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All Journal JURNAL SISTEM INFORMASI BISNIS Jurnal Mahasiswa Teknik Sipil Universitas Tanjungpura Pendidikan Dan Kepelatihan Olahraga Ethos Alchemy Jurnal Penelitian Kimia EKOMBIS REVIEW: Jurnal Ilmiah Ekonomi dan Bisnis Prosiding Forum Studi Transportasi Antar Perguruan Tinggi Jurnal Pendidikan Ilmu Sosial Sinkron : Jurnal dan Penelitian Teknik Informatika Jurnal Riset Manajemen dan Bisnis (JRMB) Fakultas Ekonomi UNIAT EDUHUMANIORA: Jurnal Pendidikan Dasar JURNAL MEDIA INFORMATIKA BUDIDARMA Rancang Bangun Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Elektronika dan Telekomunikasi JURNAL EKONOMI PENDIDIKAN DAN KEWIRAUSAHAAN Jurnal Ilmiah Ecosystem Jurnal Pena Karakter (Jurnal Pendidikan Anak dan Karakter) Open Access Indonesia Journal of Social Sciences Open Access Indonesia Journal of Social Sciences
Slamet Widodo
Politeknik Negeri Semarang
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences Transportation Other

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PROCESS TECHNOLOGY OF FABRICATION NO2 GAS SENSOR DEVICES WITH ACTIVE LAYER In2O3 Widodo, Slamet
Alchemy Jurnal Penelitian Kimia Vol 10, No 1 (2014)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

This paper discuss the design and fabrication of NO2 gas sensor based on metal oxide using thick film technology was described. The design of gas sensor is consisted of components, i.e. heater, electrode (interdigital fingers) and sensitive layer from In2O3 material. This sensor has been designed as multilayers with heater and both electrodes in one surface , in accordance with miniaturisation aspect, heat distribution and less consumption of energy from the sensor device. The heater and electrode were fabricated on alumina substrate (aluminum oxide/Al2O3) with silver paste. The In2O3layer provides resistance change when it is exposed by NO2 gas. It indicates that this sensor device has a potency to be used as NO2 detector.
LIFT OFF PROCESS ON FABRICATION OF CARBON MONOXIDE (CO) GAS SENSOR DEVICES Widodo, Slamet; Wiranto, Goib
Alchemy Jurnal Penelitian Kimia Vol 10, No 2 (2014)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

This paper discuss the design and fabrication of microdevice to be used as platform for CO (Carbon monoxide) gas sensor based on tin dioxide (SnO2). The device has been designed on silicon substrate with an active area of 3x3 mm2, and it is consist of bonding pad, heater, electrode, and temperature sensor components. The minimum feature size used is 50 microns, as allowed by the capability of photolithographic process. The formation of microdevice structure was carried out by lift-off technique on platinum (Pt) layer, which was deposited by DC sputtering with aluminum (Al) as sacrificial layer. The overall chip dimension is 5x5 mm2.  The measurement that was conducted to study the characteristic of resistance as function of temperature has shown  that the heater and temperature sensor elements could work as expected, in which their resistances change linearly as the temperature of the substrate increase by 20 – 200 °C. The resistance values of the heater increase 500 – 1000 ohm. Meanwhile, the resistance increasing for temperatur sensor is between  100 – 300 ohm.
ALAT PENDETEKSI KEBOCORAN GAS BERACUN CO PADA MOBIL DENGAN ARRAY SENSOR MENGGUNAKAN FUZZY CONTROLLER Widodo, Slamet; Sari, Eka Rahma
ETHOS (Jurnal Penelitian dan Pengabdian) Vol 4 No.1 (Januari 2016) Ethos: Jurnal Penelitian dan Pengabdian (Sains & Teknologi)
Publisher : Universitas Islam Bandung

