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Classification of skin cancer images by applying simple evolving connectionist system Al-Khowarizmi Al-Khowarizmi; Suherman Suherman
IAES International Journal of Artificial Intelligence (IJ-AI) Vol 10, No 2: June 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijai.v10.i2.pp421-429

Simple evolving connectionist system (SECoS) is one of data mining classification techniques that recognizing data based on the tested and the training data binding. Data recognition is achieved by aligning testing data to trained data pattern. SECoS uses a feedforward neural network but its hidden layer evolves so that each input layer does not perform epoch. SECoS distance has been modified with the normalized Euclidean distance formula to reduce error in training. This paper recognizes skin cancer by classifying benign malignant skin moles images using SECoS based on parameter combinations. The skin cancer classification has learning rate 1 of 0.3, learning rate 2 of 0.3, sensitivity threshold of 0.5, error threshold of 0.1 and MAPE is 0.5184845 with developing hidden node of 23. Skin cancer recognition by applying modified SECoS algorithm is proven more acceptable. Compared to other methods, SECoS is more robust to error variations.

Design and simulation hybrid filter for 17 level multilevel inverter Marshal Andrea Hutabarat; Syafruddin Hasan; Ali Hanafiah Rambe; Suherman Suherman
Bulletin of Electrical Engineering and Informatics Vol 9, No 3: June 2020
Publisher : Institute of Advanced Engineering and Science

The increasing of renewable energy applications such as solar cells, wind power, ocean thermal and HVDC (high voltage direct current) cause increment in the use of the inverter circuit. Harmonics that are generated by the inverter have negative impacts on the electrical equipment; harmonics cause excessive heat and may shorten the life of electrical equipment. A multilevel inverter is an arranged of cascaded inverters which aims to reduce total harmonic distortion (THD). This paper proposes the design of 17 levels of a single-phase cascaded multilevel inverter with a hybrid filter insertion. By using PSIM simulator, the hybrid filter is proven reducing THD better than single pulse width modulation (SPWM) inverter. Installation of the hybrid filter is able to fix a maximum of 0.23% THDv and a maximum of 1.05% THDi. Hybrid filter installation reduces the value of THD to comply with IEEE 519-2014 standard.

WiFi-Friendly Building to Enable WiFi Signal Indoor Suherman Suherman
Bulletin of Electrical Engineering and Informatics Vol 7, No 2: June 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v7i2.871

The 802.11 networks (wireless fidelity (WiFi) networks) have been the main wireless internet access infrastructure within houses and buildings. Besides access point placement, building architectures contribute to the WiFi signal spreading. Even dough WiFi installation in buildings becomes prevalent; the building architectures still do not take WiFi-friendliness into considerations. Current research on building and WiFi are on access point location, location based service and home automation. In fact, the more friendly the building to WiFi signal, the more efficient the 802.11 based wireless infrastructure. This paper introduces the term of WiFi-friendly building by considering signal propagations, the obstacle impact, as well as proposing an ornament-attaced reflector and a hole-in-the-wall structure to improve WiFi signal distribution. Experiment results show that obstacle materials made of concrete reducing WiFi signal the most, followed by metal and wood. Reflecting materials are able to improve the received signal level, for instance, the implemented ornament-attached reflector is able improving the received signal up to 6.56 dBm. Further, the hole-in-the-wall structure is successfully increasing WiFi signal up to 2.3 dBm.

WiFi-Friendly Building to Enable WiFi Signal Indoor Suherman Suherman
Bulletin of Electrical Engineering and Informatics Vol 7, No 2: June 2018
Publisher : Institute of Advanced Engineering and Science

The 802.11 networks (wireless fidelity (WiFi) networks) have been the main wireless internet access infrastructure within houses and buildings. Besides access point placement, building architectures contribute to the WiFi signal spreading. Even dough WiFi installation in buildings becomes prevalent; the building architectures still do not take WiFi-friendliness into considerations. Current research on building and WiFi are on access point location, location based service and home automation. In fact, the more friendly the building to WiFi signal, the more efficient the 802.11 based wireless infrastructure. This paper introduces the term of WiFi-friendly building by considering signal propagations, the obstacle impact, as well as proposing an ornament-attaced reflector and a hole-in-the-wall structure to improve WiFi signal distribution. Experiment results show that obstacle materials made of concrete reducing WiFi signal the most, followed by metal and wood. Reflecting materials are able to improve the received signal level, for instance, the implemented ornament-attached reflector is able improving the received signal up to 6.56 dBm. Further, the hole-in-the-wall structure is successfully increasing WiFi signal up to 2.3 dBm.

