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"The book focuses on the orbital dynamics and mission trajectory (transfer or target trajectory) design of low-energy flight in the context of modern astrodynamics. It investigates various topics that either offer new methods for solving classical problems or address emerging problems that have yet to be studied, including low-thrust transfer trajectory design using the virtual gravity field method; transfer in the three-body system using invariant manifolds; formation flying under space-borne artificial magnetic fields; and the orbital dynamics of highly irregular asteroids. It also features an extensive study of the orbital dynamics in the vicinity of contact binary asteroids, including the 1:1 ground-track resonance, the equilibrium points and their stability, and the third-order analytical solution of orbital motion in the vicinity of the non-collinear equilibrium point."

"There is increasing attention to the need to preserve the global environment. This book summarizes research done in this area based on a number of important collaborative projects in Beijing, Shanghai and Shenzhen, China. It features case studies and recommendations for different approaches to environmentally responsive sustainable building."

"This book enables readers to achieve ultra-low energy digital system performance. The authors main focus is the energy consumption of microcontroller architectures in digital (sub)systems. The book covers a broad range of topics extensively: from circuits through design strategy to system architectures. The result is a set of techniques and a context to realize minimum energy digital systems. Several prototype silicon implementations are discussed, which put the proposed techniques to the test. The achieved results demonstrate an extraordinary combination of variation-resilience, high speed performance and ultra-low energy.Presents a full bottom-up micro-electronics approach: circuit-level, design strategy and CAD automation, architecture optimizationMotivates discussion with simulation results and/or measurements in an advanced nanometer CMOS processCompares traditional circuit/design/architecture techniques and state-of-the-art, setting the landscape of current best performance and how it can be improved"

"Energy methods in dynamics is a textbook based on the lectures given by the first author at Ruhr University Bochum, Germany. Its aim is to help students acquire both a good grasp of the first principles from which the governing equations can be derived, and the adequate mathematical methods for their solving. Its distinctive features, as seen from the title, lie in the systematic and intensive use of Hamilton's variational principle and its generalizations for deriving the governing equations of conservative and dissipative mechanical systems, and also in providing the direct variational-asymptotic analysis, whenever available, of the energy and dissipation for the solution of these equations. It demonstrates that many well-known methods in dynamics like those of Lindstedt-Poincare, Bogoliubov-Mitropolsky, Kolmogorov-Arnold-Moser (KAM), Wentzel–Kramers–Brillouin (WKB), and Whitham are derivable from this variational-asymptotic analysis. This second edition includes the solutions to all exercises as well as some new materials concerning amplitude and slope modulations of nonlinear dispersive waves."

"This book is based on the 18 invited tutorials presented during the 27th workshop on Advances in Analog Circuit Design. Expert designers from both industry and academia present readers with information about a variety of topics at the frontiers of analog circuit design, including the design of analog circuits in power-constrained applications, CMOS-compatible sensors for mobile devices and energy-efficient amplifiers and drivers. For anyone involved in the design of analog circuits, this book will serve as a valuable guide to the current state-of-the-art.Provides a state-of-the-art reference in analog circuit design, written by experts from industry and academia;Presents material in a tutorial-based format;Covers the design of analog circuits in power-constrained applications, CMOS-compatible sensors for mobile devices and energy-efficient amplifiers and drivers."

"Proses produksi yang ramah lingkungan dikembangkan untuk mengolah limbah kaca menjadi blok kaca dengan kandungan energi yang rendah. Tingkat efisiensi energi blok kaca tersebut dicapai dengan tingkat transmisi panas secara konduksi (U) sebesar ≤3,177 W/m2.K maupun radiasi (SHGC) ≤ 0,25 serta tingkat transmisi cahaya tampak (VT) ≥ 0,27. Rongga diaplikasikan untuk menurunkan U dengan penurunan VT secara tidak signifikan. Metode analitis dipilih untuk menghitung U model blok kaca tanpa mempertimbangkan pengaruh konveksi. Untuk menganalisis VT dan SHGC setiap model dilakukan simulasi tingkat terang dan beban kalor di dalam bangunan dengan program Ecotect. Pengaruh konveksi diamati dari hasil simulasi CFD yang menggambarkan kecepatan aliran udara di dalam rongga dan gradien suhu pada blok kaca. Efisiensi yang dicapai oleh aplikasi model blok kaca ini mencapai 96% lebih rendah dibandingkan dengan pemakaian energi pada aplikasi dengan kaca 3 mm. Studi simulasi ini masih mengabaikan keberadaan perekat antar lapisan kaca yang berpotensi menurunkan VT dan SHGC blok kaca.