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Abstract

Perkembangan teknologi otomotif sekarang ini semakin pesat yaitu dengan fasilitas accessories mobil yang semakin lengkap. Namun berbagai fasilitas yang terdapat dalam mobil tanpa disadari menyimpan ancaman bahaya bagi pengguna mobil salah satunya ketika system pada AC (Air Conditioner) terjadi kebocoran maka gas CO (karbon monoksida) akan memenuhi ruang mobil yang tertutup. Gas CO ini sangat berbahaya karena gas ini tidak berwarna, tidak berbau, dan tidak berasa sehingga sulit untuk dideteksi yang dapat menyebabkan orang yang ada didalam mobil menjadi mati lemas tanpa disadari karena menghirup gas CO yang bocor. Dengan fenomena tersebut dibutuhkan sebuah alat yang dapat mendeteksi dan mengontrol kebocoran gas CO untuk memberikan rasa aman kepada pengguna mobil. Alat ini menggunakan kendali logika fuzzy sebagai proses pengambilan keputusan sebagai hasil nilai dari inferensi kerja array sensor. Pengendali utama pada sistem menggunakan mikrokontroller ATmega32. Ketika array sensor yaitu TGS2442 dan TGS2600 mendeteksi kadar gas CO >29,0 ppm berarti dalam status bahaya sehingga buzzer akan aktif diikuti motor DC yang menggerakkan kaca mobil agar terbuka. Berdasarkan lima kali pengujian yang dilakukan didapatkanlah rata-rata selisih error output gas sebesar 0.29 ppm disaat kondisi aman dan 3.87 ppm disaat kondisi bahaya.
INOVASI TEKNOLOGI TEPAT GUNA UNTUK MENINGKATKAN PRODUKTIVITAS, NILAI TAMBAH DAN AKSES PASAR USAHA MIKRO DI UNIT PERMUKIMAN TRANSMIGRASI “KARANG CAHYO” KABUPATEN BENGKULU SELATAN Slamet Widodo, Soengkono; S. Hindarto, Kanang; Widodo, Slamet; Mujiharjo, Sigit
Ekombis Review Vol 3, No 2 (2015)
Publisher : Universitas Dehasen Bengkulu

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Abstract

Soengkono, Kanang S. Hindarto, Slamet Widodo, Sigit Mujiharjo; The objective of the first research is to know: (1) the background of economic factors of transmigrant, (2) the natural resources potency, (3) the human resources of transmigrant potency, (4) the analysis of business environment, (5) the model micro business development, (6) the build of micro business group, (7) the formulation model based on human and natural resource potency with simple and accepted technology, (8) the practice of simple and accepted technology, (9) the practice of marketing, and (10) the training of small/micro business management. The result of the research is identified that: (1) the transmigrant society have a high motivation to stay at location study, (2) the transmigrant society wish to facilitation in economic development to income generating, (3) the transmigrant society zeal for to follow research program conducted by researcher, (4) have been build of small business group, (5) have executed of simple and accepted technology test-drive, (6) have executed of training of small business management, (7) marketing management. In general the model based on human and natural resource potency with simple and accepted technology have been increase of income generating of transmigrant.Key Word: Transmigrant, Micro Business Development, Simple and Accepted Techology, Productivity, Value Added, Market Access, and Incoming Generating
PENGGUNAAN HAMMER TEST DAN UJI CBRLAPANGAN UNTUK MENGEVALUASI DAYA DUKUNG PONDASI CEMENT TREATED BASE (CTB) Widodo, Slamet
Prosiding Forum Studi Transportasi Antar Perguruan Tinggi Vol 3 No 1 (2015): The 17th FSTPT of International Symposium
Publisher : FSTPT Indonesia

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Abstract

High intensity of rainfall in tropical region causes the subgrade often geting a deteoriation of soil support that influences the pavement performance on it. Therefore, in the Kalimantan West province the type of pavement, rigid pavement, was widely applied. In this paper a study regarding with a evaluation of pavement  using Cement Treated Base on link of Simpang-1 Belitang – Belitang in Sekadau regency with applying a Hammer test and CBR test on the field was already undertaken which the result as a second opinion of  academic contribution. The results suggest that the pavement is still a good performance to serve road traffic which compression strength was above 125 kg/cm2 and the CBR test was above 125%.
DEVELOPMENT OF STUDENT ACTIVITY SHEET BASED ON SCIENTIFIC APPROACH TO IMPROVE PROBLEM SOLVING SKILL OF SURROUNDING ENVIRONMENT IN ELEMENTARY SCHOOL STUDENTS Widodo, Slamet
JURNAL PENDIDIKAN ILMU SOSIAL Vol 26, No 2 (2017)
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jpis.v26i2.2270

Abstract

This study aims to design and develop the feasibility of scientific approach-based students’ worksheet to improve four graders’ problem-solving skills on surrounding environment issues. This study was conducted using Research and Development (RD) method which produces scientific approach-based students’ worksheet. Practicality of this students’ worksheet based on learning practice showed excellent result. This scientific approach-based students’ worksheet can be used to teach and improve students’ problem-solving skills on surrounding environment in the fourth grade of Elementary School. This case is proved by good performance of students in solving problems related to their surrounding environment with a percentage of 81% which shows very high category.
PENINGKATAN KETERAMPILAN PARTISIPASI SOSIAL MELALUI PENDEKATAN PEMBELAJARAN KONTEKSTUAL DI SEKOLAH DASAR Widodo, Slamet
EduHumaniora | Jurnal Pendidikan Dasar Kampus Cibiru Vol 10, No 1: Januari 2018
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/eh.v10i1.8403