ANALISIS KUALITAS TRANSMISI VIDEO DENGAN DECODABLE FRAME RATE Muhammad Mulia Maulana; Suherman Suherman
Singuda ENSIKOM Vol 14, No 39 (2016)
Publisher : Singuda ENSIKOM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.156 KB)

Meningkatnya kebutuhan masyarakat akan informasi video, dibutuhkan sistem transmisi video yang baik. Kinerja transmisi video dapat dievaluasi melalui model matematis. Tulisan ini membandingkan hasil percobaan transmisi video pada jaringan 802.11 dan hasil analisis model Decodable Frame Rate. Decodable Frame Rate menganalisis kinerja transmisi video yang menggunakan nilai probabilitas terdekodekannya data video yang diterima. Hasil percobaan dengan jumlah 6 user diperoleh jumlah frame yang decodable adalah 34% dari jumlah frame yang dikirimkan. Sedangkan dari hasil analisis model Decodable Frame Rate diperoleh jumlah frame yang decodable adalah 3% dari jumlah frame yang dikirimkan. Jumlah frame yang decodable dipengaruhi oleh nilai packet loss ketika video ditransmisikan. Semakin besar jumlah user maka nilai packet loss juga akan semakin meningkat dan frame yang decodable akan semakin kecil sehingga kualitas video yang diterima juga semakin menurun.

WiFi-Friendly Building to Enable WiFi Signal Indoor Suherman Suherman
Bulletin of Electrical Engineering and Informatics Vol 7, No 2: June 2018
Publisher : Institute of Advanced Engineering and Science

The 802.11 networks (wireless fidelity (WiFi) networks) have been the main wireless internet access infrastructure within houses and buildings. Besides access point placement, building architectures contribute to the WiFi signal spreading. Even dough WiFi installation in buildings becomes prevalent; the building architectures still do not take WiFi-friendliness into considerations. Current research on building and WiFi are on access point location, location based service and home automation. In fact, the more friendly the building to WiFi signal, the more efficient the 802.11 based wireless infrastructure. This paper introduces the term of WiFi-friendly building by considering signal propagations, the obstacle impact, as well as proposing an ornament-attaced reflector and a hole-in-the-wall structure to improve WiFi signal distribution. Experiment results show that obstacle materials made of concrete reducing WiFi signal the most, followed by metal and wood. Reflecting materials are able to improve the received signal level, for instance, the implemented ornament-attached reflector is able improving the received signal up to 6.56 dBm. Further, the hole-in-the-wall structure is successfully increasing WiFi signal up to 2.3 dBm.

Desain Protokol Jaringan untuk Komunikasi Multimedia melalui WiMAX Suherman Suherman
Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer Vol 3, No 2 (2014): Edisi Desember 2014
Publisher : Fakultas Teknik Elektro - Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/setrum.v3i2.501

Tulisan ini membahas protokol jaringan pada lapisan transport serta perubahan desain yang ada untuk meningkatkan kualitas transmisi multimedia melalui perangkat orthogonal frequency division multiplexing (OFDM). Kualitas transmisi video melalui udara sangat rentan terhadap error transmisi, yang menyebabkan terjadinya packet loss. Penggunaan protokol reliable seperti transmission control protocol (TCP) mampu mengurangi loss, tetapi meningkatkan delay yang signifikan. Oleh karenanya dibutuhkan protokol yang dapat mengurangi loss tanpa menambah delay. Artikel ini mengajukan perubahan desain pada protokol jaringan unreliable UDP melalui mekanisme retransmisi dan cross-layer. Melalui simulasi, metode yang diajukan terbukti mampu mengurangi packet loss UDP sebesar rata-rata 6,5 %, menekan delay UDP hingga 18-37% serta meningkatkan kualitas video yang diterima berkisar 21,3-184,3%.

