Fi Direct, Multigroup Wi-Fi Direct, Opportunistic Network, Android

Implementasi Mekanisme End-To-End Security pada IoT Middleware

Pada penelitian sebelumnya telah dikembangkan sebuah middleware dengan pendekatan event-driven yang mampu mendukung interoperabilitas berbagai macam perangkat sensor pada lingkungan IoT. Namun, skema komunikasi pada middleware tersebut masih terdapat celah keamanan dan menimbulkan ancaman berupa eavasdropping. Solusi dari permasalahan ini adalah menerapakan mekanisme end-to-end security. Dalam penelitian ini dilakukan penerapan algoritme kriptografi AES-CBC 128 pada komunikasi node sensor ke middleware dan mekanisme TLS pada komunikasi middleware dengan aplikasi berbasis IoT. Hasil yang didapat end-to-end security berbasis kriptografi pada pub/sub dapat menjamin kerahasiaan data dengan enkripsi payload akan tetapi topik masih terlihat, sedangkan TLS/SSL menjamin kerahasiaan seluruh data yang dikirim. Penggunaan mekanisme ini tidak berdampak signifikan pada delay pengiriman data, yaitu masih dibawah 1 detik AbstractAn IoT middleware for handling interoperability is proposed in previous works. However, a vulnerability that can lead to the eavesdropping attack exist. there is no security mechanism in the communication system among middleware with other parties like node sensors and subscribers. This research implements the end to end security to the existing IoT middleware.  AES-CBC 128 is used to secure communication between sensor nodes to middleware and used TLS/SLL between middleware and subscriber. The results show both mechanisms can securely communication between middleware and other parties, but AES-CBS can only secure data payload, not entire data. This mechanism has no significant impact on the delay transmission, which is still under 1 secon

Rancang Bangun Aplikasi Pengukur Kesehatan Fungsi Paru Manusia Memanfaatkan Microphone Pada Smartphone

ABSTRAK Penyakit Paru Obstruktif Kronik (PPOK) adalah penyakit yang ditandai dengan hambatan aliran udara di saluran nafas yang tidak sepenuhnya reversibel. Hambatan aliran udara ini bersifat progresif dan berhubungan degan respon inflamasi paru terhadap partikel gas beracun atau berbahaya [2][16]. Hasil penelitian pada bulan Januari-Desember 2010 menyebutkan bahwa PPOK menduduki urutan ke-3 dari penyakit paru terbanyak yang ada di RS Paru Batu Malang. Sedangkan di  RSU Dr. Saiful Anwar Malang  menduduki urutan ke-5. The Burden Of Disease Study dibawah naungan WHO menyatakan bahwa pada tahun 2030 PPOK akan menempati peringkat ke-3 penyebab kematian di dunia [5][15][16]. Sebagai solusi terhadap masalah tersebut yaitu dengan membangun sebuah aplikasi pengukur kesehatan  fungsi paru manusia memanfaatkan microphone pada smartphone”. Guna mengetahui gangguan ventilasi paru, monitoring pengobatan, dan menilai perkembangan fungsi paru. Media smartphone dipilih karena memiliki teknologi Microphone API yang digunakan untuk menangkap input berupa rekaman suara hembusan napas pengguna. Dan mayoritas masyarakat telah melilikinya. Dari hasil pengujian validasi dapat disimpulkan bahwa aplikasi pengukur kesehatan paru manusia pada media smartphone berhasil diimplementasikan dengan memanfaatkan teknologi microphone. Dari hasil pengujian akurasi yang dilaksanakan di Rumah Sakit Saiful Anwar Kota Malang dapat disimpulkan bahwa ditemukan selisih akurasi Prediksi Nilai Acuan Normal sebesar FEV1 = 0,11 liter; FVC = 0,152432432 liter; FEV1/FVC = 4,742432432 %. Dan selisih akurasi Hasil Pengukuran sebesar FEV1 = -1,545945946 liter; FVC = -2,892432432 liter; FEV1/FVC = 11,52243243 %. Kata Kunci: Penyakit Paru Obstruktif Kronik, Microphone, Smartphone.   ABSTRACT Chronic Obstructive Pulmonary Disease (COPD) is a disease characterized by air flow resistance in the airway that is not fully reversible. This air flow resistance is progressive and, relating to pulmonary inflammatory response to toxic gases or dangerous particles [2] [16]. The results of the study in January-December 2010 states that COPD ranks 3rd from most existing lung disease Pulmonary Hospital Batu Malang. Meanwhile, in Hospital Dr Saiful Anwar-5 ranks. The Burden Of Disease Study under the auspices of the WHO stated that by 2030 COPD will be ranked as the third leading cause of death in the world [5] [15] [16]. As a solution to these problems is to build an application measuring the health of human lung function utilizing a microphone on a smartphone ". In order to determine pulmonary ventilation disorders, treatment monitoring, and assessing the development of lung function. Media Smartphone Microphone technology chosen because it has an API that is used to capture the input of the user breath sound recordings. And the majority of people have melilikinya. From the results of the validation testing can be concluded that the application of measuring the health of the human lung on a smartphone media successfully implemented by utilizing the microphone. Accuracy of test results conducted at Saiful Anwar Hospital Malang can be concluded that the prediction accuracy differences were found Normal Reference Values for FEV 1 = 0.11 liters; FVC = 0.152432432 liters; FEV 1 / FVC = 4.742432432%. And the difference in the accuracy of measurement results for FEV1 = -1.545945946 liter; FVC = -2.892432432 liter; FEV 1 / FVC = 11.52243243%. Keyword: Chronic Obstructive Pulmonary Disease, Microphone, Smartphone