1,720,959 research outputs found
RANCANG BANGUN INSTRUMENTASI LOAD CELL STRAIN GAUGE HALF BRIDGE PADA DYNAMOMETER PRONY BRAKE DENGAN SISTEM MONITORING LCD 16X4 DISPLAY BERBASIS MIKROKONTROLER ARDUINO
Full text linkProny Brake is one of the absorption type dynamometers because its work depends on adjusting the pulling torque, converting mechanical energy into heat. This tool will convert the output power of the motor into heat energy due to friction between the rotor shaft and the clamps. This prony brake system has vertical and horizontal load torque settings to achieve the desired loading conditions. This research focuses on the use of the Load Cell sensor as a receiver for the Prony Brake braking power load. So the purpose of this research is to see the performance of the instrumentation on the circuit and sensor readings. In this study, we obtained a Prony Brake dynamometer using a Load Cell Strain Gauge based on the mass or load caused by braking power by displaying the value on the Arduino nano-based 16x4 LCD that the researchers designed was less than optimal in carrying out its function. And the results on the performance of the Load Cell Strain instrument The gauge is still not optimal, it is obtained that the error limit (Error) in the braking power of the tool against the target has an average of 2.76% according to the provisions of the error with an average of 2kg not more than 2%
"Perancangan dan pembuatan alat penghancur sampah buah untuk perlakuan awal dalam sistem bio-digesting
No full textRANCANG BANGUN INSTRUMENTASI INFRARED OBSTACLE AVOIDANCE SENSOR PADA DYNAMOMETER PRONY BRAKE DENGAN SISTEM MONITORING BERBASIS IOT (INTERNET OF THINGS)
Full text linkDynamometer is a test tool used to measure the torque of the motor. There are several types of dynamometers currently available, including Prony Brake dynamometers, Water Brake dynamometers, Rope Brake dynamometers, Eddy Current dynamometers, and Motor Generator dynamometers. In this thesis the researcher uses the Prony Brake Dynamometer system. The working principle of Prony Brake is to use the braking principle. Braking is done by adjusting the gas handle which presses the disc brake dynamometer which rubs against the motorbike's disc brake. The purpose of this research is to design and realize a Prony Brake type motor torque meter equipped with a sensor as a reading of the engine rotational speed value. As for what is produced in this study is the design of electrical Infrared sensors can work in accordance with the objectives in the formulation of this thesis problem. It is proven that the infrared sensor can read the rotary speed value of the prony break dynamometer engine and can send the results of that value to the Thinger.io web
RANCANG BANGUN INSTRUMENTASI HALL EFFECT SENSOR MAGNETIC PADA DYNAMOMETER PRONY BREAKE DENGAN SISTEM MONITORING LCD 16X4 DISPLAYBERBASIS MIKROKONTROLER ARDUINO
Full text linkA dynamometer is a machine used to measure the torque (torque) and rotational speed (rpm) of the power produced by an engine, motor or other rotating drive. Dynamometers can also be used to determine the power and torque required to operate a machine. So the research aims to be able to design a prony brake dynamometer using a Hall Effect Magnetic Sensor. And can find out the performance of the Hall Effect Sensor and engine performance on the results of the value of Torque and Horse Power. As for the results of this study, it was found that the prony brake dynamometer using the hall effect sensor can work according to its function. And using the hall effect sensor in this system, the average reading result has an error of 1.42%, meaning that the sensor is suitable for use on a prony brake dynamometer machine because the error threshold is 2%
PERANCANGAN DAN PEMBUATAN REAKTOR FIXED BED GASIFIER UNTUK PRODUKSI SYNGAS DARI BIOMASSA SEBAGAI ALTERNATIF BAHAN BAKAR GENERATOR DIESEL
Full text linkPemanfaatan beberapa biomassa yang berpotensi menjadi sumber energi terbarukan. Penelitian ini bertujuan untuk mengetahui proses perancangan dan pembuatan reaktor fixed bed gasifier dan menganalisis hasil proses gasifikasi menggunakan 4 jenis biomassa yang berbeda melalui beberapa tahapan untuk produksi gas mampu bakar atau syngas. Pengujian reaktor menggunakan 4 jenis biomassa yang berbeda dengan jumlah 3 kg untuk setiap biomassa serta laju aliran udara 1,2 m/s kemudian diproses reaktor fixed bed gasifier melalui proses gasifikasi. Hasil penelitian dan pengujian menunjukkan proses gasifikasi dapat menghasilkan syngas (CO, CH4, H2). Metode Penelitian menggunakan metode experiment dengan proses pengujian menggunaka biomassa tempurung kelapa yang dapat menghasilkan syngas lebih effisien dibanding biomassa lain. Hal ini desebabkan karena biomassa tempurung kelapa memiliki nilai kalor yang tinggi, laju aliran gas stabil, efisiensi gasifikasi, laju aliran udara terbatas, efisiensi waktu, dan hasil nyala api stabil secara visual berwarna merah pekat. Hasil pengujian berupa gas akan didistibusikan untuk bahan bakar generator / genset sebagai pengganti bahan bakar minyak
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
RANCANG BANGUN FILTER WET SCRUBBER UNTUK PENURUNAN TEMPERATUR DAN PENGURANGAN KANDUNGAN TAR TERHADAP HASIL SYNGAS PROSES GASIFIKASI
Full text linkBiomassa merupakan salah satu sumber alam yang dapat dimanfaatkan sebagai sumber energi terbarukan, pemanfaatan biomassa sebagai sumber energi dapat dilakukan dengan teknologi gasifikasi. Teknologi gsifikasi merupakan proses pengkonversian bahan bakar padat menjadi gas mampu bakar (CO, CH4, H2) melalui pross pembakaran. Produk gas hasil gasifikasi tersebut berupa gas mampu bakar seperti karbon monoksida (CO), Hidrogen (H2), gas metan, pengotor anorganic seperti NH3 dan HCN, Kandungan H2S, debu halus dan pengotor organik seperti tar. Untuk pengrangan kandungan tar maka perlu adanya proses penyaringan, dalam penelitin ini menggunakan filter wet scrubber dengan tujuan penurunan temperature dan penyaringan kandungan tar, debu serta mendapatkan visualisasi nyala api terbaik dari 4 jenis biomssa dengan pengaturan tekanan air pada sprayer. Disisi lain pengurangan kandungan tar berpegaruh terhadap hasil syngas yang nantinya hasil syngas diteruskan ke mesin diesel sebagai penganti bahan bakar minyak, jika syngas masih mengandung tar, dapat menghambat bahkan merusak dari mesin diesel tersebut. Peneliti menggunakan 4 jenis biomassa yaitu: serbuk kayu jati, kayu sengon, sekam padi dan tempurung kelapa dengan tekanan sprayer 2,3,4 kg/cm2. Dari 4 jenis biomassa didapat nyala api terbaik yaitu tempurung kelapa dengan tekanan sprayer 4 kg/cm2, temperature 193 oC dan nyala api tanpa mengandung asap serta hasil syngas sedikit mengandung kandungan tar
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
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