232 research outputs found
Integrated control mechanism of electrical discharge machining system for higher material removal rate
No full textA servo control system in Electrical Discharge Machining (EDM) system is a control system with an appropriate control algorithm to position electrode on a particular distance from workpiece during machining process. The gap between the electrode and the workpiece is in the range of 10 – 50 μm. This ideal gap is achieved by applying an appropriate control algorithm to the servo control system of the EDM, and maintaining this gap will improve the Material Removal Rate (MRR) during the machining process. A considerable number of unique methods were proposed in the control algorithm in order to bring the electrode to the optimum position. This research proposes a new method called Integrated Control Mechanism (ICM) to improve the MRR of the EDM system. A rotary encoder is used as an additional mechanical sensor for the feedback control system in order to limit the electrode movement. Modelling of EDM is further investigated to predict the MRR parameter and optimization of electrode control position. A Neural Network system is used to predict MRR where Particle Swarm Optimization (PSO) and Differential Evolution (DE) are studied and simulated to optimize the Proportional Integral Derivative (PID) control parameters for the EDM system. Research conducted shows that the proposed Feed Forward Artificial Neural Network improves the accuracy of prediction in determining MRR by 2.92% and PID parameter optimization is successfully applied either using PSO or DE. The ICM is successfully implemented and the result shows that MRR is higher when compared to the normal machining process
OTOMATISASI PEMBUATAN TIRAMISU BERBASIS MIKROKONTROLER AT89S52
No full textDunia otomatisasi yang terus
berkembang semakin berpengaruh terhadap
kehidupan kita sehari-hari. Tidak terkecuali
aplikasi dalam rumah tangga, semakin banyak
pula yang memanfaatkan otomatisasi seperti rice
cooker, microwave, dan lain-lain. Tiramisu
merupakan makanan khas Italia, pembuatannya
meliputi 3 tahap yaitu pencampuran pada suhu
400C, homogenisasi pada suhu 40C dan
pembekuan pada suhu -100C. Selama ini
pembuatannya masih manual yang memungkinkan
perpindahan mesin. Dalam tugas akhir ini
dirancang mesin otomatisasi untuk pembuatan
tiramisu.
Mesin otomatisasi yang berbentuk
kabinet refrigerator menggunakan sensor suhu
LM35CZ untuk mengetahui suhu dalam mesin,
keluaran sensor dikuatkan penguat selisih untuk
dapat menjadi masukan ADC (Analog to Digital
Converter) yang selanjutnya diolah
mikrokontroler untuk menggerakkan actuator
yang berupa pemanas dan kompresor sesuai
dengan suhu – suhu yang diperlukan dalam
proses.
Proses pembuatan tiramisu dengan
mesin otomatis ini lebih praktis dibandingkan
dengan cara biasa karena cukup menggunakan
satu alat kerja untuk pemanasan dan
pendinginan. Selain itu tidak perlu pengawasan
secara terus – menerus dari operator saat
peralihan proses pemanasan ke pendinginan.
Produk akhir yang dihasilkan lebih kental, tidak
terlalu keras dan tidak cair.
Kata kunci : otomatisasi, tiramisu,
mikrokontroler, refrigerato
Comparison of cost estimation methods in power wheeling for Java-Bali interconnection system
No full textComparative study of operating roominfrastructures and installations
No full textTreballs Finals de Grau d'Enginyeria Biomèdica. Facultat de Medicina i Ciències de la Salut. Universitat de Barcelona. Curs: 2022-2023. Tutor/Director: Trias Gumbau, GerardThis report presents a comprehensive comparative study on the Operating Rooms (OR) infrastructures and installations in various hospitals in Catalonia. By examining four prominent institutions, this study aims to unravel the diverse approaches and unique considerations involved in OR facilities design and construction.Through documentary review, site visits, and data collection, the author explores the similarities and differences among these hospitals, shedding light on the impact of factors such as hospital context, funding sources, and specialization on OR design. The findings highlight that while there are commonalities aligned with prevailing trends and standards, significant differences exist, primarily influenced by the hospital’s specific contexts. The conclusions drawn from the study, provide valuable insights for future OR design and construction projects, enabling hospitals tooptimize resources and enhance patient care within their distinctive environments
PEMAKSAAN KONSEP TRIAS POLITICA PADA KEDUDUKAN KOMISI PEMBERANTASAN KORUPSI DALAM SISTEM KETATANEGARAAN INDONESIA
No full textThis article analyzes the coercion of trias politica on the KPK\u27s position in the Indonesian constitutional system in Act Number 19-year 2019 concerning KPK, which the author limits to three issues: first, the background of KPK institution in Indonesia, secondly the position of KPK in Indonesia\u27s constitutional system after the revision of the KPK’s Act, and third analysis the KPK\u27s position. This research is normative legal research with statutory approach, conceptual approach, historical approach, and comparative approach. The results show that the background to the existence of the KPK in Indonesia is due to the inability of conventional institutions to resolve corruption, namely the Police and the Attorney General\u27s Office which incidentally are part of the executive. The position of KPK in the state administration system in Indonesia after the revision of the KPK’s Act has been transformed into part of the trias politica concept, namely the executive branch. And the transition of the KPK\u27s position in the state administration system in Indonesia to being part of the Executive clearly imposes the concept of trias politica which is outdated. KPK should remain an independent institution that can be aligned with the trias politica, as many other countries have done
