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"[Pada penelitian ini telah dilakukan studi spektroskopi dari zeolit ZSM-5 mesopori terimpregnasi oksida kobalt secara komprehensif. Co/ZSM-5 mesopori telah menarik perhatian para peneliti untuk digunakan sebagai katalis heterogen dalam reaksi oksidasi parsial metana. Dalam penelitian ini dilakukan sintesis zeolit NaZSM-5 mesopori dengan metode double template dengan TPAOH sebagai agen pengarah struktur dan PDDA sebagai template mesopori. Sebagian zeolit NaZSM-5 dimodifikasi menjadi HZSM-5 melalui proses tukar kation dengan NH4+ yang dilanjutkan dengan kalsinasi pada suhu 550°C. Selanjutnya, zeolit NaZSM-5 dan HZSM-5 diimpregnasi dengan ion kobalt dan dikalsinasi pada 550°C membentuk Co/NaZSM-5 dan Co/HZSM-5. Lalu, zeolit mesopori NaZSM-5, HZSM-5, Co/NaZSM-5, dan Co/HZSM-5 dikarakterisasi secara ekstensif dengan XRD, SEM, AAS, FTIR, 27Al Solid State NMR, Microbalance, dan Surface Area and Pore Size Analyzer untuk menjelaskan pengaruh perbedaan sifat permukaan zeolit katalis terhadap fenomena perbedaan hasil reaksi katalisis oksidasi parsial metana dengan oksidator oksigen dan katalis zeolit mesopori Co/NaZSM-5 dan Co/HZSM-5 pada penelitian sebelumnya, di mana persen konversi metana menjadi metanol meningkat seiring dengan waktu pada Co/HZSM-5 namun sebaliknya pada Co/NaZSM-5 justru menurun seiring dengan waktu. Hasil analisis menunjukkan bawa keasaman zeolit ZSM-5 sebagai support katalis berpengaruh terhadap loading Co dan aktivitas katalis.

