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Angkasa: Jurnal Ilmiah Bidang Teknologi
Published by Institut Teknologi Dirgantara Adisutjipto
ISSN : 20859503     EISSN : 25811355     DOI : 10.28989/angkasa
Core Subject : Science,
Computer Science & IT
Arjuna Subject : -
Articles 281 Documents
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KLASIFIKASI SENTIMEN PADA TWITTER DENGAN NAIVE BAYES CLASSIFIER Suryono, Sigit; Utami, Ema; Luthfi, Emha Taufiq
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 1 (2018): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Klasifikasi sentimen merupakan salah satu cabang dari Text mining. Klasifikasi sentimen dapat menjadi sesuatu yang penting dalam proses evaluasi terhadap sebuah topik permasalahan. Tujuan utama dari klasifikasi sentimen adalah untuk mencari tahu polaritas dari sentimen positif, negatif dan netral. Klasifikasi sentimen salah satunya dapat diperoleh melalui tweet yang ada pada Twitter. Dalam tulisan ini, tweet yang berhubungan dengan kata kunci yang dicari dihimpun dengan menggunakan tools yaitu API Twitter. Data yang didapat dari proses penghimpunan akan diolah dengan menggunakan Natural Language Toolkit yang berjalan diatas bahasa pemrograman Python. Data selanjutnya akan dilakukan klasifikasi sentimen dengan menggunakan Naive Bayes untuk melihat sentimen yang dihasilkan. Dari proses klasifikasi yang telah dilakukan akan diukur tingkat akurasi. Dari hasil uji coba sebanyak 3 kali, didapatkan tingkat akurasi pada percobaan pertama 64.95%, kedua 66.36% dan ketiga 66.79% Hasil lain yang didapatkan dari proses klasifikasi yaitu Sentimen positif  28% sentimen negatif 20% dan sentimen netral 52%. Berdasarkan hasil persentase kelas sentimen, sentimen neutral merupakan sentimen yang paling banyak apabila dikaitkan dengan topik Presiden Joko Widodo dan Pemerintahannya.
PERANCANGAN SISTEM STANDARISASI DESA WISATA KABUPATEN BANTUL DENGAN MODEL SISTEM PENGUKURAN KINERJA BALANCED SCORECARD GUNA PENGUATAN INDUSTRI PARIWISATA DAERAH Zabidi, Yasrin; Suhardiwamo, Suhardiwamo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Bantul regency until now has approximately 36 villages wisata. Standarisasi tourist village needs to be done, which is the standard tourist village which is categorized as an embryo, develops, and advanced. These standards can be used by Disbudpar to determine work programs such as mentoring programs, counseling, training for rural tourism in the category or the developing embryo. One standardized assessment instrument is the assessment of performance against a tourist village. Therefore, in this study, researchers are trying to design a system of standardization of the tourist village of Bantul model performance measurement system balanced scorecard that includes the identification of performance criteria, strategic objectives, determining indicators of performance, the determination method / means of performance measurement precise, systematic and easy to use, as well as the design of performance reporting. The design activity in this study is divided into four phases, namely: the initial phase of the study and formulation of the problem, the design phase, the phase of analysis and conclusion phase. Early research phase and the formulation of the problem include the formulation of the problem and determine the research objectives. Design phase includes the design process performance measurement system with Balanced Scorecard method which includes the establishment of strategic objectives, the establishment of performance indicators (key performance indicators / KPIs), target setting and action plans, draft worksheet performance measurement methods Omax and draft reporting of performance-based website. Phase analysis includes analysis of balanced scorecard performance measurement system that includes analysis perspective, the analysis of strategic objectives, KPI analysis and analysis of the strategy map. Phase conclusions include conclusions from the findings and suggestions. From the research performance based on four perspectives of the balanced scorecard, namely financial, customer, internal business processes, learning and growth. Strategic objectives that form there are 10 and there are 24 KPI KPI formed. Besides of this study the formation worksheet Omax performance measurement method, so that can know the value of each performance indicator of performance and total performance in a particular period.
PENINGKATAN PERFORMA HASIL PEMBAKARAN MENGGUNAKAN MIXING COMBUSTION CHAMBER PADA KOMPOR BERBAHAN BAKAR BIOGAS MENUJU DESA MANDIRI ENERGI DI YOGYAKARTA Hariyanto, Kris; Mardwianta, Benedictus
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 1 (2016): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Biogas is an alternative energy sources as a substitute for fossil fuels in household activities daily, but there are obstacles in the use of biogas, namely the difficulty of arranging a flame that is stable and fuel consumption relatively less efficient biogas. So it takes a design development system that will produce a burning stove produces biogas-fueled stove fits the purpose of research, on the other hand biogas stove should be simple, cheap production price, maximum efficiency and safe to use. Stages in the study include: desk assessment, creation of objective requirements desing, manufacture conceptual and basic design, manufacture real stove. As for knowing the performance of the stove carried ujji stove performance are: test flame stability and efficiency. The results showed that the efficiency of the biogas stove design results in only 31 percent higher than the efficiency of biogas stoves old design, while the fuel consumption of biogas stoves new design is 16 percent lower when compared with fuel consumption of biogas stoves old design. In terms of manufacture and ease of repair and maintenance of gas cookers new design is more easily repaired and easy to make and simple in form compared with the old design biogas stoves.
DESKRIPSI PENILAIAN MASYARAKAT TENTANG DAMPAK PERKEMBANGAN KAWASAN TERBANGUN BERDASARKAN PERTIMBANGAN MULTI ASPEK DI KOTA YOGYAKARTA apriani, ani
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 1 (2018): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