Abstract

 Abstract:. The research was conducted on the basis of students' lack of social participation  in the community. The cause of this situation is the lack of understanding of the students related to the importance of social participation skills. The purpose of this study was to describe the increase in the participation of students' social skills. The research design used classroom action research with data collection instruments, namely observation sheets, test sheets and questionnaire sheets. Data analysis technique used quantitative and qualitative. The research results showed that the participation of students' social skills improved through contextual learning approach.Keyword: social studies, Learning Approach Contextual, Social Participation Skills. Abstrak: Penelitian ini dilaksanakan atas dasar partisipasi sosial siswa yang masih kurang di masyarakat. Penyebabnya adalah kurangnya pemahaman siswa terkait pentingnya keterampilan partisipasi sosial. Tujuan penelitian ini adalah untuk mendeskripsikan peningkatan keterampilan partisipasi sosial siswa. Desain penelitian menggunakan penelitian tindakan kelas dengan instrument pengumpulan datanya yaitu lembar observasi, lembar tes dan lembar angket. Teknik analisis data yang digunakan adalah kuantitatif dan kualitatif. Penelitian ini menunjukkan hasil bahwa keterampilan partisipasi sosial siswa meningkat melalui pendekatan pembelajaran kontekstual.Kata Kunci: Pendidikan IPS, Pendekatan Pembelajaran Kontekstual, Keterampilan Partisipasi Sosial.
PENGARUH KEMANDIRIAN BELAJAR DAN SARANA PERPUSTAKAAN SEKOLAH TERHADAP HASIL BELAJAR PRAKTEK PENGANTAR EKONOMI DAN BISNIS DI SMK NEGERI 10 SURABAYA Widodo, Slamet
JURNAL EKONOMI PENDIDIKAN DAN KEWIRAUSAHAAN Vol 4, No 2
Publisher : UNIVERSITAS NEGERI SURABAYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jepk.v4n2.p214-224

Abstract

This study aims to assess the effect of independent learning and school library facilities on learning outcomes practice on introductory economics and business subjects.This study uses a quantitative approach, with as many as 204 respondents were taken from the part of the population that has been determined, amounting to 418 students. Data were obtained through a questionnaire enclosed means party members who completed questionnaires answers through alternative answers that have been provided by the researcher.The data of this study focuses on a class XI student of Business and Management Expertise consisting of eleven classes that include skills programs Accounting, Office Administration, Banking and Retail Business Management which is exactly the lesson introductory class on economics and bisnsi given.Related to the objective (1), the results showed that there is influence of the independent learning Learning Outcomes Practice Introduction to Economics and Business Class XI at SMK Negeri 10 Surabaya. (2) the results showed that there is influence means the school library to learn the results of introductory economics and business practice in class XI in SMK Negeri 10 Surabaya. (3) The results showed that there is influence of independent learning and school library facilities simultaneously on learning outcomes of introductory economics and business practices
EVALUASI NON-DESTRUSTIF KANDUNGAN ASAM LEMAK BEBAS (ALB) TANDAN BUAH SEGAR (TBS) KELAPA SAWIT DENGAN METODE NIR SPEKTROSKOPI Iqbal, Zaqlul; Herodian, Sam; Widodo, Slamet
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 2 (2018): Agustus
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (945.243 KB) | DOI: 10.23960/jtep-l.v7i2.80-87

Abstract

Kadar Asam Lemak Bebas (ALB) yang rendah merupakan salah satu indikator kualitas Crude Palm Oil (CPO) yang baik. Apabila Tandan Buah Segar (TBS) kelapa sawit yang lewat matang ikut diolah menjadi CPO, maka kadar ALB selama produksi dapat meningkat. Proses pemanenan menjadi titik krusial yang sangat mempengaruhi tingkat kematangan buah. Selama ini penentuan kematangan TBS kelapa sawit masih dilakukan secara visual yang bergantung kepada kemampuan dan kondisi pemanen buah sawit. Oleh karena itu, perlu dikembangkan suatu metode secara kuantitatif yang dapat memprediksi kadar ALB secara objektif. Pada penelitian ini, akan dikembangankan metode non-destruktif berbasis NIR spectroscopy yang akan dikaji sebagai metode untuk menentukan tingkat kematangan TBS berdasarkan kandungan ALB. Penelitian ini dibagi menjadi tiga tahapan, yaitu akuisisi data reflektansi spektrum TBS dengan NIR Flex N-500, pengukuran kadar ALB, dan pembangunan model kalibrasi dengan menggunakan kemometrik. Dari hasil pengembangan model didapatkan nilai R2 tanpa preprocessing sebesar 0.236, RPD sebesar 1.27 dan PC sebesar 2. Proprocessing First Derivative Savitzky Golay (DG1) memberikan nilai koefisien determinasi tertinggi yaitu sebesar 0.243, dengan nilai RPD sebesar 1.17 dan PC sebesar 2. Akan tetapi kualitas model kalibrasi yang dibangun tetap belum mampu menunjukkan kehandalan dalam memprediksi kandungan ALB tandan buah segar kelapa sawit.
Analysis of Non Linear Frequency Modulation (NLFM) Waveforms for Pulse Compression Radar Widyantara, Muhamad Ridwan; -, Sugihartono; Suratman, Fiky Y.; Widodo, Slamet; Daud, Pamungkas
Jurnal Elektronika dan Telekomunikasi Vol 18, No 1 (2018)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v18.27-34

