1,720,956 research outputs found
Desain Penguat Lock-In Digital Untuk Deteksi Gas Berkonsentrasi Rendah
Get PDFPenelitian ini merancang dan membuat penguat lock-in digital (DLIA) yang diperuntukkan untuk sensor gas berkonsentrasi rendah. DLIA adalah penguat yang mampu untuk memulihkan sinyal yang terbenam di dalam derau. Tujuan dari penelitian ini untuk meningkatkan signal-to-noise ratio (SNR) dari sinyal kecil yang berasal dari sensor gas. Digital Signal Processing (DSP) diimplementasikan pada mikroprosesor ARM STM32F4. Sistem ini mempuyai penguatan variabel DC yang berkisar antara 20 sampai 100 dB. Kinerja DLIA ditunjukkan dengan mengukur sinyal kecil 100 mV pada 1 Hz dengan frekuensi cut-off (fc) 5 Hz. Hasil percobaan menunjukkan bahwa nilai SNR untuk sinyal asli dan output DLIA dengan penguatan satu kali, masing-masing adalah -4.73 dan 4.08 dB. Pada penelitian ini juga dilakukan pengukuran gas karbon monoksida (CO) berkonsentrasi 30 ppm menggunakan sensor gas semikonduktor MQ7 sebagai input dari sistem DLIA. Hasil pengujian menunjukkan bahwa nilai SNR untuk sinyal asli dan output DLIA dengan penguatan satu kali, masing-masing adalah 3.9 dan 7.8 dB. Untuk DLIA dengan penguatan empat kali dapat menghasilkan SNR sebesar 15.6 dB.
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This study has designed and constructed a digital lock-in amplifier (DLIA) for low-concentration gas sensors. DLIA is an amplifier which capable of recovering signals buried in the noise. The purpose of this research is to improve signal-to-noise ratio (SNR) of small signal coming from a gas sensor. Digital Signal Processing (DSP) is implemented on ARM STM32F4 microprocessor. The system has the DC gain ranging from 20 to 100 dB. DLIA performance is indicated by measuring small signal 100 mV at 1 Hz with cut-off frequency (fc) of 5 Hz. The experimental results show that the SNR values for the original signal and the DLIA output with a unity gain are -4.73 and 4.08 dB, respectively. In this study, carbon monoxide (CO) gas with the concentration of 30 ppm was measured using MQ7 semiconductor gas sensor as input for DLIA system. The experimental results show that the SNR values for the original signal and DLIA output with a unity gain are 3.9 and 7.8 dB, respectively. For DLIA with the gain of four can produce SNR of 15.6 dB
Pengembangan Strategi Blended Learning Sebagai Pendukung Perkuliahan Mahasiswa Milenial
No full textAt present, the development of learning patterns for students needs to be considered. The rapid advancement of technology requires educators, especially lecturers to provide new strategies to be able to help increase students\u27 interest in learning, especially millennial students who are starting to decreased. Millennial students more interested to want a learning model that is practical and not boring. This is what drives the writer to conduct research that focuses on learning models that are not only face-to-face in the classroom but can be done anywhere and anytime. The author choose blended learning as an applied learning model because this model is a combination of face-to-face learning and computer-based learning. The development of this model utilizes based on social media edmodo for education. The object of the study was conducted on two classes of word processing courses on office automation students ini AKSI Gresik. The object of research was 39 millenial students. The results obtained from the pretest and posttest there are significant differences in the average range of values obtained. Where at the time of the pretest the value entered in the interval 69 ≤ value ≤ 84 with good criteria. while at posttest the value entered in the interval of 85 ≤ value ≤ 100 with very good criteria. Keywords : Blended Learning, Learning Interest, Millenial Student Saat ini perkembangan pola pembelajaran terhadap anak didik perlu di perhatikan. Semakin pesatnya kemajuan teknologi, menuntut para pendidik khususnya dosen untuk memberikan strategi baru untuk dapat membantu meningkatkan minat belajar anak didik khususnya mahasiswa milenial yang mulai menurun. Mahasiswa milenial cenderung menginginkan model pembelajaran yang praktis dan tidak membosankan. Hal ini yang mendorong penulis melakukan penelitian yang berfokus pada model pembelajaran yang tidak hanya face-to-face di kelas namun dapat di lakukan kapanpun dan dimana saja.. Penulis memilih blended learning sebagai model pembelajaran yang terapkan, karena model ini merupakan kombinasi pembelajaran face-to-face dan pembelajaran berbasis komputer. Pengembangan model ini memanfaatkan media sosial edmodo berbasis pendidikan sebagai sarananya. Objek penelitian dilakukan terhadap 39 mahasiswa milenial. Hasil yang didapat dari pretest dan posttest terdapat perbedaan yang signifikan pada range rata-rata nilai yang didapat. Dimana pada saat pretest nilai masuk dalam interval 69 ≤ nilai ≤ 84 dengan kriteria baik. sedangkan saat posttest nilai masuk dalam interval 85 ≤ nilai ≤ 100 dengan kriteria sangat baik. Kata kunci : Blended Learning, Minat belajar, Mahasiswa Milenia
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
ANALISA IMPLEMENTASI BLENDED LEARNING TERHADAP TINGKAT PEMAHAMAN MATERI PERKULIAHAN MAHASISWA VOKASI
No full textMahasiswa vokasi merupakan mahasiswa dengan kurikulum praktikum lebih besar daripada teori. Dengan pembelajaran praktikum 60% dan teori 40% menjadikan mahasiswa vokasi membutuhkan pendekatan model pembelajaran yang dapat mempermudah dosen dalam menyampaikan teori secara maksimal. Tingkat keberhasilan penyampaikan materi diukur berdasarkan nilai kuisioner yang diperoleh dari mahasiswa. Atas dasar tersebut, maka penulis mengimplementasikan model blended learning sebagai upaya utama meningkatkan kualitas belajar mahasiswa vokasi. Model blended learning merupakan kombinasi pembelajaran tatap muka dengan pembelajaran online. Analisa hasil penelitian dilakukan dari data kuisioner tentang pemahaman materi perkuliahan. Hasil penelitian menunjukkan rata-rata nilai hasil kuisioner sebesar 3,80 yang termasuk dalam kategori “Faham”. Hasil uji validitas isi kuisioner menunjukkan nilai sebesar 0,51 yang berarti bahwa validitas tinggi dengan nilai “baik”
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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