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Spectroscopy study of mesoporous ZSM-5 zeolite impregnated with cobalt oxides has been done comprehensively. Mesoporous Co/ZSM-5 has gained the researchers’ attention for being used as heterogeneous catalyst for partial oxidation of methane. In this research, mesoporous NaZSM-5 zeolite was synthesized by using double template method with TPAOH as structure directing agent (SDA) and PDDA as mesoporous template. Some of NaZSM-5 were modified to HZSM-5 through NH4+-exchange process followed by calcination at 550°C. NaZSM-5 and HZSM-5 zeolite were impregnated with cobalt ions and calcined at 550°C to form Co/NaZSM-5 and Co/HZSM-5. Then, mesoporous NaZSM-5, HZSM-5, Co/NaZSM-5, and Co/HZSM-5 zeolite were extensively characterized using XRD, SEM, AAS, FTIR, 27Al Solid Sate NMR, Microbalance and Surface Area and Pore Size Analyzer to explain zeolite surface characteristics influence on difference results from methane partial oxidation with O2 as oxidant using mesoporous Co/NaZSM-5 and Co/HZSM-5 zeolite as catalyst in recent research. In which by using Co/HZSM-5 as catalyst %conversion of methane to methanol increase by the time, but %conversion decrease by using Co/NaZSM-5. By analysis, it can be concluded that ZSM-5 zeolite’s acidity affect the loading of Co and catalyst activity.;Spectroscopy study of mesoporous ZSM-5 zeolite impregnated with cobalt oxides has been done comprehensively. Mesoporous Co/ZSM-5 has gained the researchers’ attention for being used as heterogeneous catalyst for partial oxidation of methane. In this research, mesoporous NaZSM-5 zeolite was synthesized by using double template method with TPAOH as structure directing agent (SDA) and PDDA as mesoporous template. Some of NaZSM-5 were modified to HZSM-5 through NH4+-exchange process followed by calcination at 550°C. NaZSM-5 and HZSM-5 zeolite were impregnated with cobalt ions and calcined at 550°C to form Co/NaZSM-5 and Co/HZSM-5. Then, mesoporous NaZSM-5, HZSM-5, Co/NaZSM-5, and Co/HZSM-5 zeolite were extensively characterized using XRD, SEM, AAS, FTIR, 27Al Solid Sate NMR, Microbalance and Surface Area and Pore Size Analyzer to explain zeolite surface characteristics influence on difference results from methane partial oxidation with O2 as oxidant using mesoporous Co/NaZSM-5 and Co/HZSM-5 zeolite as catalyst in recent research. In which by using Co/HZSM-5 as catalyst %conversion of methane to methanol increase by the time, but %conversion decrease by using Co/NaZSM-5. By analysis, it can be concluded that ZSM-5 zeolite’s acidity affect the loading of Co and catalyst activity.;Spectroscopy study of mesoporous ZSM-5 zeolite impregnated with cobalt oxides has been done comprehensively. Mesoporous Co/ZSM-5 has gained the researchers’ attention for being used as heterogeneous catalyst for partial oxidation of methane. In this research, mesoporous NaZSM-5 zeolite was synthesized by using double template method with TPAOH as structure directing agent (SDA) and PDDA as mesoporous template. Some of NaZSM-5 were modified to HZSM-5 through NH4+-exchange process followed by calcination at 550°C. NaZSM-5 and HZSM-5 zeolite were impregnated with cobalt ions and calcined at 550°C to form Co/NaZSM-5 and Co/HZSM-5. Then, mesoporous NaZSM-5, HZSM-5, Co/NaZSM-5, and Co/HZSM-5 zeolite were extensively characterized using XRD, SEM, AAS, FTIR, 27Al Solid Sate NMR, Microbalance and Surface Area and Pore Size Analyzer to explain zeolite surface characteristics influence on difference results from methane partial oxidation with O2 as oxidant using mesoporous Co/NaZSM-5 and Co/HZSM-5 zeolite as catalyst in recent research. In which by using Co/HZSM-5 as catalyst %conversion of methane to methanol increase by the time, but %conversion decrease by using Co/NaZSM-5. By analysis, it can be concluded that ZSM-5 zeolite’s acidity affect the loading of Co and catalyst activity.;Spectroscopy study of mesoporous ZSM-5 zeolite impregnated with cobalt oxides has been done comprehensively. Mesoporous Co/ZSM-5 has gained the researchers’ attention for being used as heterogeneous catalyst for partial oxidation of methane. In this research, mesoporous NaZSM-5 zeolite was synthesized by using double template method with TPAOH as structure directing agent (SDA) and PDDA as mesoporous template. Some of NaZSM-5 were modified to HZSM-5 through NH4+-exchange process followed by calcination at 550°C. NaZSM-5 and HZSM-5 zeolite were impregnated with cobalt ions and calcined at 550°C to form Co/NaZSM-5 and Co/HZSM-5. Then, mesoporous NaZSM-5, HZSM-5, Co/NaZSM-5, and Co/HZSM-5 zeolite were extensively characterized using XRD, SEM, AAS, FTIR, 27Al Solid Sate NMR, Microbalance and Surface Area and Pore Size Analyzer to explain zeolite surface characteristics influence on difference results from methane partial oxidation with O2 as oxidant using mesoporous Co/NaZSM-5 and Co/HZSM-5 zeolite as catalyst in recent research. In which by using Co/HZSM-5 as catalyst %conversion of methane to methanol increase by the time, but %conversion decrease by using Co/NaZSM-5. By analysis, it can be concluded that ZSM-5 zeolite’s acidity affect the loading of Co and catalyst activity., Spectroscopy study of mesoporous ZSM-5 zeolite impregnated with cobalt oxides has been done comprehensively. Mesoporous Co/ZSM-5 has gained the researchers’ attention for being used as heterogeneous catalyst for partial oxidation of methane. In this research, mesoporous NaZSM-5 zeolite was synthesized by using double template method with TPAOH as structure directing agent (SDA) and PDDA as mesoporous template. Some of NaZSM-5 were modified to HZSM-5 through NH4+-exchange process followed by calcination at 550°C. NaZSM-5 and HZSM-5 zeolite were impregnated with cobalt ions and calcined at 550°C to form Co/NaZSM-5 and Co/HZSM-5. Then, mesoporous NaZSM-5, HZSM-5, Co/NaZSM-5, and Co/HZSM-5 zeolite were extensively characterized using XRD, SEM, AAS, FTIR, 27Al Solid Sate NMR, Microbalance and Surface Area and Pore Size Analyzer to explain zeolite surface characteristics influence on difference results from methane partial oxidation with O2 as oxidant using mesoporous Co/NaZSM-5 and Co/HZSM-5 zeolite as catalyst in recent research. In which by using Co/HZSM-5 as catalyst %conversion of methane to methanol increase by the time, but %conversion decrease by using Co/NaZSM-5. By analysis, it can be concluded that ZSM-5 zeolite’s acidity affect the loading of Co and catalyst activity.]"