Abstract

Non Linear Frequency Modulation (NLFM) method can suppress the peak sidelobe level without additional windowing function. NLFM doesn’t require any weighting function because it has inbuilt one. NLFM has a variable frequency deviation function due to the relation between frequency and time of the signal which is not linear so that it is possible to suppress of peak sidelobe level. This paper studies the characteristic of various NLFM waveform, such as NLFM Tri Stage Piece Wise (TSPW), NLFM S, and NLFM Taylor. The study of Pulse Compression of NLFM waveform consists of three aspects. First, analysis of pulse compression performance. Second, analysis of background noise. Last, analysis of Doppler effects. The simulation is done using Matlab software. The lowest  value Peak Sidelobe Level (PSL)of NLFM TSPW is about -20 dB while NLFM S and NLFM Taylor are about -32 dB and -39 dB. Additive White Gaussian Noise (AWGN) and Doppler Effect influenced the value of PSL for each NLFM waveform. NLFM Taylor has the best NLFM waveform when the Doppler Effect and AWGN cause the value of PSL become high. Comparison between NLFM Taylor and Linear Frequency Modulation(LFM) is done in radar surveillance applications to analyze the detectability performance where the condition of Radar Cross Section (RCS) for each target has different significant value. The three targets are commercial airplanes, helicopter and fighter. For detectability performance, NLFM Taylor can detect more clearly than LFM conventional.
Co-Authors - Hermawan - Kamarullah - Ridwan -, Sugihartono ., Sawaluddin Achmad, Netto Adriansyah, . Agrista, Pregi Ahendra, - Akhmadali . Akhmadali, - Alfianda, - Alfina Maysyurah Andri, Oktavianus Andriani, Nety Andy Alfatih Aris Munandar Asnawi, Uray Farizi Bani, - Daryoto ., Daryoto Daud, Pamungkas Desembardi, Faried Desembarti, Faried Eka Rahma Sari, Eka Rahma Eko Sediyono Ermansyah, Derry Eti Sulandari Fadly, Galih Fiona, Febzi Fitriyanto, Azis Goib Wiranto, Goib Gumilar, Rian Doto Handayani, Raynanda Heri Azwansyah Heriyadi, - Herlambang Brawijaya, Herlambang Hidayati, Ridha Israk, Galamda Juliarsih, Santi Juniarti, Mahisza Kadarini, S. Nurlaily Kanang S. Hindarto, Kanang Katmoko, Desi Susilo Khafizan, - Komala Erwan Kurrahman, Taupik maranatha, Okta Minardi, - Murni Murni Murshal Manaf, Murshal Musa, Mochamad Iqbal Nasution Nasution Novianto, Hendrawan Novianto, Verry Nur’sila, Resti Pratama, Nugraha Yuda Pristianto, Hendrik Puji Sulistiyo Adi, Urip Purnomo, Aris Pusaka, Semerdanta Puspita, Anggri Rahayu, Usiyani Rajina, - Rumakefing, Sadli S, Pebriyetti S. Suyono, Rudi Sahari, Wira SAID . Saifuddin Sirajuddin Salam, Rahmi Ariani Sam Herodian Samudi Samudi Saputri, Nining Saputro, Eko Danan Sarnando, Nerilius Sigit Mujiharjo, Sigit Silaban, Adri Rizky Simamora, Herberto Yeremia Siti Mayuni Siti Nurlaily Kadarini, Siti Nurlaily Situmorang, Maruli Soengkono Slamet Widodo, Soengkono Sudiyono, Dian Sugasta, Hervian Handika Summiyattinah, - Supratman, Iknatius Eko Suratman, Fiky Y. Susetyo, Sugeng Susianto, - Sutrisno, Ady Suyono, Rudi S. Tamala, Evi Teddy Ariyadi Widyantara, Muhamad Ridwan Wiyono, Widyo Zainudin, - Zaqlul Iqbal