1,720,973 research outputs found
Rancang Bangun Alat Pengukur Suhu Tanah Secara Multi Lateral Berbasis Mikrokontroler Untuk Pertumbuhan Benih Tanaman
Full text linkSuhu merupakan sifat tanah yang amat penting. Kebutuhan suhu tanah bagi tanaman berbeda-beda bergantung kepada jenis tanaman dan juga tingkat pertumbuhannya. Oleh karena itu telah dikembangkan sebuh alat pengukur suhu yang dapat mengontrol suhu tanah secara update dan real time sebaran suhu bawah permukaan. Alat yang dibangun ini terdapat 20 sensor suhu yang menggunakan IC LM35 yang membentuk sebuah elettroda. Sensor suhu ini dihubungkan ke sistem pengkondisi sinyal. Sinyal ini kemudian proses ke sistem akusisi data dengan menggunakan mikrokontroler AVR ATmega8 yang berfungsi untuk akuisisi data. Sistem yang bangun terintegrasi dengan personal computer (PC), yang berfungsi kontrol dan data base. Alat ini telah aplikasikan pada lahan pertanian dan data yang telah diperoleh, digunakan sebagai parameter fisis dalam memantau suhu tanah baik sebelum penanaman bahkan sampai tanaman bertumbuh.Temperature is an important soil properties. Soil temperature requirements for plants varies depending on the type of plant and its growth rate also. Therefore has developed a temperature measuring device that can control the temperature of the soil in the update and real time distribution of subsurface temperature. This tool was built there were 20 temperature sensors that use the IC LM35 which form an electrode. This temperature sensor is connected to the signal conditioning. The signals are processed by the data acquisition system using microcontroller AVR ATmega8. The system was built with integrated personal computer (PC), which serves to control and data base. This tool has been applied on agricultural land and the data that has been obtained is used as a physical parameter in monitoring the temperature of the soil well before planting even until the plants grow
Kajian Eksperimen Pengaruh Lingkungan Panas Terhadap Suhu Kulit Manusia Menggunakan Fast Response Temperature Probe PS-2135 dan Temperature Array PS-2157
Full text linkFisika merupakan ilmu alam yang saling berkaitan dengan ilmu lainnya. Salah satu keterkaitannya mempelajari sistem adaptasi tubuh manusia terhadap perubahan suhu. Suhu kulit adalah faktor mendasar dalam pertukaran panas antara tubuh dan lingkungannya. Tingkat suhu kulit secara langsung mempengaruhi transfer energi oleh konveksi dan radiasi dan juga memengaruhi kehilangan panas dari penguapan keringat. Dalam studi eksperimental ini, nilai perubahan suhu kulit dikumpulkan menggunakan Fast Response Temperature Probe PS-2135 dan Temperature Array PS-2157. Tujuan dari studi ini adalah untuk menyelidiki efek dari lingkungan panas pada respon fisiologis suhu kulit tubuhPhysics is a natural science that is interrelated with other sciences. One connection is studying the human body's adaptation system to temperature changes. Skin temperature is a fundamental factor in heat exchanges between the body and its environment. The level of skin temperature directly affects the energy transfer by convection and radiation and also influences heat losses from sweat evaporation. In this experimental study, the skin temperature changes values are collected using Fast Response Temperature Probe PS-2135 and Temperature Array PS-2157. The purpose of this study was to investigate the effects of warm environmental on physiological responses of body skin temperaturePhysics is a natural science that is interrelated with other sciences. One connection is studying the human body's adaptation system to temperature changes. Skin temperature is a fundamental factor in heat exchanges between the body and its environment. The level of skin temperature directly affects the energy transfer by convection and radiation and also influences heat losses from sweat evaporation. In this experimental study, the skin temperature changes values are collected using Fast Response Temperature Probe PS-2135 and Temperature Array PS-2157. The purpose of this study was to investigate the effects of warm environmental on physiological responses of body skin temperatur
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Optimasi Kapasitas Pembangkit Listrik Tenaga Hybrid (PLTH) di Pulau Bunaken Menggunakan Software HOMER
Full text linkTelah dilakukan penelitian tentang sistem pembangkit listrik tenaga hybrid menggunakan Software  HOMER (Hybrid Optimization Model For Electric Renewables). Tujuan dari penelitian ini untuk optimasi pembangkit listrik tenaga hybriddi Pulau Bunaken yang efisien dengan metode simulasi menggunakan software HOMER. Hasil penelitian menghasilkan rancangan sistem PLTH yang optimal adalah skenario 2 dengan kontribusi Pembangkit Listrik Tenaga Surya (PLTS) sebesar 1.374.514 kWh pertahun (61%),Pembangkit Listrik Tenaga Diesel (PLTD) sebesar 879.024 kWh pertahun (39%) dan kelebihan energi listrik pada skenario2 sebesar 1.018.247 kWh pertahun (45,2 %). Nilai Net Present Cost (NPC) terendah sebesar US/kWh. Sistem ini dapat mengurangi emisi gas buang sebesar 805.750 kg/tahun jika dibayarkan untuk penalti emisi gas buang sebesar US 3.981.811. The lowest COE value is 0,334 178.965 per yearÂ
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
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