94 research outputs found

    Properties of LDGM-LDPC codes with applications to secrecy coding

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    The ensemble of low-density generator-matrix/low-density parity-check (LDGM-LDPC) codes has been proposed in literature. In this thesis, an irregular LDGM-LDPC code is studied as a sub-code of an LDPC code with some randomly emph{punctured} output-bits. It is shown that the LDGM-LDPC codes achieve rates arbitrarily close to the channel-capacity of the binary-input symmetric-output memoryless (BISOM) channel with a finite lower-bound on the emph{complexity}. The measure of complexity is the average-degree (per information-bit) of the check-nodes for the factor-graph of the code. A lower-bound on the average degree of the check-nodes of the irregular LDGM-LDPC codes is obtained. The bound does not depend on the decoder used at the receiver. The stability condition for decoding the irregular LDGM-LDPC codes over the binary-erasure channel (BEC) under iterative-decoding with message-passing is described. The LDGM-LDPC codes are capacity achieving with bounded complexity and possess natural binning/nesting structure. These codes are applied to secrecy coding. The problem of secrecy coding for the type-II binary symmetric memoryless wiretap channel is studied. In this model, the main channel is binary-input and noiseless and the eavesdropper channel is binary-symmetric memoryless. A coding strategy based on emph{secure nested codes} is proposed. A capacity achieving length-nn code for the eavesdropper channel bins the space 0,1n{0,1}^n into co-sets which are used for secret messaging. The resulting co-set scheme achieves secrecy capacity of the type-II binary symmetric memoryless channel. As an example, the ensemble of capacity-achieving regular low-density generator-matrix/low-density parity-check (LDGM-LDPC) codes is studied as a basis for binning. The previous result is generalized to the case of a noisy main-channel. The problem of secrecy-coding for a specific type-I wiretap channel is studied. In the type-I wiretap channel under consideration, the main channel is a binary-input symmetric-output memoryless (BISOM) channel and the eavesdropper channel is a binary-symmetric channel (BSC). A secure-nested-code that achieves perfect-secrecy for the above type-I channel is proposed. The secure-nested-code is based on a nested regular LDGM-LDPC code construction.M.S.Includes bibliographical referencesby Manik RainaIncludes abstrac

    Desain Tas Limbah Kaca dengan Konsep Essentiality untuk Pemberdayaan Pengrajin Manik-Manik Kaca Jombang

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    Indonesia merupakan negara yang memiliki banyak sekali sentra kerajinan tangan yang terletak pada area pedesaan. Salah satu desa sentra kerajinan di Indonesia yang masih bertahan hingga saat ini adalah sentra kerajinan manik-manik kaca di Gudo, Jombang, Jawa Timur. Pada era 90-an, sentra kerajinan ini sangat sukses namun beberapa dekade ini mengalami penurunan pemasukan dikarenakan kurangnya inovasi serta wawasan mengenai pengembangan produknya. Untuk itu, penulis membantu mengembangkan produk-produk hasil manik-manik kaca pengrajin yang sebelumnya output produk hanya perhiasan sederhana menjadi produk yang dapat digunakan pada aktivitas sehari-hari seperti produk tas dengan menggunakan acuan konsep trend-forecasting 2020/2021 “ Essentiality”. Penulis melakukan eksplorasi material untuk mencari alternatif teknik baru yang dapat digunakan pengrajin. Lalu penulis menerapkannya pada produk baru yaitu produk tas. Selanjutnya, penulis melakukan pelatihan bersama para pengrajin guna memperkenalkan teknik eksplorasi baru dan saling bertukar pendapat bersama pengrajin, dan bersama-sama mengembangkan produk-produk menggunakan teknik baru ke arah yang lebih luas lagi. Hasil produk dari pelatihan cukup beragam antara lain produk apparel, perhiasan, home decor, bathroom set, hal ini membuktikan bahwa sebenarnya pengrajin juga dapat berinovasi secara luas. ===================================================================================================== Indonesia is a country that has many handicraft centers located in rural areas. One of the craft center villages in Indonesia that still survives today is the glass bead craft center in Gudo, Jombang, East Java. In the 90s, this craft center was very successful but in recent decades its income has decreased due to lack of innovation and increased product development. For this reason, the author helps develop products from glass bead craftsmen who were previously only jewelry jewelry that can be used in daily activities such as bags by using the concept of forecasting the 2020/2021 trend "Essentiality". The author explores the material to find alternative new techniques that can be used by craftsmen. Then the author applies it to a new product, namely bag products. Furthermore, the authors held training with the craftsmen to introduce new exploration techniques and exchange opinions with the craftsmen, as well as jointly develop products using new techniques in a broader direction. The results of the training were quite diverse, including clothing products, jewelry, home decorations, bathroom equipment, this proves that the actual maker can also be seen widely

    E-voting Indonesia: Framing the research

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    The Influences of Personal Motives on the Decision to adopt E-voting. A case of the first e-voting elections in Indonesian villages

