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Gunawan Wibisono
"The BER performance of trellis coded (TC) 8PSK with 2-branch selection (SC) and maximal ratio combining (MRC) diversities on mobile satellite communication system, which channel characterized by Nakagami fading channel is investigated. The special case of 2 branch SC and MRC diversities on independent and spatially correlated Nakagami fading are analyzed in detail, It is shown that the BER performance of TC 8PSK with diversity is better than that system without diversity, and the BER performance of system with diversity increases with increasing the Nakagami fading parameter m. Although the correlation between branches causes signal-to-noise ratio (SNR) loss relative to uncorrelated fading case for 2 branches SC and MRC diversities, the SC and MRC diversities can lead the diversity gain, that is, the improvement of BER performance of TC 8PSK with diversity is obtained over the TC 8PSK without diversity. In addition, the effect of antenna separation which causes cross correlation between the fading signals envelops on the performance of TC 8PSK with 2 branch SC and MRC diversities is also considered."
Fakultas Teknik Universitas Indonesia, 2000
LP 2000 37
UI - Laporan Penelitian  Universitas Indonesia Library
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Gunawan Wibisono
"The simplest model that is frequently used for a transmission channel is the additive white Gaussian noise (AWGN) channel model. In this model the received signal is the sum of the transmitted signal and Gaussian noise. The simple channel model has great theoretical and practical importance and is an accurate model for many communication channels, such as satellite and deep space communication channels. In many communication systems, however, the channels are subject to various impairments in addition to the additive noise. For these channels the simple model of AWGN is no longer valid and one must consider more practical and complex channel models. One of the such channel types which frequently occur in radio communication is the fading channel.
In mobile radio communication system, the propagation between a base and a mobile station is not only by a direct line-of-sight path, but via many paths. These propagation paths depend largely on the. scattered reflection from many obstacles near the base and mobile stations. The received signal, at any place, consist of a large number of waves arriving from many directions. These multipath waves interfere and produce a varying field strength. The base station receiver experience similar fading as the mobile transmitter moves. The signal fluctuation rate is proportional to the vehicle speed. In many fading channels, in addition to the diffused multipath fading, there exists a dominant line-of-sight (direct) signal component. Denoting the direct component by Acos(2πfct), the received signal then can be written as r(t)= (A + a1 (t)) cos(2πfct) + aQ sin(2πfct)"
Depok: Fakultas Teknik Universitas Indonesia, 2000
LP-pdf
UI - Laporan Penelitian  Universitas Indonesia Library
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Gunawan Wibisono
"Trellis coded modulation (TCM) formats with their excellent bandwidth and power efficiency have been widely employed in various communication systems. For mobile satellite communications, trellis coded (TC) M-ary phase shift keying (MPSK) is the primary candidate modulation technique. In the first generation mobile satellite systems, co-channel interference (CCI) does not pose a serious problem. However, second generation systems are expected to reuse frequency to increase the orbit slot spectral efficiency. Then the CCI from adjacent beams and adjacent satellite will be dominant factor determining the system performance and overall capacity. Mobile satellite communication is also suffered from strong variations of the received signal power due to the multipath fading. Typically, mobile satellite channels are modeled as Rician or Nakagami fading; that is the received signal consists of a constant line of sight signal component and a Rayleigh distributed diffuse signal component. Therefore, the performance of system on mobile satellite channels is subject to both fading and CCI.
TCM and antenna diversity are two attractive methods to combat fading and CC1 effects in the mobile satellite communication systems. The research focuses on the using of TCM and antenna diversity to combat the fading and CCI effects on mobile satellite system, and analyze their performance characterized by bit error rate (BER). Because of multipath propagation , the mobile satellite communication channel is modeled as a Rician or Nakagami fading channel. This report, the BER performance of TC asymmetric MPSK with CCI and TC asymmetric MPSK with diversity on mobile satellite communication systems will be investigated and analyzed.