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An environmentally friendly process was developed to produce a low embodied energy glass block from waste glasses. The energy efficiency of the glass block is represented by its thermal conductance (U) 3.177 W/m2.K and solar transmittance (SHGC) ≤0.25 as well as visible light transmission (VT) ≥0.27. A cavity was applied to reduce U value while insignificantly reducing VT. Analytical method was used to calculate the U value of glass blocks, ignoring the effect of convection. Ecotect program was used to analyze light level (VT) and heat load (SHGC) of each model.

Effect of convection was simulated using a CFD program, which showed air velocity inside the cavity and temperature gradient in glass blocks. Comparing to an application with 3 mm float glass, energy efficiency obtained through applying the glass blocks could reach 96%. This simulation study ignored the presence of adhesive among glass layers that potentially reduces the VT and the SHGC of the glass blocks."

"Sekitar 60 persen polusi yang ada di Indonesia di akibatkan oleh pemakaian motor dan mobil yang menggunakan bahan bakar minyak. Oleh karena itu, Kementerian Perhubungan menerbitkan aturan penggunaan kendaraan alternatif dan percepatan kendaraan listrik. Baterai merupakan media penyimpanan energi untuk kendaraan listrik. Baterai diperlukan battery management system supaya dapat dipantau, dan dipelihara. Pada skripsi ini, penulis melakukan studi literatur yang memiliki hubungan dengan Battery Management System, Flutter, Bluetooth Low Energy, dan mikrokontroller. Setelah itu penulis melakukan perancangan dan pembuatan aplikasi penampil State of Charge berbasis android menggunakan Flutter sebagai framework. Hasil aplikasi tersebut dilakukan pengujian dengan menggunakan data dummy yang dikirimkan oleh Battery Management System melalui bluetooth. Hasil uji data dummy dilakukan analisis dan ditarik kesimpulan bahwa aplikasi penampil State of Charge berbasis android terbukti berhasil.

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Around 60 percent of pollution in Indonesia is caused by the use of motorcycles and cars that use fuel oil. Therefore, the Ministry of Transportation issued regulations for the use of alternative vehicles and the acceleration of electric vehicles. Battery is an energy storage medium for electric vehicles. Batteries need a battery management system so that they can be monitored and maintained. In this thesis, the author conducts a literature study that has a relationship with the Battery Management System, Flutter, Bluetooth Low Energy, and a microcontroller. After that, the author designed and made an Android-based State of Charge display application using Flutter as a framework. The results of the application were tested using dummy data sent by the Battery Management System via bluetooth. The results of the dummy data test were analyzed and concluded that the Android-based State of Charge display application proved successful.

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"ABSTRAKSaat ini industri konstruksi dan bangunan memegang peranan penting. Namun, praktik-praktik pembangunan diakui sebagai salah satu kontributor utama permasalahan lingkungan terutama dalam pengeluaran energi listrik. Fakultas Teknik UI merupakan salah satu pemakaian listrik terbesar di kampus UI. Maka dengan hal tersebut, dibutuhkan suatu energi alternatif untuk mengurangi biaya operational FT UI. Salah satunya adalah dengan pemanfaatan ground reaction force pada aktivitas berjalan sebagai alternatif di FT UI. Berdasarkan dari hasil penelitian sebelumnya, nilai Ground Reaction Force (GRF) dan Energi Potensial saat manusia melakukan aktivitas berjalan perubahan ketinggian lantai sedalam 5 cm menghasilkan nilai yang terbesar. Maka dengan hal tersebut, perlu adanya analisis biomekanik pada aktivitas berjalan normal sebagai atribut perancangan energy floor (perubahan ketinggian pada lantai) dengan inverse dynamics model untuk mengetahui tingkat kenyamanan pada aktivitas berjalan terhadap faktor ketinggian lantai dinamis tersebut dengan melakukan perhitungan joint moment pada knee dan ankle. Berdasarkan hasil penelitian didapatkan hasil bahwa rata-rata nilai joint moment pria Indonesia pada saat berjalan pada lantai dinamis 5 cm mempunyai nilai lebih kecil daripada lantai statis. Sehingga dapat disimpulkan tingkat kenyamanan pada sendi pada segmen leg dan foot masih berada kondisi nyaman ketika berjalan di lantai dinamis 5 cm.

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ABSTRACTCurrently, the building and construction industry play an important role. However, development practices recognized as one of the main contributors to environmental problems especially in the production of electrical energy. Faculty of Engineering Universitas Indonesia (FT UI) is one of the largest on-campus electrical consumption of the UI. Because of that, needs an alternative energy to reduce the operational costs of the FT UI. One of them is with utilization of Ground Reaction Force (GRF) on the activity of walking as an alternative at FT UI. Based on the results of previous study, the value of GRF and the potential energy of human gait (walking) on the floor height change as deep as 5 cm yield the greatest value. Therefore, the need for analysis of biomechanics in human gait as design attributes of energy floor (elevation changes on the floor) with inverse dynamics model to find out the level of comfort on the human gait to the floor height of the dynamic factor by doing the calculation of knee and ankle joint moments. Based on the results that the average value of joint moment male Indonesian that walked on the dynamics floor has a value of 5 cm smaller that static floor. In summary, the comfort level can be summed up in the joint segment of the leg and foot were still comfortable conditions when walking on the dynamics floor of 5 cm."