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    The development of electronic voting (e-voting) in countries of developing democracy has focused on how to accelerate technological advancement in elections by stressing improvement in its adoptability. Investigations of the motives behind e-voting initiatives have been largely left out, leading to uninformed decisions on whether developing countries should adopt the technology. Probing into the case of e-voting initiative in Boyolali regency in Indonesia, this research aims to answer the following questions: (i) What are the motives behind the e-voting initiative in Indonesia? (ii) How do these motives influence the decision to adopt e-voting in Indonesia? and (iii) How do these motives affect the decision-making processes regarding e-voting adoption in Indonesia? Because the sensitivity to context and subjective meanings is germane, this study follows a qualitative approach to seek an in-depth understanding of decision-making behaviors and offer a new insight into the root causes that govern the behaviors. Twenty-five interviews with decision makers across different organizations and organizational levels involved in the initiative were conducted to explore the motives and explain their roles in the decision and the decision deliberation. The results highlight how the arguments of efficiency used to justify the initiative have been largely ineffectual. What is more, the adoption motives arise to be diagnostic, multiple and highly dispersed - ranging from personal obsessions toward technology to fear of losing self-existence, and from social facilitation to educating the world – that makes conflicts between motives inevitable. There is evidence to suggest the decision-to-adopt has been predominantly driven by opportunities instead of problems, coming from intense technological determinism. The decision makers have sought to satisfice, rather than optimize, and acted in accordance to their personal incentives, which are adulation, social status, personal mission, and obligation. Personal motives, thus, have stimulated boundedly rational behaviours and affected the decisions of the boundedly rational agents. Moreover, the findings also suggest that motives, in association with docility in decision deliberation, are paradoxical - to the extent that the same motives that define purposiveness of decision makers’ actions have prevented the decision makers from having a broader span of attention and from generating a more extensive set of solution alternatives. The findings show different administrators with different personal incentives have exhibited different patterns of decision process. Finally, this research has contributed to the extension of the theory of administrative behavior and the phenomenological theory of motives. Through an in-depth investigation of a contemporary phenomenon within its real-life setting, this research has proposed a new perspective to and defined new meanings of adoption motives of information systems in developing countries, i.e. motives are diagnostic and proximal that they cannot be associated simply with expectancies toward technological possibilities which are speculative and conjectural. It has also contributed to the scientific knowledge regarding the role of personal motives as antecedents of adoption decisions in public sector organizations and to the role of the personal incentives of decision makers in the adoption of decision-making processes. In a practical sense, this research has established an understanding of the socio-political constellation in the organization of e-voting adoption to guide governments in the development of policies that can support transparency and avoid transactional politics in decision making. The results has introduced a new perspective to development studies on innovation adoption strategy in the public sector and offered guidance to future implementations of e-voting in Indonesia

    PRAKTIK PERNIKAHAN DINI DENGAN CARA MERARIQ DI DESA CENDI MANIK KECAMATAN SEKOTONG KABUPATEN LOMBOK BARAT

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    Early marriage is a marriage for teenagers under the age of 20 who should not be readinya to carry out marriage, and law no. 6 of 2019 article 7 (1) marriage is only permitted if the male party has reached the age of 19 years and party has reached the age of 19 years. Article 6 (2) to marry someone eho has not reached the age of 21 years, both parents must have permission, these two regulations are the basis for the Indonesian people to marry in order to achieve a happy, eternal and eternal household. However, there are still many practices of early marriage, one of which is in Cendi Manik Village , so this thesis examines the Praactice of Early Marriage in Cendi Manik Village, Sekotong District, West Lombok Regency by using the problem formulation: how is the practice of early marriage by merariq in Cendi Manik Village District Sekotong and how the sociology of law reviews the practice of early marriage by means of merariq in Cendi Manik Village Sekotong District West Lombok Regency. This type of research is a qualitative research with a legal sociology with a legal sociologi approch. This research is a field research, collecting primary and secondary data by means of observation, direct intervieews and documentation. The author uses the theory of legal culture and functional structural theory.. The results of the study are: first, the practice of early marriage that occurred in Cendi Manik Village is known as the merariq custom and was kidnapped without any confluct between the two parties and was married according to the customary terms and conditions of marriage, one of the main factors in the occurrence of early marriage with merariq is cultural factors, as well as legal sociology, the people of Cendi Manik Village carry out early marriage as a social and cultural indication caused by life behavior and attitudes that influence each other

    Lamb waves detection in a bovine cortical tibia using scanning laser vibrometry

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    Most of the techniques for generating and detecting ultrasonic Lamb waves (e.g. angle-beam piezoelectric transducers, micro-electro mechanical systems (MEMS), comb and interdigital transducers, phased array transducers, and piezoceramic transducers) require a firm physical contact with the measured objects. For objects with highly irregular surfaces such as bones, it will be very difficult to produce a good contact. Thus, a non-contact Lamb wave measurement technique, the scanning laser vibrometry, is proposed in this paper to examine a bovine cortical tibia in vitro. The ultrasonic Lamb waves used had the center frequency of 84KHz. The waves were generated using a planar transducer which was coupled with a cone-shaped resonant vibrator. Only the fundamental modes of a(0) and s(0) were expected to occur. 2-Dimensional images of the Lamb waves traveling in the bone were recorded. The scan results represent out-of-plane vibration of the surface of the bone. Lamb wave modes were verified with further post-processing analyses. In time-domain, time-history prediction of the modes is fitted onto the original detected signal as to confirm their common rising time for each mode. A frequency-domain method, i.e. wavelet analysis, is also employed to define the traveling modes and their group velocity. The expected modes can be clearly defined at the center frequency. Additionally, what seemed to be a new mode, a,, was generated and detected at the higher frequency of the responses
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