First, the BER performance of TC- asymmetric MPSK in the presence of undesired CCI with multiple interferers and fading channel is investigated. The fading statistic for desired signal is Nakagami fading and the undesired interference signals are Rayleigh fading. We assume that all the interferers are unmodulated because most of errors are produced by Rayleigh fading itself rather than the modulating sequence. This model assumes that all interfering signals have aligned symbol timing and no cross channel interference symbol interfering (ISi) effects. The desired signal is assumed to have Nakagami distribution implying that a dominant multipath exists in transmission. The desired and the interfering carrier have no phase coherence. We derive the BER performance of TC asymmetric MPSK in the presence CCI and fading channels by using the first error event method. It is shown that the BER performance of TC asymmetric MPSK in the presence of CCI is better than that of system with asymmetric MPSK. The BER performance of TC asymmetric MPSK is improved as increasing either the Nakagami fading parameter or the value of signal-to-interference ratio (SIR). As the Nakagami fading parameter is increased the phase signal of MPSK is also increased.
Second, the BER performance of TC MPSK with 2 branch selection combining (SC) and maximal ratio combining (MRC) diversities on independent and spatially correlated Nakagami fading channel are investigated. The upper bound bounds using the transfer function bounding technique are derived and several numerical results are shown. Is shown that the BER performance of TC 8PSK with MRC diversity is better than that of system with SC diversity. Although the correlation between branches causes the signal-to-noise ratio (SNR) loss (relative to independent fading case) for SC and MRC diversities, the diversity can lead to achieve the diversity gain compared to the system without diversity.
Third, the BER performance of TC 8PSK in the presence of undesired CCI with multiple interferers and fading channel is investigated by using computer simulation. The fading statistic for desired signal is Nakagami fading and the undesired interference signals are characterized by Rayleigh fading. The I3ER performance of TC 8PSK in the presence CC1 and fading channels is simulated by using the first error event method. It is shown from the result that the simulation result of the performance of TC 8PSK in the presence CCI and fading channels is closed to the analytical result."
Depok: Fakultas Teknik Universitas Indonesia, 2001
LP-pdf
UI - Laporan Penelitian  Universitas Indonesia Library
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Gunawan Wibisono
"ABSTRAK
Seringkali didapati kasus-kasus pelanggaran hukum di Indonesia yang sebenarnya belum tentu termasuk kategori pelanggaran Subversi. Namun oleh pemerintah selaku penguasa politik kepada para pelanggar pidana tersebut kerapkali dijerat dan dikenakan dengan isi pasal-pasal UU No.11/PNPS/1963 tentang Pemberantasan Kegiatan Subversi. Kejadian ini telah terdapat pada masa Pemerintah Orde Lama, hingga diteruskan oleh Pemerintah Orde Baru sekarang ini, yang menimbulkan berbagai polemik di pihak yang pro maupun kontra.
Bahkan para Cendekiawan Politik dan Hukum (Dr. Burhan Magenda, Arbi Sanit, dan Prof. Dr. Sri Sumantri, SH), menyatakan bahwa isi pasal UU No.l1/PNPS/1963 tersebut terlalu luas jangkauannya sehingga tidak ada batasan-batasan yang jelas dan tegas pada pasal-pasalnya yang dapat menjerat siapa saja dan kapan saja dan kurang relevan dengan pekermbangan Demokratisasi dan Hak Asasi Manusia (HAM) dewasa ini.
Menurut pendapat nara sumber hukum dari Universitas Indonesia (Prof. Dr. Bintan R. Saragih, SH. dan Nara sumber Undang-undang Anti Subversi (Dr.Loebby Loqman, SH.) mengatakan bahwa Isi pasal-pasal UU No.ll/PNPS/1963 terdiri dari 20 pasal yaitu pasal 1 s/d. 20 dan 6 Bab yaitu Bab 1 s/d. V perlu dibatasi (limitatif), karena bila hal itu tetap diberlakukan, maka isi pasal UU No.17./PNPS/1963 ini dianggap telah dipengaruhi budaya politik otoriter yang terdapat pada pasal 1,2,3,7,11 dan 17 yang pada inti isinya memperkokoh kedudukan Presiden selaku penguasa politik. Pengaruh budaya politik Feodal terdapat pada pasal 13 (2), yang berintikan adanya kedudukan penguasa politik yang tidak ingin dikritik atau dikontrol oleh masyarakat, melainkan harus dihormati dan di patuhi oleh seluruh masyarakat; dan pengaruh budaya politik patrimonial nampak terdapat pada pasal 13 (2) yang pada isinya adalah keharusan dari pihak masyarakat/rakyat untuk loyal dan patuh tunduk pada senioritas yaitu penguasa politik (presiden) tanpa ada kontrol pengawasan dari masyarakat/rakyat.
