Internet of things security implementation using blockchain for wireless technology

Blockchain is a new security system which group many data into a block or so called classifying the data into a block. The block can have many types and each of them content data and security code. By using a decentralize mechanism, one security code protect all the data. That could happen at the server. In this research, a network of wireless sensor technology is proposed. The transmission of sensor data is via the Internet of things (Internet of Thing) technology. As many data transmitted, they have to classified and group them into a block. All the blocks are then send to the central processing unit, like a microcontroller. The block of data is then processed, identified and encrypted before send over the internet network. At the receiver, a GUI or Apps is developed to open and view the data. The Apps or GUI have an encrypted data or security code. User must key in the password before they can view the data. The password used by the end user at the Apps or GUI must be equivalent to the one encrypted at the sensor nodes. This is to satisfy the decentralized concept used in the Blockchain. To demonstrate the Blockchain technology applied to the wireless sensor network, a MATLAB Simulink function is used. The expected results should show a number of block of data in cryptography manner and chain together. The two set of data. Both have the data encrypted using hash. The black dots indicate the data has been encrypted whereas the white dot indicate indicates the data is not encrypted. The half white and half black indicates the data is in progress of encrypted. All this data should arrange in cryptography order and chain together in a vertical line. A protocol called block and chain group the data into the block and then chain then. The data appears in the blocks and send over the network. As seen in the simulation results, the yellow color represents the user data. This data has a default amplitude as 1 or 5. The data is chained and blocked to produce the Blockchain waveform Keywords: Blockchain, Internet of things, Wireless Sensor Network and MATLAB Simulin

Education as Resistance in Literary Criticism and Journalism: Between Professionalization and Democratization of Literature

Professionalization and political engagement are usually placed as incompatible in the case of journalism and the mainstream press, resulting in an identification of cultural resistance exclusively with alternative/amateur vehicles. I will use the concept of journalistic field as introduced by Pierre Bourdieu to review these assumptions and discuss a form of political resistance that acts in one's own area of knowledge, is not overtly political and whose effects are not immediately accountable for. Drawing examples from my research on two literary newspapers published in the 1950s in Brazil and Uruguay, this paper will focus on the implications of didacticism for literary criticism as a genre of newswriting. The analysis of these newspapers will lead to a reflection on two main issues: a) the conflict between the professionalization and democratization of literature; and b) the definition of resistance as necessarily an action that is against something. The article will reconsider education in journalism as a form of resistance, taking into account its risks of becoming political indoctrination and commercial manipulation, but emphasizing its potential as a way of expanding access to literature

The Impact of Out-of-class Friends’ Interaction on Second Language Writing

The purpose of this paper is to examine the impact of friends’ interaction outside the classroom on the development and production of writing in English as a second language inside the classroom. The paper examines second language writing from the perspective of second language learning in the field of education. The terms: friends, friendship, interaction, and conversational interaction are explored as they mean in the context of this study. Then an experimental study is performed to examine the feedback the students obtain from the interaction with their friends within the same field of study and the impact of this interaction on developing the students’ writing and revision. The paper discusses how the interaction has or has not changed the writer of the paper’s view of the topic. The result of the study shows that friends’ feedback outside of the classroom plays a very important role in enhancing and developing second language writing. The group interaction helped in improving the writer’s ideas, knowledge, linguistic and academic skills which all lead to producing a better written text

A Risk Management Approach for Software Product Line Engineering

Software Product Line (SPL) Engineering is a software development paradigm that fosters systematic reuse. It is focused on improving software practices, leading companies to experience benefits, such as reduced time-to-market and effort, and higher quality for the products delivered to customers. However, establishing a SPL is neither a simple nor a cheap task, and may affect several aspects of a software company. Besides, it involves a range of risks that may hinder project success. These have to be managed accordingly, so as to minimize the likelihood of project failure. Despite the importance of Risk Management (RM) for SPL Engineering, little has been published in terms of suitable and structured practices to cope with that. This present paper reports an approach for RM in SPL Engineering, named RiPLERM (Rise Product Line Engineering – Risk Management). The approach presents activities to structure RM in SPL projects, The design of the RiPLE-RM approach elaborated on results from empirical investigations, and was proposed to facilitate the management and provide significant insights that can be used to avoid and solve risks

Solar Photocatalytic production of hydrogen from aqueous polystyrene-Pt/TiO2 Suspension

