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"Sistem komunikasi yang fleksibel, cepat dan reliable sangat dibutuhkan untuk mendukung teknologi informasi dan multimedia yang semakin berkembang. Oleh karena itu, diperlukan perkembangan dalam sistem komunikasi yang ada untuk memenuhi kebutuhan tersebut. Peningkatan data rate dan ke-reliable<.i>-an sistem dapat dipenuhi penurunan nilai BER (Bit Error Rate) dan memaksimalkan efisiensi spectrum frekuensi. Salah satu teknologi yang paling sesuai untuk memenuhi kebutuhan tersebut adalah teknologi spatial diversity MIMO-OFDM. Pada skripsi ini, simulasi dan analisis dilakukan pada sistem spatial diversity MIMO-OFDM dengan menggunakan alamouti encoder. Dalam aplikasinya, sistem ini didukung oleh teknik AMC untuk memaksimalkan kapasitas kanal dan menjaga keefektifan modulasi dan ECC (error control coding) yang digunakan. Teknik modulasi QPSK, 16-QAM dan 64-QAM serta convolutional encoding dengan coderate 2/3, ½ dan 1/3 menjadi pilihan modulasi dan ECC dalam teknik AMC. BER, throughput dan kapasitas kanal menjadi parameter unjuk kerja sistem dalam simulasi pada kondisi penerima diam (fixed) dan bergerak (mobile). Hasil simulasi menunjukkan bahwa pada semua parameter, spatial diversity MIMO-OFDM memiliki unjuk kerja yang lebih baik dari pada SISOOFDM. Kemudian, BER dan throughput pada sistem spatial diversity MIMOOFDM untuk kondisi fixed jauh lebih baik dari pada kondisi mobile. Dengan menggunakan AMC, throughput dapat ditingkatkan baik pada kondisi kanal yang buruk maupun pada kondisi kanal yang bagus.

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Flexibility, reliability and rapidity of communcation system are strongly needed by the rapidly development of information technology and multimedia system. Thus, communication technology must be developed to be matched with the needed. The increasing data rate and reliability of system can be reached by decreasing BER value and maximalize the efficiency of frequency spectrum. The reomended technology which can appoint to this needed is spatial diversity MIMO-OFDM system.

In this final assignment, simulation and analysis is done to spatial diversity MIMO-OFDM system which used alamouti encoder. In the application, this system is supported by adapative modulation and coding (AMC) technique to maximalize channel capacity by choosing the appropriate modulation and error control coding due to the channel condition. QPSK, 16-QAM and 64-QAM modulation technique and convoluitonal encoding with coderate 2/3, ½ and 1/3 are the choices in the modulation and error control coding. BER, throughput and channel capacity are the parameters to evaluate the performance of the system in fixed and mobile condition in the simulation.

Simulation results show that the spatial diversity MIMO-OFDM system has a better performance than SISO-OFDM at all of the parameters. BER and throughput in the spatial diversity MIMO-OFDM system has a better performance in fixed than mobile condidtion. By using AMC, throughput can be increased both in the bad and good channel condition."

"Pada tahun 2009, flu babi kembali menyerang berbagai negara di dunia. Organisasi Kesehatan Dunia (WHO) menetapkan wabah virus influenza A H1N1 sebagai pandemi global pada 11 Juni 2009. Setidaknya ada sekitar 18.449 orang di seluruh dunia yang meninggal akibat serangan virus ini. Kemudian pada tanggal 10 Agustus 2010 Badan Kesehatan Dunia (WHO) secara resmi mengumumkan pandemi flu babi di dunia telah berakhir dan berganti menjadi fase post pandemic Fase post pandemic ini fase paling tepat untuk menemukan antiviral yang dapat mengatasi infeksi virus ini. Salah satu antiviral yang telah ada yaitu amantadine dan rimantadine dilaporkan telah mengalami resistansi. Oleh karena itu perlu ditemukan antiviral baru untuk menggantikan amantadine dan rimantadine sebagai inhibitor protein M2 channel virus influenza A H1N1. Belakangan dilaporkan bahwa senyawa (1R,2R,3R,5S)-(-)-isopinocampheylamine memiliki kemampuan untuk menginhibisi protein M2 channel virus influenza A H1N1. Pada penelitian ini akan dilakukan modifikasi (1R,2R,3R,5S)-(-)-isopinocampheylamine secara in silico untuk mendapatkan inhibitor yang lebih baik. Terhadap protein M2 channel, dilakukan docking dengan tiga inhibitor standar dan 52 inhibitor modifikasi, serta dilakukan drug scan terhadap modifikasi inhibitor. Hasil docking didapatkan 3 inhibitor modifikasi terbaik yang mempunyai afinitas ikatan dan potensi inhibisi yang lebih baik dibanding ligan standar. Berdasarkan analisa drug scan, inhibitor modifikasi mempunyai sifat farmakologi yang baik, ditunjukkan oleh nilai drug likeness, drug score, bioavailabilitas oral, dan toksisitas.