Tujuan penelitian dengan menggunakan kerangka pikir kualitatif, untuk mengetahui secara jelas benarkah sifat patrimonial, Feodal dan Otoriter yang melekat pada isi UU Noll/PNPS/1963 akibat dari adanya pengaruh Budaya Politik Patrimonial, Feodal dan Otoriter yang diwariskan oleh para penguasa politik Jawa (Raja-raja Jawa Mataram) yang secara langsung atau tidak langsung telah diwariskan dan diikuti serta diterapkan oleh para Penguasa Politik, sehingga memberikan tempat yang subur bagi tumbuh dan berkembangnya budaya politik subyek (menurut G.A. Almond dan Sindey Verbs). Seperti halnya Presiden Soekarno sebagaimana telah dikemukakan dalam kerangka teori Budaya Politik yang digambarkan oleh Clifford Gertz, Arief Budiman, Miriam Budiarjo, Marbanggun Hardjowirogo, Sukarna, Eberhard Puntsch, Ralf Dahrendorf, Gabriel A. Almond, dan Sidney Verbs, Niniek Suparni, dan sebagainya, dengan menggunakan kerangka piker kualitatif.
Para nara sumber politik dan nara sumber hukum tersebut di atas telah menggambarkan bahwa betapa otoriternya kepemimpinan Presiden Soekarno pada saat pemerintah dengan sistem politik Demokrasi Terpimpin yang membuat dan memberlakukan Penetapan Presiden (Penpres/PNPS) No.11 tahun 1963 tentang Tindak Pidana Subversi tanpa persetujuan DPRS yang perannya dimandulkan (lemah) yang kemudian ditetapkan menjadi UU No.11/PNPS/1963. Permasalahan di mana pada isi pasal-pasal UU No.11/PNPS/1963 tersebut memiliki jangkauan sangat jauh dan luas langkah represifnya dan hanya menguntungkan Penguasa Politik / presiden), dikarenakan pasal-pasalnya bersifat karet yang dapat menjerat siapa saja.
Untuk menjawab permasalahan tersebut di atas perlu dibuktikan dalam penulisan tesis ini diungkapkan secara rinci proses pembahasan pembentukan isi UU No.ll/PNPS/1963 tentang pernberantasan kegiatan Subversi sejak latar belakang pembentukannya, sejarah pembentukannya, sampai budaya politik yang mempengaruhinya yang cukup menarik dipelajari karena menimbulkan pro dan kontra."
1998
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Gunawan Wibisono
"Perumusan masalah penelitian ini adalah menelaah bagaimana hubungan relasional antara nasabah dengan perusahaan asuransi dapat mempengaruhi usaha pemulihan layanan. Penelitian mengacu pada penelitian Hess et al (2003) yang mengembangkan suatu model dimana menjelaskan mengenai pengaruh hubungan relasional terhadap kepuasan setelah teljadi kegagalan layanan. Model ini memperlihatkan bahwa nasabah yang berkeinginan unluk memiliki hubungan yang berkelanjutan akan mengharapkan usaha pemulihan yang tinggi. Sejalan dengan expectancy-disconfirmation paradigm semakin tinggi harapan atas usaha pemulihan yang dilakukan perusahaan asuransi maka akan semakin rendah tingkat kepuasan nasabah setelah terjadi pemulihan layanan (Oliver 1980; Tse dan Wilson 1988).
Hasil penelitian memberikan implikasi manfaat bagi teori mengenai hubungan relasional, kegagalan layanan dan kepuasan nasabah setelah usaha pemulihan. Penelitian ini mengungkapkan bahwa harapan nasabah untuk mengembangkan hubungan relasional yang berkelanjutan harus diimbangi dengan usaha perusahaan atas pemulihan layanan setelah terjadi kegagalan layanan.