Realisasi Sistem Switch Lampu Penerangan Ruangan Otomatis Untuk Meningkatkan Efisiensi Energi Listrik Bakhtiar Bakhtiar; Suherman Suherman
Jurnal Arus Elektro Indonesia Vol 1 No 2 (2015)
Publisher : Fakultas Teknik, Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Penghematan energi listrik sangat bergantung pada perilaku dan kesadaran manusia. Sekitar 80% keberhasilan kegiatan konservasi energi ditentukan oleh faktor manusia, sedangkan 20% lagi bergantung teknologi dan peralatan. Salah satu solusi alternatif dalam permasalahan ini adalah menerapkan sistem otomasi sehingga secara otomatis menghidupkan dan mematikan lampu ruangan dengan mendeteksi keberadaan manusia di dalam ruangan. Dalam penulisan ini melakukan realisasi rancangan agar dapat dimanfaatkan oleh masyarakat sebagai fitting ekstensi otomatis dalam upaya penghematan daya listrik. Penelitian ini juga membandingkan disipasi daya yang timbul saat lampu tidak menyala dengan lampu sensor gerak yang ada di pasaran. Realisasi rancangan terdiri dari dua sistem yaitu, menggunakan sensor PIR terintegrasi pewaktu NE555 dan sensor PIR terintegrasi mikrokontroler Atmega 8 SMD. Hasil yang dicapai adalah, disipasi daya lampu sensor gerak type LED di pasaran adalah 6,2 Watt, lampu penerangan ruangan otomatis terintegrasi pewaktu IC555 lebih efisien 79,26% dibandingkan lampu sensor gerak di pasaran, lampu penerangan ruangan otomatis terintegrasi mikrokontroler atmega 8 lebih efisien 60,39% dibandingkan lampu sensor gerak di pasaran. Kata Kunci: Efisiensi, Lampu Otomatis, Light Fitting, Mikrokontroler, Sensor gerak, Timer

Analysis and Implementation of Honeyd as a Low-Interaction Honeypot in Enhancing Security Systems Abdul Muin Nasution; Muhammad Zarlis; Suherman Suherman
Randwick International of Social Science Journal Vol. 2 No. 1 (2021): RISS Journal, January
Publisher : RIRAI Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47175/rissj.v2i1.209

Every computer connected to a wide computer network is vulnerable to the occurrence of data, information, resources and services that exist in the system from actions such as intrusion, wiretapping, theft and misuse of important data to damage to network systems, which are carried out by irresponsible intruders, wiretapping, theft and misuse of important data by individuals, groups, within a company/government agency or private sector, even damage to computer network systems may occur. in a company, which is done by an intruder or attacker who is not responsible. Honeypot honeyd is a method that can be applied, implemented in medium to large scale companies, especially those that have implemented computer-based systems and technology, to prevent, anticipate bad actions before they occur and take quick action when bad impacts occur. Honeypot honeyd with low-interaction, which is to interact indirectly with the attacker, because honeyd positions itself as a bait or a shadow server that is deliberately attacked so that the results of the attack can be known and analyzed. In this research, honeyd honeypot is a shadow server that resembles a real server, which has several services along with ports that are deliberately opened for attack. The results of this research can be seen that there is an infiltration or direct attack, seen from the increase in network traffic above normal on the monitor system, and also can be seen log files from Honeyd in detail what the attackers have done or are currently doing to be analyzed and then take precautions, anticipation, socialization of security in carrying out activities that are directly related to the outside world through the network, improving both servers, network systems and existing services. Thus the honeyd honeypot can help save important data, resources and can improve computer network security systems.

3D Modeling Parallel Coupled-Line Bandpass Filter Based on Coplanar Waveguide MMIC Multilayer Technology Rizqi Eka Putri; Emerson Pascawira Sinulingga; Suherman Suherman
TELKA - Jurnal Telekomunikasi, Elektronika, Komputasi dan Kontrol Vol 5, No 1 (2019): TELKA
Publisher : Jurusan Teknik Elektro UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/telka.v5n1.24-30

Electromagnetic modeling technique on monolithic microwave integrated circuit (MMIC) coplanar waveguide (CPW) multilayer have been developed to accurately model the Parallel Coupled-Line Bandpass Filter. The 3D modeling technique shows the simulation results that are optimum. Several simulation steps have been demonstrated and compared on the design of Parallel Coupled-Line Bandpass Filters. Based on the 3D modeling, S11-Return Loss and S21-Insertion Loss of -22.6 dB and and 2.94 dB are obtained respectively. In addition, it is shown the best frequency response from the design of the Parallel Coupled-Line Bandpass Filter.

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