"Untuk menjaga kedaulatan NKRI dari gangguan keamanan di laut ataupun klaim sepihak atas pulau terluar maka dibutuhkan sarana pengamanan yang memadai. Suatu kapal patroli cepat tanpa awak atau US V (Unmanned Surface Vehicle) dapat menjadi solusi. US V dapat dipersenjatai dengan rudal, senapan mesin, ataupun torpedo. US V bergerak secara autonomous dengan menggunakan sistem navigasi yang menerapkan algoritma waypoint dan dengan menggunakan remote control. Permasalahan pada penelitian ini dibatasi pada mission system USV yang dibangun.Penelitian ini menggunakan metode studi literatur untuk mendapatkan rancang bangun mission system USV Hasil yang dzperoleh berupa kebutuhan komponen-komponen yang akan dipasangkan pada wahana US V sesuai dengan misi yang akan diembannya. Dalam penelitian ini, terdapat sepuluh perangkat elektronik utama yang digunakan, yaitu Inertial Reference System dan Global Positioning System (IRS/GPS), Electro Optical/Infra Red (EO/IR), Radar, Automatic Identifcation System (AIS), Alission Computer; Video Acquisition, Ethernet Data Bus, Wzreless Digital Data Link, Sonar, dan Power Supply."

"Pengembangan energi alternatif yang tidak habis pakai telah lama menjadi perhatian utama, khususnya pemanfaatan energi matahari dengan menggunakan sel surya. Berbagai isu mengenai ketersediaan bahan bakar yang semakin berkurang dan pentingnya kelestarian lingkungan, membuat para pengusaha mencoba mengembangkan sel surya melalui proyek-proyek dengan investasi yang sangat besar. Sebagai gantinya, sel surya yang memiliki sumber energi tak terbatas dan tidak ada polusi, terus dikembangkan. Satu hal yang dicoba untuk selalu ditingkatkan hingga saat ini adalah efisiensi sel surya dalam mengubah energi sinar matahari menjadi energi yang dapat langsung dikonsumsi. Disain dasar dari perancangan sel surya kali ini, dibuat untuk mendukung modul berefisiensi tinggi menurut dasar-dasar perancangan yang sudah ada, seperti surface texturing. Disain modul berefisiensi tinggi memanfaatkan concentrator dan cahaya yang dibagi menjadi dua tingkatan energi spektrum cahaya yaitu spektrum cahaya rendah dan spektrum cahaya menengah. Program simulasi yang digunakan adalah perangkat lunak PC1D. Concentrator berguna untuk mengkonvergensi cahaya matahari sehingga daya yang dihasilkan menjadi lebih besar, menurut perbandingan luas concentrator dan luas permukaan sel surya. Spektrum cahaya dibagi menjadi dua tingkatan energi menggunakan sebuah prisma dan dikonversi dengan sel surya yang berbeda. Dengan demikian, perlu mempelajari sifat-sifat meterial dan karakteristik cahaya untuk mendisain kedua buah sel surya. Sel surya level energi menengah lebih mengoptimalkan penyerapan cahaya biru pada kedalaman persambungan sebesar 0,65 µm, sedangkan untuk sel surya level energi rendah lebih mengoptimalkan penyerapan cahaya merah pada kedalaman persambungan sebesar 4 µm. Dari hasil uji coba, akan diperoleh efisiensi total yang merupakan penjumlahan efisiensi dari kedua buah sel surya, yaitu sebesar 46,18 %.

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The development of unlimited resources has become hot topics specifically for solar energy use employing solar cells. The world's energy crisis and environmental issues have been a headline in this present. It makes the developers invest their funds in solar cells research programs. The result is the device that can convert solar irradiation into other energy and without pollution. One of the most important measurements for solar cells is the efficiency.

Basic concept for the designs refers to the existing standard designs, such as surface texturing. Solar cells design equips the high efficiency modul. Further, the standard designs are combined with high efficiency modul using concentrator to absorp light more effective. The light spectrums are divided into two levels those are called middle energy spectrums and low energy spectrums. Solar cells are designed using modified PC1D software.

Concentrator is used for collecting solar irradiation and to produce higher power output from the ratio of concentrator?s width and solar cell?s surface area. The energy spectrums are splitted using prism and converted by different cell materials. Studying the material properties and light characteristics is needed to design both solar cells. Middle energy solar cell optimizes blue spectrum absorption with 0,65 µm of junction depth. Low energy solar cell optimizes red spectrum absorption with 4 µm of junction depth. The total efficiency which is the sum efficiency from both solar cells is 46,18 %."