Key point-nya adalah bila perusahaan menginginkan hubungan yang berkelanjutan dengau nasabah, maka strategi usaha pemulihan harus disesuaikan dengan jenis kegagalan layanan yang teljadi. Kecepatan, kesigapan, memperbaiki masalah, permintaan maaf sampai kemudahan pengajuan klaim dalam satu atap menjadi hal yang diutamakan oleh nasabah.

This research investigates how customer relationship with insurance company affects customer satisfaction after recovery performance. Our conceptual model is inspired by previous research by Hess et al (2003), which proposed that customer relationship will shape expectation on recovery after service failure. Customers whom expect to have longer relationship will also be expecting greater and equal service recovery.
The empirical results showed that customer with higher expectation of relationship continuity had lower satisfaction with organization. Consistent to expectancy-disconfirmation paradigm, the higher customer?s recovery expectations are, the lower satisfaction with the organization (Oliver 1980; Tse et al 1988).
The customer?s recovery expectations were associated with satisfaction and service performance after recovery. These appear to be key point by which relationship will affect service organization performance recovery when service failures occur.
"
Depok: Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2005
T17312
UI - Tesis Membership  Universitas Indonesia Library
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Gunawan Wibisono
"Inflammatory mediators, such as prostaglandins and histamines can cause pain. Non steroid anti-inflammatory drugs (NSAIDs) have been indicated to reduce pain on inflammatory conditions. Pharmacologically, NSAIDs inhibit prostaglandins which are synthesized from arachidonic acid by blocking cyxlooxygenase-1 and 2 enzymes. Prostaglandins are known to be overexpressed on inflammatory, premalignant and malignant conditions. The prostaglandins promote tumour development by enhancing tumour cells proliferation, tumour angiogenesis, and tumour cell metastatic opportunity, and by inducing antiapoptotic gene expression. Epidemiological and biomedically, there is significant evidence that NSAIDs could inhibit tumour development. NSAIDs inhibit expression transcription factors, angiogenic factors of tumour angiogenesus, tumour metastasis and depresse expression of antiapoptotic genes. The avidence suggest that potentially NSAIDs could prevent tumour development, besides being analgetic-antiinflammatory drugs."
[Jurnal Kedokteran Gigi Universitas Indonesia, Journal of Dentistry Indonesia], 2002
PDF
Artikel Jurnal  Universitas Indonesia Library
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Gunawan Wibisono
"Tugas bantuan Komando Kewilayahan Kodam Jaya dalam membantu Pemda untuk mengatasi bencana alam dan membantu kepolisian dalam menjaga keamanan dan ketertiban akan dapat terlaksana dengan baik bila didukung oleh prajurit Komando Kewilayah yang profesional. Kelompok acuan dilingkungan militer adalah kelompok yang berperan sebagai pengarah, panutan dan pengontrol prajurit dalam mematuhi peraturan-peraturan dan norma-nonna di lingkungan militer. Dengan peranan tersebut kelompok acuan diharapkan dapat meningkatkan profesionalisme prajurit. Tesis ini ingin mengetahui bagaimana peranan kelompok acuan meningkatkan profesionalisme prajurit Komando Kewilayahan Kodam Jaya dalam melaksanakan tugas-tugasnya.
Metode yang dipakai dalam penelitian ini adalah survai melalui pengisian kuesioner dan wawancara. Jumiah sampel yang digunakan sebanyak 100 orang yang diambil dengan cara Proportionate Stratified Random Sampling.
Penemuan penting penelitian ini adalah peranan kelompok acuan dalam meningkatkan profesionalisme prajurit Komando Kewilayahan Kodam Jaya selama ini baik, dan semakin baik peranan kelompok acuan semakin baik profesionalisme prajurit Komando Kewilayahan. Temuan ini didukung dengan hasil uji regresi yang diperoleh persamaannya Y = 38,091 + 0,510 X + e, pelaksanaan togas prajurit Komando Kewilayah Kodam Jaya selama ini baik dan profesionalisme prajurit Komando Kewilayahan Kodam Jaya dapat mendukung peningkatan ketahanan daerah Kodam Jaya.