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In 2009, swine flu attacked various countries in the world. World Organization (WHO) set a pandemic of influenza A H1N1 virus as a global pandemic on June 11, 2009. At least there are approximately 18,449 people worldwide who die from this virus attack. Then on August 10, 2010 World Health Organization (WHO) officially announced the swine flu pandemic in the world has ended and changed into post-pandemic phase. Post-pandemic phase is the most appropriate phase to find antiviral that can overcome the infection with this virus. One of the existing antivirals amantadine and rimantadine are reported to have experienced resistance. Therefore it is necessary to find new antiviral to replace amantadine and rimantadine as the M2 channel protein inhibitor of influenza A H1N1 virus. Later it was reported that compound (1R, 2R, 3R, 5S )-(-)- isopinocampheylamine have the ability to inhibit channel M2 protein of influenza A H1N1 virus.

This research will be modified (1R, 2R, 3R, 5S )-(-)-isopinocampheylamine in silico to obtain better inhibitors. Against the M2 protein channel, performed three inhibitor docking with standard and 52 inhibitors modifications, and also done a drug scan for modifications inhibitor. Docking results obtained three best binding affinity of modifications inhibitor and its potency of inhibition is much better than standard ligands. Based on drug analysis scan, the inhibitor of modification has a good pharmacological properties, indicated by the value of drug-likeness, drug score, oral bioavailability, and toxicity."

"Mobile WiMAX, yang dipandang sebagai pemimpin generasi keempat sebagai akses wireless, membutuhkan skema frequency reuse agar dapat menghasilkan jangkauan layanan yang luas. Namun, dengan adanya penggunaan skema frequency reuse, maka terdapat masalah berupa interferensi cochannel. Skripsi ini membahas tentang perancangan metode untuk mereduksi interferensi cochannel pada sistem Mobile WiMAX yang menggunakan prinsip MIMO-OFDM. Metode penanganan interferensi cochannel dilakukan dengan menggunakan metode adaptive beamforming dengan algoritma MMSE. Metode ini digabungkan dengan teknik Adaptive Modulation and Coding dimana dihasilkan throughput yang besar dengan tetap menjaga nilai error yang dihasilkan. Dari simulasi yang dilakukan, terlihat bahwa metode beamforming dapat menangani masalah interferensi cochannel.

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Mobile WiMAX, which will lead the 4-th generation wireless technology, needs frequency reuse scheme to give a wide coverage service. But, the use of frequency reuse scheme provides a problem called cochannel interference. The thesis describes about a method which is designed to reduce co-channel interference on Mobile WiMAX system which uses a MIMO-OFDM system. Interference rejection is done by using adaptive beamforming method that based on MMSE algorithm. The method is combined with Adaptive Modulation and coding technique that gives high throughput while minimizing the error. From the simulation, it is obtain that beamforming method can be used to reduce the cochannel interference."