The increasing of development in Yogyakarta City gives rise to controversy. Physical development-oriented activities tend to pursue economic benefits with less regard for social and environmental impacts. The purpose of this paper will describe the communitys assessment of the impact of regional development on environmental, socio-cultural and economic aspects. This research uses quantitative descriptive approach as the method. The perception of negative impact from built-up area development to the environmental aspect was represented by 128 people (32,0%) while no negative impact perception was represented by 272 people (68%). The perception of negative impact from built-up area development to the socio-cultural aspect was stated by the 83 respondents (20.8%) and 317 respondents (79.2%) presented no negative impact. Meanwhile, in the economic aspect, the perception of negative impact from built-up area developmment was expressed by 147 respondents (36.8%) and 253 respondents (63.2%) presented no negative impact. Keyword: Impact, City, Development, Community, Perseption.
METODE MARKOV CHAINS UNTUK ANALISA PERULANGAN FASIES DI SUB BASIN KILIRAN JAO SUMATRA BARAT Apriani, Ani
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 1 (2016): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Salah satu ironi dalam aplikasi geologi yaitu kita berhadapan dengan data fasies sebagai fungsi waktu, tetapi jarang dilakukan analisa statistiknya. Metoda Rantai Markov (Markov Chains) adalah salah satu cara untuk melakukan analisis perulangan fasies atau jenis batuan yang nantinya akan membantu dalam memprediksi dinamika sedimentasi. Tujuan dari penelitian ini yaitu melakukan analisa perulangan fasies dengan menggunakan metode markov chains. Metode statistik yang digunakan adalah deskriptif evaluatif dan diolah menggunakan Statistik Inferensial yaitu markov chains untuk mengetahui analisa perulangan fasies atau jenis batuan. Berdasarkan hasil analisis diketahui bahwa hadirnya suatu fasies dalam arti luas,tergantung pada fasies sebelumnya. Hal ini ditunjukkan dengan uji chi square dengan nilai x^hitung (10456) > x^tabel(51). Metode markov chains dapat melakukan analisa perulangan fasies yaitu dengan melihat matriks probabilitas transisi yang dapat memprediksi kehadiran fasies yang akan muncul selanjutnya sesuai dengan data yang ingin diketahui yang diprediksi dengan hadirnya fasies sebelumnya.
PENGEMBANGAN SISTEM PENYEMPROTAN PADA PLATFORM PESAWAT TANPA AWAK BERBASIS QUADCOPTER UNTUK MEMBANTU PETANI MENGURANGI BIAYA PERTANIAN DALAM MENDORONG KONSEP PERTANIAN PINTAR (SMART FARMING) Santoso, Djarot Wahju; Haryanto, Kris
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 9, No 2 (2017): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

This study aims to develop the technology of unmanned aircraft for agricultural purposes in realizing the food security of Indonesia. One of the main problems of agriculture in Indonesia is the high cost of agriculture especially the use of chemicals, fertilizer to labor. During this time farmers spend resources such as fertilizer to all plants without the required portion. So it should be attempted an engineering that can reduce the cost of agriculture in terms of labor usage for fertilizing activities and spraying of pests are relatively expensive. The method that will be used for the problem is to make a prototype of pest spraying system by using liquid media on platform unmanned Aerial Vehicle (UAV) with quadcopter base. Stages in this research include: desk assessment, making of design requirement objective, conceptual making and basic design and making real prototype UAV. The performance of the spraying results is done flight stability test and pest spraying performance. The test results show that the prototype UAV platform using 0.5 litres liquid media, capable of spraying an area of 2 m2 with a flying time of 10 minutes with a height of 70 cm from the ground. The results of this test will be developed further to be made a larger platform dimensions and capability of transport.
PERKIRAAN KONSUMSI ENERGI LISTRIK 2013 HINGGA 2030 ACEH TAMIANG Purnama, Rahmad; Setiawan, Ahmad Agus; Suhanan, Suhanan
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Aceh Tamiang is the province o f Aceh. The use of electrical energy is still not resolved in this case because of the lack of appropriate policies that can be taken because there is still no research how the amount of electrical energy consumption in Aceh Tamiang. the research method used is a model based approach to End Use of data population and households, the data GDP at constant prices, and consumption of electrical energy. All data is sourced from related agencies such as Bappeda Aceh Tamiang Data PLN Kuala Simpang branch. Forecasting electric energy consumption in Aceh on five sectors is the year 2013 was 48.8 GWh, while, in 2030 total energy consumption reached 76.5 GWh, this is an increase of 63.7 percent. The household sector accounted for the largest increase in consumption compared with other sectors for each year.
MEMBANDINGKAN KINERJA MESIN BENSIN DUA LANGKAH SATU SILINDER PADA SEPEDA MOTOR MENGGUNAKAN VARIASI CAMPURAN BAHAN BAKAR MINYAK HASIL PROSES PIROLISIS SAMPAH PLASTIK DAN PREMIUM DENGAN PREMIUM MURNI Wardoyo, Wardoyo
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 8, No 2 (2016): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

