A systematic literature review of blockchain-based applications: Current status, classification and open issues

１ インフラを構築する（ＡＷＳにおけるインフラ；ＶＰＣを構成する；ＶＰＣとオンプレミス環境とを接続する） ２ ファイルオブジェクトを保存・共有・公開する（オブジェクトストレージＳ３の機能；ファイルストレージとして利用する；Ｗｅｂサーバーを構築する；信頼性とコストのバランスをとりたい） ３ アプリケーションサーバーを構築する（Ａｍａｚｏｎ ＥＣ２とＡＷＳ Ｌａｍｂｄａ；スケーラビリティーを高める；サーバーレスでプログラムを動かす；データベースサービスを活用する） ４ ＡＷＳシステムを管理する（リソース監視と異常検知・通報；耐障害性を高める仕組みとバックアップ＆リカバリー；構成管理）

Amazon Web Services完全ソリューションガイド

In this paper, we design a distributed platform for anonymized dataset trading without any centralized trusted third party. The platform consists of peers and consensus-based blockchain mechanism, and each peer acts as a data broker, data receiver, or verifier for blockchain in a data transfer transaction. A data broker collects data from data owners under their consent for data trading. The Privacy Policy Manager (PPM) manages the consent information and confirms them on behalf of data owners, when data distribution is requested from data broker. We implement a prototype system of the platform using an open-source blockchain mechanism, Hyperledger Fabric, and provide evaluation results of the prototype system.

On blockchain-based anonymized dataset distribution platform

Intellectual-property (IP) rights refer to the ownership of intellectual achievement.Microfilms are getting popular nowdue to their low production cost. However, their IP rights are often violated as microfilms can be copied and transmitted via mobile devices easily.This paper proposes using blockchain (BC) to develop an IP-protection model for microfilms. Information registered at a BC cannot be changed without being notified, and this provides an ideal setting for IP protection. This paper proposes a BC-based framework for microfilms in China.

Intellectual-Property Blockchain-Based Protection Model for Microfilms

This paper proposes a new conceptual architecture for authorization of mobile services based on blockchain technologies, and presents a design of procedures for heterogeneous mobile communication services. Furthermore, an extension of the procedures is considered in order to enhance privacy protection for users. The new architecture realizes the separation of mobile communication infrastructure and billing functions and multiple use of several mobile communication services under a single contract with a billing operator.

On blockchain-based authorization architecture for beyond-5G mobile services

The goal of this work in progress is to handle transactions of social applications by using their access classes. Basically, social users access simultaneously to a small piece of data owned by a user or a few ones. For instance, a new post of a Facebook user can create the reactions of most of his/her friends, and each of such reactions is related to the same data. Thus, grouping or chaining transactions that require the same access classes may reduce significantly the response time since several transactions are executed in one shot while ensuring consistency as well as minimizing the number of access to the persistent data storage. With this insight, we propose a middleware-based transaction scheduler that uses various strategies to chain transactions based on their access classes. The key novelties lie in (1) our distributed transaction scheduling devised on top of a ring to ensure communication when chaining transactions and (2) our ability to deal with multi-partitions transactions. The scheduling phase is based on Blockchain principle, which means in our context to record all transactions requiring the same access class into a master list in order to ensure consistency and to plan efficiently their processing. We designed and simulated our approach using SimJava and preliminary results show interesting and promising results.

Blockchain-based Model for Social Transactions Processing

La fracture mandibulaire constitue un motif frequent de consultation en Odontologie a Dakar. Elle peut etre consideree comme une urgence medicale de par l’hemorragie, mais aussi par les troubles respiratoires qui peuvent en decouler. Nous nous sommes fixes comme objectif d’etudier les aspects socio-demographiques, cliniques et therapeutiques des fractures mandibulaires dans notre pratique. Materiel et methode : Il s’agit d’une etude transversale et descriptive qui s’est deroulee de fevrier 2003 a decembre 2006 et a concerne 103 patients ayant une fracture mandibulaire. Elle a eu pour cadre le service d’Odontologie de l’Hopital general de Grand Yoff. Nous avons exploite le registre des patients et les fiches individuelles d’examen des patients Resultats : L’âge moyen etait de 27,6 ans avec des extremes allant de 3 ans et 73 ans. Le sex-ratio etait de 3,9. Les delais de consultation varient de 0 a 40 jours. Le plus souvent les fractures mandibulaires sont dues a des accidents de la voie publique (46 cas, 44,70 %) et dans 57 cas (55,30 %) la fracture siege dans la region symphysaire. Le traitement consiste a faire une prescription medicamenteuse avant tout acte, avec reduction suivie d’une contention orthopedique ou chirurgicale. (Med Buccale Chir Buccale 2009 ; 15 : 137-145).