"ABSTRAK

Bentuk struktur bangunan tinggi yang terus berkembang menuntut keberadaan loncatan bidang muka untuk meningkatkan efisiensi dan estetika bangunan. Loncatan bidang muka dapat dicapai dengan menggunakan sistem balok kantilever lepas yang tidak saling terhubung satu sama lain, atau sistem balok transfer di mana setiap balok kantilever di setiap tingkat dihubungkan dengan kolom transfer. Penelitian ini membahas perbandingan respons seismik dari variasi sistem dan panjang bentang kantilever, jumlah tingkat dan kelengkungan yang dianalisis menggunakan ETABS v16.2. Selanjutnya akan disimpulkan signifikansi sistem kantilever dan kelengkungan berdasarkan periode getar, gaya geser tingkat, drift dan displacement, serta gaya dalam kolom dan balok.

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ABSTRACTThe development of highrise building structural shape requires vertical setback in order to enhance building efficiency and aesthetics. In this case, vertical setback can be achieved by using a system in which the cantilever beams are either not connected or connected to each other with a transfer column. The discussions of this study compare every seismic response of cantilever length and system, the number of stories and curvature to be varied. After being analyzed using ETABS v16.2, the significance of different cantilever system and curvature is concluded based on the vibration period, story shear force, drift and displacement, also the internal force of columns and beams.

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"Dengan adanya perubahan peraturan SNI 1726 “Standar perencanaan ketahanan gempa untuk struktur bangunan Gedung”, maka bangunan yang lama akan mengalami penambahan beban gempa. Untuk mengembalikan beban gempa ke nilai awal dapat dilakukan dengan menggunakan isolator. Untuk penelitian ini isolator yang digunakan ialah lead rubber bearing dan ditempatkan pada lantai paling atas bangunan lalu menambah beban diatas lead rubber bearing. Objek pada penelitian ini ialah bangunan dengan denah berbentuk L yang akan divariasikan sebanyak 10 model berisolator dan 1 model fix-based. Hasil dari penelitian ini akan menganalisa pengaruh variasi beban dan kekakuan lead rubber bearing terhadap respons struktur bangunan, Analisa yang digunakan ialah Analisa respons spektrum dengan parameter yang dibandingkan meliputi: periode getar, gaya geser tingkat, simpangan antar lantai dan pusat massa. Berdasarkan hasil penelitian menggunakan analisa respon spektrum, penggunaan lead rubber bearing dapat mengurangi gaya geser dasar akibat gempa berkisar antara 19-23

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With the amendment of SNI 1726 regulation "Standards for planning earthquake resistance for building structures", old buildings will experience additional earthquake loads. In order to restore the earthquake load to the initial value, it can be done using an isolator.The isolator that is used for this study is lead rubber bearing, and it is placed on the top floor of the building and then added an additional load at the top of lead rubber bearing. The object of this study is a building with an L-shaped plan with variation of 10 isolated models and 1 fix based model. The results of this study will analyze the structural response of buildings caused by variations in load and stiffness of lead rubber bearing on. The analysis used in this study was responses spectrum analysis with parameters that being compared covers: period of vibration, story shear, intersection between floor and center of mass. Based on the results of the study using response spectrum analysis, the use of lead rubber bearings can reduce the base shear due to earthquakes ranging from 19-23%."

"Peneliti dr. Jenny Bashirudin SpTHT, dan Moch.Arif Wicaksono SSi. Objek penelitian Supir Bajaj dan kendaraannya. Tempat Penelitian RSUPN Cipto Mangunkusumo, Jalan sekitar Jalan Diponegoro, Jalan Salemba Raya, Jalan Raden Saleh dan Jalan Cikini Raya serta gedung Pasca Sarjana Program Studi Opto Elektroteknika dan Aplikasi Laser Fakultas Teknik Universitas Indonesia. Perkembangan teknologi komputer yang semakin pesat, membuat manusia menjadi sangat terbantu dalam menyelesaikan perhitungan-perhitungan yang cukup sulit jika dilakukan dengan cara manual. Salah satu contoh adalah pemanfaatan komputer dalam menyelesaikan masalah DSP (Digital Signal Processing). Tanpa bantuan komputer, masalah ini akan sulit diselesaikan. Dari pencuplikan, filtering sampai pada pembuatan spektrum komputer sangat berperan penting, tentunya semua ini juga harus didukung oleh Algoritma yang efisien dan efektif. Dalam penyelesaian mencari spektrum dari kendaraan Bajaj ini, dibuat sebuah aplikasi dengan memanfaatkan algoritma FFT (Fast Fourier Transform). Algoritma ini diyakini cepat sekali dalam mengubah domain waktu menjadi domain frekuensi. Dari hasil penelitian didapat bahwa spektrum kendaraan Bajaj mempunyai intensitas dominan pada frekuensi 4000 Hz. "