The assistance task of Territorial Command of Military Region Command of Jakarta in providing assistance to solve the natural disaster and assisting the police in security and orderliness task may be performed appropriately if supported by the professional soldiers of the Territorial Command. The referred group in military environment is the group having a role as a director, patron and controller of the soldiers in complying with the regulations and norms of military. With that role it is expected that such group can improve the soldier professionalism. This thesis is prepared to know how is the role of the referred group in improving the professionalism of the soldiers of Territorial Command of the Military Region of Jakarta in performing their tasks.
The method applied in this research is the survey through questioner and interview. Total sample used is 100 persons taken on Proportionate Stratified Random Sampling basis.
The important discovery in this thesis is the role of the referred group in improving the professionalism of the soldiers of Territorial Command of Military Region of Jakarta all this time is good, and the better the role of the referred group, the better the professionalism of the soldiers of the Territorial Command. It is supported by the regression testing findings obtained with equation Y = 38.091 + 0.510 X + e, the implementation of the task of soldiers of Territorial Command of the Military Region of Jakarta is good all this time and their professionalism can support the improvement of the security of territory of Military Region of Jakarta.
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Program Pascasarjana Universitas Indonesia, 2005
T20262
UI - Tesis Membership  Universitas Indonesia Library
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Gunawan Wibisono
"Perumusan masalah penelitian ini adalah menelaah bagaimana hubungan relasional antara nasabah dengan perusahaan asuransi dapat mempengaruhi usaha pemulihan layanan. Penelitian mengacu pada penelitian Hess et al. (2003) yang mengembangkan suatu model dimana menjelaskan mengenai pengaruh hubungan relasional terhadap kepuasan setelah terjadi kegagalan layanan. Model ini memperlihatkan bahwa nasabah yang berkeinginan untuk memiliki hubungan yang berkelanjutan akan mengharapkan usaha pemulihan yang tinggi. Sejalan dengan expectancy-disconfirmation paradigm semakin tinggi harapan atas usaha pemulihan yang dilakukan perusahaan asuransi maka akan semakin rendah tingkat kepuasan nasabah setelah terjadi pemulihan layanan (Oliver 1980; Tse dan Wilson 1988).
Hasil penelitian memberikan implikasi manfaat bagi teori mengenai hubungan relasional, kegagalan layanan dan kepuasan nasabah setelah usaha pemulihan. Penelitian ini mengungkapkan bahwa harapan nasabah untuk mengembangkan hubungan relasional yang berkelanjutan harus diimbangi dengan usaha perusahaan atas pemulihan layanan setelah terjadi kegagalan layanan.
Key point-nya adalah bila perusahaan menginginkan hubungan yang berkelanjutan dengan nasabah, maka strategi usaha pemulihan hams disesuaikan dengan jenis kegagalan layanan yang terjadi. Kecepatan, kesigapan, memperbaiki masalah, permintaan maaf sampai kemudahan pengajuan klaim dalam satu atap menjadi hal yang diutamakan oleh nasabah.

This research investigates how customer relationship with insurance company affects customer satisfaction after recovery performance. Our conceptual model is inspired by previous research by Hess et al (2003), which proposed that customer relationship will shape expectation on recovery after service failure. Customers whom expect to have longer relationship will also be expecting greater and equal service recovery.
The empirical results showed that customer with higher expectation of relationship continuity had lower satisfaction with organization. Consistent to expectancy-disconfirmation paradigm, the higher customer's recovery expectations are the lower satisfaction with the organization (Oliver 1980; Tse et al., 1988).
The customer's recovery expectations were associated with satisfaction and service performance after recovery. These appear to be key point by which relationship will affect service organization performance recovery when service failures occur.
"
Depok: Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2005
T20284
UI - Tesis Membership  Universitas Indonesia Library
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Gunawan Wibisono
Bandung: Informatika, 2008
621.384 GUN k
Buku Teks  Universitas Indonesia Library
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Gunawan Wibisono
Bandung: Informatika, 2006
621.384 GUN w
Buku Teks  Universitas Indonesia Library
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