/pdf/fractures-de-la-mandibule-en-pratique-odontologique-a-propos-3v1rmflv9b.pdf

Fractures de la mandibule en pratique odontologique : à propos de 103 cas

Free space optical (FSO) communication systems provide wireless line of sight connectivity in the unlicensed spectrum, and wireless optical communication achieves higher data rates compared to their radio frequency (RF) counterparts. FSO systems are particularly attractive for last mile access problem by bridging fiber optic backbone connectivity to RF access networks. To cope with this practical deployment scenario, there has been increasing attention to the so-called dual-hop (RF/FSO) systems where RF transmission is used at a hop followed by FSO transmission to another. In this article, we study the performance of cooperative transmission systems using a mixed RF-FSO DF (decode and forward) relay using error-correcting codes including QC-LDPC codes at the relay level. The FSO link is modeled by the gamma-gamma distribution, and the RF link is modeled by the Additive White Gaussian Noise (AWGN) model. Another innovation in this article is the use of cooperative systems using a mixed FSO/RF DF relay using quasicyclic low-density parity check (QC-LDPC) codes at the relay level. We also use the space-coupled low-density parity check (SC-LDPC) codes on the same scheme to show its importance in cooperative optical transmission but also in hybrid RF/FSO transmission. The latter will be compared with QC-LDPC codes. The use of mixed RF/FSO cooperative transmission systems can improve the reliability and transmission of information in networks. The results demonstrate an improvement in the performance of the cooperative RF/FSO DF system based on QC-LDPC and SC-LDPC codes compared to RF/FSO systems without the use of codes, but also to the DF systems proposed in the existing literature.

/pdf/performance-of-hybrid-rf-fso-cooperative-systems-based-on-34wjevekjp.pdf

Performance of Hybrid RF/FSO Cooperative Systems Based on Quasicyclic LDPC Codes and Space-Coupled LDPC Codes

This paper presents the results of research on speed
regulation of a brushless DC motor. This is mainly a comparative study between a PID regulator and a fuzzy
regulator applied to the operation of this type of engine in order to find the
best control. The BLDC engine must operate under various speed and load
conditions with improved performance and robust and complex speed control.
Because of this complexity, the traditional PID command encounters difficulties
in controlling the speed of a BLDC. Another control technique is currently
developing and is producing good results. This is the fuzzy controller that
handles process control problems, that is, managing a process based on a given
set point per action on the variables that describe the process. To achieve the
desired results, the brushless DC machine model will be studied. With the model
obtained, both types of regulator will be tested. A synthesis of the observed
comparison results will enable a conclusion to be drawn on the performance of
the two types of regulators driving a BLDC (Brushless DC).

Comparative Study between the PID Regulator and the Fuzzy Regulator Applied to the Operation of a Brushless DC Motor

A challenging issue many online social media have to deal with is facing egocentric workloads that are very frequent. Such a situation is generally due to the simultaneous access of several users to a small piece of data owned by a user or a few ones. A key example is the number of comments posted on the Manchester United Facebook page after the manager announced his retirement (more than 1 billion comments on the related subjects). Since egocentric workloads are transient, two dimensions must be taken into account to deal with them: (1) the rapidity to react to the peak load and, (2) the lightness of the solution or its low cost. Therefore, the first goal of this paper is to exploit the underlying social structure of online social media to localize from which the peaks take place and to face them in their early stage. The second goal is to combine an elastic approach with a load balancing process to sustain the overall performances while minimizing the required resources. Our solution is evaluated through simulation with SimJava. The obtained results show the soundness of the approach as well as it feasibility.

Ibrahima Gueye

Papers

Blockchain-based Model for Social Transactions Processing

Fractures de la mandibule en pratique odontologique : à propos de 103 cas

Performance of Hybrid RF/FSO Cooperative Systems Based on Quasicyclic LDPC Codes and Space-Coupled LDPC Codes

Comparative Study between the PID Regulator and the Fuzzy Regulator Applied to the Operation of a Brushless DC Motor

Exploiting the Social Structure of Online Media to Face Transient Heavy Workload