"EXAFS (Extended X Ray Absorption Fine Structure) merupakan gejala osilasi koefisien absorpsi (μ) pada energi di atas ujung absorpsi pada eksperimen spektroskopi absorpsi sinar-X. Salah satu teori yang dapat menjelaskan gejala ini adalah teori hamburan berganda. Dalam teori ini, perhitungan μ dilakukan dengan melibatkan atom-atom tetangga dari atom pengabsorpsi sinar-X. Dalam tesis ini, perhitungan EXAFS dilakukan untuk ujung absorpsi K besi padat. Hasil perhitungan numerik dengan menggunakan sembilan atom dan nilai bilangan kuantum orbital l sampai dengan tiga, ternyata cukup mendekati hasil eksperimen."

"ABSTRAKHingga saat ini banyak penelitian yang membahas tentang standar teknologi generasi ke-5 agar jaringan selular dapat memberikan layanan yang lebih baik dibandingkan generasi komunikasi bergerak saat ini. Salah satu aspek yang menjadi standar teknologi 5G dan masih dikembangkan hingga saat ini adalah air interface. Orthogonal Frequency Division Multiplexing OFDM yang saat ini digunakan sebagai air interface teknologi generasi ke-4 memiliki kekurangan yang tidak mampu mendukung teknologi 5G, salah satu diantaranya adalah efisiensi spektrum yang masih buruk. Inilah yang menjadi latar belakang dilakukan berbagai riset untuk mencari kandidat air interface teknologi 5G. Filter Bank Multi Carrier FBMC adalah salah satu kandidat dengan keunggulan yaitu memiliki efisiensi spektrum yang lebih baik dibandingkan dengan air interface sebelumnya. Salah satu prototipe filter yang digunakan pada FBMC adalah filter Mirabbasi-Martin, karena kemampuan penurunan side-lobe yang baik. Walaupun dianggap cocok sebagai kandidat air interface, perbandingan antara FBMC menggunakan filter Mirabbasi-Martin dengan OFDM harus ditinjau pada beberapa parameter diantaranya bandwidth, daya main-lobe, daya side-lobe pertama dan frekuensi kerjanya. Skripsi ini akan membahas mengenai simulasi respon frekuensi FBMC menggunakan filter Mirabbasi-Martin dengan memvariasi overlap factor dan membandingkannya dengan OFDM pada spektrum frekuensi sub-band di bawah 1 GHz. Berdasarkan hasil simulasi didapatkan nilai overlap factor yang ideal untuk FBMC adalah 4, dengan bandwidth sebesar 125 kHz dan daya sebesar 36.12 dB pada main-lobe. Side-lobe pertamanya berada pada frekuensi 67.99 kHz dengan daya sebesar -3.7 dB.

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ABSTRACTVarious research has been conducted to produce better network and standards than the previous generation of mobile communication. One of those standard is air interface which still being developed until now. Orthogonal Frequency Division Multiplexing OFDM as the air interface used by the last generation of mobile communication has some drawbacks that will not support 5G technology such as low spectrum efficiency. This drawback has been encouraged to find candidates of 5G air interface. Filter Bank Multi Carrier FBMC is one of those candidates which has better spectrum efficiency. One of prototype filter that has good side lobe decaying is Mirabbasi Martin filter. Comparison of FBMC and OFDM should be investigated in term of bandwidth, main lobe power, side lobe power and its frequency. This bachelor thesis will discuss the frequency response simulation and performance of FBMC utilizing Mirabbasi Martin filter by varying the overlap factor and compare its results with OFDM on Telkomsel sub band spectrum below 1 GHz. From the simulation results, it is known that ideal overlap factor value for FBMC is 4 which acquire bandwidth 125 kHz with 36.12 dB on its main lobe power. The first side lobe is plotted on 67.99 kHz with 3.70 on its power."