This research was aimed to know the performance of engine using variation of plastic waste pyrolysis and premium process result-gasoline fuel mix and pure premium and comparing with pure premium. The fuel mix variation used consisted of 20% plastic waste pyrolysis process result oil, 80% premium and 49%plastic waste pyrolysis process result oil, 60%premium. The research procedures included firstly the tested engine given pure premium fuel and the engine was run for 2-3 minutes by installing a transmission gear in 4th position, then rotation, torsion, power and specific fuel consumption was measured. Furthermore, the engine was stopped and the fuel was substituted with varied plastic waste pyrolysis process result oil mix, the engine was re-run. The measurement rotations, torsion, power and specific fuel construction was conducted by the same way with pure premium fuel testing. Out of test results for the same rotation of 5000-8000 engine RPM using fuel mix of 20% plastic waste pyrolysis process result oil the average power was 10.04 HP, average torsion of 11.10 Nm, specific fuel consumption of 0.100 kg/hour HP and engine using fuel mix of 40% plastic waste pyrolysis process result oil the average power was 9.7 HP, average torsion of 10.82 NM, specific fuel consumption o f 0.068 kg/hour HP. While using pure premium the average power was 9.8 HP, average torsion of 10.94 Nm, specific fuel consumption was 0.103 kg/hour HP. If compared, so that engine performance using fuel mix of 40% plastic waste pyrolysis process result oil and 60% premium almost approached engine performance using pure premium fuel and actually 20% fuel mix of plastic waste pyrolysis process result oil and 80% premium was better.
PEMANFAATAN IMAGE TO SPEECH BERBASIS ANDROID UNTUK PENGENALAN WARNA BAGI ANAK BAWAH TIGA TAHUN (BATITA) Wintolo, Hero; Widiastuti, Anggit Tri
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 7, No 2 (2015): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

The introduction of color to children under three years of age is done by providing and explaining objects favored by children, such as toys and food, which have certain colors so that children recognize colors at that age. Unlike adults, how to introduce color in children does require a different way, in addition to the objects and food, in this study the introduction of color in children is done by using the software that is installed on the smartphone using the image to speech. This method is expected to be more easily carried out and the results are expected to be maximum because of equipment smartphones today the price is very affordable and are often used by children ages two until three years old to play games.
APLIKASI METODE INTERPOLASI INVERSE DISTANCE WEIGHTING DALAM PENAKSIRAN SUMBERDAYA LATERIT NIKEL (Studi kasus di Blok R, Kabupaten Konawe-Sulawesi Tenggara) Purnomo, Hendro
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 1 (2018): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Abstrak. Inverse Distance Weighting (IDW) adalah salah satu metode interpolasi untuk menaksir suatu nilai pada lokasi yang tidak tersampel berdasarkan data disekitarnya. Metode ini sering digunakan dalam kegiatan eksplorasi karena dalam proses perhitungannya lebih sederhana dan mudah difahami. Penelitian ini bertujuan untuk memetakan sebaran bijih limonit secara lateral dan potensi sumberdaya nikel, dengan menggunakan metode IDW untuk menaksir kadar Ni dan ketebalan zona mineralisasi. Penelitian ini dilakukan berdasarkan data hasil pengebeboran prospeksi sebanyak 60 titik bor. Parameter power yang digunakan dalam proses interpolasi adalah 1, 2, 3, 4 dan 5. Untuk memilih nilai power yang terbaik digunakan parameter Root Mean Square Error (RMSE) yang diperoleh dari prosedur cross validation. Berdasarkan nilai RMSE terkecil diperoleh bahwa metode IDW dengan power 1 adalah yang terbaik. Dengan asumsi nilai cut-off grade adalah 1,2% Ni dan densitas limonit 1,6 ton/m³, hasil estimasi sumberdaya pada zona limonit adalah 151,7 juta ton bijih dengan kadar rata-rata 1,45% Ni atau setara dengan ± 2,2 juta ton logam nikel. Peta sebaran bijih menunjukkan bahwa potensi tambahan sumberdaya masih terbuka kearah selatan dan barat laut dari daerah penelitian.

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