"Kebakaran hutan merupakan salah satu bencana alam yang memiliki faktor kerugian yang sangat banyakdi Indonesia mulai dari segi ekonomi, politik sosial serta dari sisi lingkungan hidup sendiri. Satelit TERRA/AQUA yang membawa sensor Moderate Resolution Imaging Spectroradiometer (MODIS) merupakan satelit penginderaan jauh yang digunakan untuk beberapa penelitian, salah satu yang dapat digunakan adalah untuk ekstraksi data suhu permukaan yang bersifat regional. Dengan wilayah cakupan yang luas yakni 2330 km dan resolusi spasial 250 m serta resolusi spektral yang tinggi yakni 36 kanal maka diharapkan MODIS mampu untuk menampilkan citra satelit untuk wilayah yang luas dan waktu pengamatan yang maksimal. Selanjutnya data citra MODIS diekstraksi sehingga didapatkan nilai dari jumlah hot spot yang akan digunakan untuk megetahui pola persebaran ttik hot spot yang terjadi. Penelitian ini dilakukan untuk mengetahui pola persebaran titik hot spot yang terjadi selama 5 tahun,antara tahun 2004 sampai 2008 pada pulau Sumatera dan Kalimantan sedangkan kanal yang digunakan adalah kanal 31 dan 32.Berdasarkan hasil penelitian didapatkan peta persebaran data hot spot pulau Kalimantan dan Sumatera.Selain itu data persebaran hot spot yang terjadi di daerah Kalimantan dan Sumatera ternyata berkaitan erat dengan grafik curah hujan dan grafik perkembangan el- nino. Berdasarkan hal hal tadi dapat disimpulkan bahwa satelit TERRA/AQUA yang membawa sensor Moderate Resolution Imaging Spectroradiometer (MODIS) merupakan contoh satelit penginderaan jauh yang datanya dapat dimanfaatkan untuk mengetahui persebaran titik hot spot yang dapat digunakan untuk memonitoring bencana kebakaran hutan.

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Forest fire is a natural disaster that has a loss factor which is very lot in Indonesia in terms of economic, political, social and environmental side of their own. Terra satellite / sensor AQUA bring Moderate Resolution Imaging Spectroradiometer (MODIS) is a satellite remote sensing used for some research, one that can be used is to extract surface temperature data that are regional. With a wide coverage area of 2330 km and 250 m spatial resolution and high resolution Spectral channel 36 that is then expected to be able to show the MODIS satellite imagery for the region and a broad maximum observation time. Next MODIS image data obtained so that the value extracted from a hot spot that will be used to know distribution pattern a hot spot happened.

This research was conducted to know the distribution pattern of hot spot point going for 5 years, between the years 2004 until 2008 on Sumatra and Kalimantan island ,with the channel 31 is used and results obtained 32.Based on map data distribution hot spot island and Kalimantan Sumatera.Selain the hot spot data distribution that occurred in the area of Kalimantan and Sumatra was closely associated with rainfall graphs and charts the development of El Nino.

Based on the case before it can be concluded that satellite Terra / AQUA bring the sensor Moderate Resolution Imaging Spectroradiometer (MODIS) satellite is an example remote sensing data can be used for the distribution point hot spot that can be used for forest fire disaster monitor."

"Mechanical alloying (MA) was used to produce Ti-xMg alloys (x = 0, 2.5, 5, 7.5, 10 wt%Mg), and powders alloys of Ti-Mg were characterized by X-ray diffraction and Optical microscope. Investigation shows that the homogenous structure have not yet been obtained as milling Ti and Mg for 4 hours, but XRD traces indicated that mechanical alloying have produced Ti-Mg alloys as Mg peaks has disappeared from the traces. XRD results also showed that mechanical alloying and addition of Mg have direct effect on XRD broadening. Powder alloys were compacted using severe plastic deformation method, ECAP. Using Archimedes principle the density of Ti-Mg solid samples were measured and results shows that the density decreased as Mg content increases. Relative density on compacted powders indicates that ECAP has produced in excess of 98% density on each sample, and annealing improved the density. Microstructure observation using SEM shows that ECAP has produced good inter-particles boundaries as well as some porosity and undissolved Mg particles can be observed. After annealing there is improvement in boundaries in samples containing Mg, but at the same time cause segregation of Mg, which indicates diffusion of Mg occurs faster during annealing at 600_C. Mechanical properties measurement was conducted by ball indentation test method on annealed and un-annealed bulk samples, and the result were studied and analysed carefully, however, the final result of mechanical properties were not well understood and still require further and deeper investigation in the future."