Building proper invariants for subgrid-scale eddy-viscosity models
No full textSince direct simulations of the incompressible Navier-Stokes equations are limited to relatively low-Reynolds numbers, dynamically less complex mathematical formulations are necessary for coarse-grain simulations. Eddy-viscosity models for Large-Eddy Simulation is probably the most popular example thereof: they rely on differential operators that should be able to capture well different flow configurations (laminar and 2D flows, near-wall behavior, transitional regime...). Most of them are based on the combination of invariants of a symmetric second-order tensor that is derived from the gradient of the resolved velocity field. In the present work, they are presented in a framework where all the models are represented as a combination of elements of a 5D phase space of invariants. In this way, new models can be constructed by imposing appropriate restrictions in this space. The performance of the proposed models is successfully tested for a turbulent channel flow
INDEPENDENSI KEKUASAAN KEHAKIMAN DALAM SISTEM TRIAS POLITICA DI INDONESIA
No full textThis article is a conceptual study with a normative research model that uses the statute approach and conceptual approach. This means that this research is not empirical research or field research. The author conducted a study of several literature related to judicial independence in Indonesia with a trias political government system. What the author wants to explain is the existence of an independent judiciary with a government system divided between the judiciary, the executive branch and the executive branch. Of course, government with things like this cannot be separated from intervention between the government (executive) and the judiciary (judiciary). However, with the various legal umbrellas that exist in Indonesia, it turns out that the judiciary is far from government interests or government control. This is the concluding drawing of the data reduction and display that the writer carried out
O jovem doente, de Xavier Bonfill i Trias
No full textThis is a direct translation from Catalan to Brazilian Portuguese of a short story by Xavier Bonfill i Trias (1888-1939), a Spanish writer and journalist. The short story was taken from the book El Meu Poble, published in 1948 by the former Popular Library of Sant Boi de Llobregat, Spain, as a posthumous tribute to the author. Our goal with this translation is to present and promote the work of the Catalan writer in Brazil, as there are still few works translated directly from this minority language, which fights for recognition and constantly resists devaluation and the threat of extinction.Esta é uma tradução direta do catalão ao português brasileiro de um conto de Xavier Bonfill i Trias (1888-1939), escritor e jornalista espanhol. O conto foi extraído da coletânea El Meu Poble, publicada em 1948 pela antiga Biblioteca Popular de Sant Boi de Llobregat, Espanha, como uma homenagem póstuma ao autor. Nosso objetivo com esta tradução é apresentar e divulgar a obra do escritor catalão no Brasil, pois ainda hoje há poucas obras traduzidas diretamente a partir dessa língua minoritária, que luta por reconhecimento e resiste constantemente à desvalorização e às ameaças de extinção
Pengatur Kecepatan Prototipe Mesin Solenoid 4 Induktor Menggunakan Metode Kontrol Frekuensi
No full textThe development of electric vehicles is in rapid progress, especially in terms of the main engine drive. The use of solenoid can be applied as an alternative driving electric vehicles instead of a dc motor as the main driver. In this paper, the prototype solenoid machine is applied by using 4 inductors controlled by an Arduino microcontroller and the solenoid driver based on application of Mosfet L298N. The prototype runs successfully. Based on the experimental results, the greater the frequency value applies to the driver, the faster the solenoid moves. The acceleration occures due to the electromagnetic field which is getting stronger and the field is proportional to the frequency value, so the solenoid movement is faster
ANALISA DAN IMPLEMENTASI IPV 6 TUNNEL BROKER UNTUK INTERKONEKSI ANTARA IPV6 DAN IPV4
No full textSejak pelepasan IPv4 pada awal tahun 90-an, pengalamatan 32 bit IP lama kelamaan akan habis. Dalam
kurung waktu yang tidak lama untuk menambah pengalamatan IP telah datang yang disebut dengan IPv6 atau IP Next
Generation.
IPv6 sebagai standard baru harus mampu berinterkoneksi dengan IPv4 yang sudah umum digunakan. Karena
pada dasarnya IPv6 tidak kompatibel dengan IPv4 maka diperlukan suatu mekanisme tertentu agar IPv6 ini dapat
berinterkoneksi dengan IPv4. Mekanisme dasar dari IPv4 ke IPv6 diantaranya, Dual IP Stack, Tunneling, Translasi
protokol. Sistem tunneling adalah sistem yang menghubungkan antara jaringan IPv4 ke jaringan IPv6 dengan
menggunakan tunnel broker.
Pada tugas akhir ini akan dibuat IPv6 tunnel broker untuk interkoneksi antara IPv6 dan IPv4 yang meliputi
perancangan jaringan IPv4, IPv6 dan PC sebagai tunnel broker, tunnel server dan DNS server. Selanjutnya diuji dan
dianalisa sehingga diperoleh hasil suatu sistem yang dapat digunakan untuk komunikasi data dengan jaringan
IPv4,IPv6 atau gabungan keduany
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