"Manajemen Fakultas Ilmu Komputer Universitas Indonesia (Fasilkom UI) memiliki kebutuhan akan data alumni dalam jumlah yang cukup besar. Data yang dibutuhkan juga beragam dan ditujukan untuk berbagai kepentingan, diantaranya adalah kepentingan akreditasi akademik serta kerja sama akademik. Sayangnya, data alumni yang tersimpan pada Sistem Informasi Akademik NextGeneration (SIAKNG) sebagai sumber data utama sudah tidak lagi up-to-date dan tidak dapat diperbarui secara mandiri oleh alumni terkait. Untuk mengatasi masalah tersebut, sebuah sistem alumni berbasis website bernama ILUNI12 Channel dikembangkan. Akan tetapi, berdasarkan wawancara yang dilakukan kepada Manajemen Fasilkom UI, saat ini sistem masih memiliki kekurangan dan belum dapat memenuhi kebutuhan mereka. Selain Manajemen Fasilkom UI, pengurus ILUNI Fasilkom UI dan para alumni sendiri juga mengalami kesulitan dalam memperoleh data alumni untuk kebutuhan mereka. Penelitian ini ditujukan untuk mengembangkan solusi atas permasalahan yang dialami dengan menggunakan agile methodology sebagai metodologi penelitian. Penelitian ini mengidentifikasi masalah dan kebutuhan menggunakan metode kualitatif. Masalah yang diidentifikasi dikelompokkan menjadi dua masalah utama, yaitu masalah terkait data gathering dan data retrieval. Berdasarkan masalah-masalah tersebut, penelitian ini mengajukan proposal solusi serta rancangan solusi dari aspek teknis. Melalui rancangan solusi tersebut, penelitian ini berhasil mengimplementasi solusi berupa fitur-fitur data gathering dan data retrieval pada sistem ILUNI12 Channel. Penelitian ini kemudian mengevaluasi solusi dengan melakukan usability testing serta user acceptance testing kepada satu pihak manajemen dan lima orang alumni. Hasil kuesioner system usability scale memiliki nilai rata-rata 85.83 dengan grade scale B. Grade ini menunjukkan bahwa desain dari fitur-fitur yang diimplementasi sudah dapat diterima dengan baik oleh pengguna. Selain itu, responden penelitian juga menyatakan bahwa fitur-fitur yang diimplementasi sudah dapat memenuhi kebutuhan dan menyelesaikan masalah yang dihadapi.

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The Management of the Faculty of Computer Science, University of Indonesia (Fasilkom UI) has a need for a large amount of alumni data. The data required are varied and are intended for various purposes, including the interests of academic accreditation and academic cooperation. Unfortunately, the alumni data stored in the NextGeneration Academic Information System (SIAK-NG) as the main data source are no longer up-to-date and cannot be updated independently by the alumni. To solve this problem, a website-based alumni system called ILUNI12 Channel was developed. However, based on interviews conducted with Management of Fasilkom UI, the current system still has shortcomings and has not been able to meet their needs. Apart from Management of Fasilkom UI, ILUNI Fasilkom UI administrators and alumni themselves also experienced difficulties in obtaining alumni data for their needs. This research is aimed at developing solutions to the problems experienced by using agile methodology as a research methodology. This study identifies problems and needs using qualitative methods. The identified problems are grouped into two main problems, namely problems related to data gathering and data retrieval. Based on these problems, this research proposes a solution proposal as well as a solution design from the technical aspect. Through this solution design, this research succeeded in implementing a solution in the form of data gathering and data retrieval features on the ILUNI12 Channel system. This research then evaluates the solution by conducting usability testing and user acceptance testing on one management and five alumni. The results of the system usability scale questionnaire have an average score of 85.83 with a B grade scale. This grade indicates that the design of the implemented features has been well received by users. In addition, research respondents also stated that the features that were implemented were able to solve the problems at hand."

"The volume dwells on the major issues of mechanical stress influencing the ion channels and intracellular signaling pathways. The book presents not only the latest achievements in the field but also brings the problem closer to the experts in related medical and biological sciences as well as practicing doctors. Knowledge of the mechanisms which underlie these processes is necessary for understanding of the normal functioning of different living organs and tissues and allows to predict changes, which arise due to alterations of their environment, and possibly will allow to develop new methods of artificial intervention. This book presents the problem will attract more attention to it both from researchers and practitioners and will assist to efficiently introduce it into the practical medicine."

"Powerline Communication (PLC) Systems intents to use the mains network in vehicles for high-speed datatransmission. Carrier frequencies in the range of MHz are required to establish data rates of some megabits per second.In this paper, typical reference channels extracted from channel measurements are presented and computation results oftheir capacities according to Shannon’s theorem are presented. Furthermore, the effect of limitations of frequencyrange and power spectral density of transmitted signal on achievable capacity is investigated. This paper outlines anassessment for theoretical channel capacity and achievable data rates of vehicular PLC transmission schemes. Finally,EMC (Electromagnetics Compatibility) constraint according to CISPR 25 (Comite International Special desPerturbations Radioelectrique – The International Special Committee on Radio Interference) is deeply considered."

"This research was aimed gaining intormation wether the aspects of communication have pocitive influence towards productivity and performance of the lectures....."