       In the present work, the Photocatalytic production of hydrogen from aqueous suspension of polystyrene is studied using titanium dioxide doped with platinum as photocatalyst. The parameters affecting the efficiency of Photocatalytic hydrogen production are Pt-loading (%), solution pH and the Pt/TiO2 loading and particle size.  Under optimum conditions, 78 micro moles of hydrogen gas is generated after about 25 hr, irradiation in deacrated solution  ( pH=13, Pt weight % load is 6% and Pt/TiO2 load and particle size are 4 gm/l and 400 mesh size respectively). Negligible amounts of hydrogen gas were noticed in the presence of unplatinized TiO2 at pH lower than 4. The apparent quantum yield of the Photocatalytic production of hydrogen was also determined and is affected by the % load of Pt on TiO2. The number average molecular weight of polystyrene decreases with irradiation time which indicates the photo degradation process under the condition employed. Carbon dioxide is also evolved at the later stage of photolysis process which suggests the partial mineralization of the polymer during the photolysis process. According to the experimental results a mechanism of hydrogen generation and polymer degradation is suggested.Â

The legacy of colonialism in Chinua Achebe's work

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.[À l'origine dans / Was originally part of : Thèses et mémoires - FAS - Département d'études anglaises

De migrante a "interno":: uma leitura sociológica do processo de desvinculação social e psíquica

Curso: Doutorado em SociologiaData da defesa: 3 de outubro de 2008Orientador: Prof. Dr. Brasilmar Ferreira Nune

O alisamento dos resultados numa empresa: o caso do Grupo SONANGOL

Dissertação de Mestrado apresentada ao Instituto de Contabilidade e Administração do Porto para a obtenção do grau de Mestre em Contabilidade e Finanças sob orientação de Professor Doutor Adalmiro Alvaro Malheiro de Castro Andrade PereiraA nossa dissertação tem como tema: “O alisamento dos resultados numa empresa.” O objetivo seguido neste estudo consiste em determinar o principal motivo e fatores que estão na base da adoção pelas empresas da prática da gestão dos resultados, baseada na falsificação dos valores proclamada no fim do ano contabilístico. A esta prática dá-se o nome de alisamento dos resultados. Para avançar com o nosso estudo, apoiamo-nos sobre as teorias de alisamento desenvolvidas pelos Eckel (1981) e Leuz (2003), bem como na abundante literatura contabilística relativa à noção de alisamento dos resultados, definida como a gestão de resultados consistente a reduzir as flutuações de um conjunto de resultados contabilísticos numa empresa. A leitura e análise de relatórios e contas anuais publicados pelo Grupo SONANGOL permitiram determinar o índice de alisamento resultado da medida do coeficiente de variações nas vendas e nos lucros, para determinar se a empresa alisa ou não os seus resultados. A teoria de Eckel (1981) e Leuz (2003) qualifica uma empresa de alisadora quando o coeficiente de oscilação e variação nos lucros é inferior ao coeficiente de oscilação de variação nas vendas. Portanto, a empresa é qualificada de não alisadora quando o coeficiente de oscilação da variação nas vendas é superior ao coeficiente de oscilação de variação nos lucros. Perante esta realidade, no caso de nosso estudo, sobre o Grupo SONANGOL, a empresa não alisa os seus resultados. As empresas do Grupo SONANGOL apresentam um resultado homogéneo cuja tendência crescente se nota desde 2003, ano consagrado à paz em Angola. Neste mesmo ano a empresa viu a sua produção aumentada, o que influencia a gestão dos seus resultados com efeitos positivos (beneficial smoothing). Não se observa contraste, retorno e risco particular em cada empresa, na medida em que todas possuem um resultado único e crescente. O relatório do grupo indica, na bolsa de Joanesburgo e da Nova Iorque, que os produtos petrolíferos do grupo SONANGOL são produzidos de forma contínua, o que fortalece a sua resiliência face aos contextos negativos que podem influenciar os seus resultados.Our dissertation hás as its theme: “The income smoothing in a company.” The purpose followed in this study is to determine the main reason and factors that underlies adoption by companies of the practice of results, based management in the forgery of the values proclaimed in end of the accounting year. And this practice is called “The income smoothing”. To accomplish our study we support theories about smoothing developed by Eckel (1981) and Leuz (2003) also in the abundances of accounting literature related to the notion of income smoothing defined as the management of consistent results to reduce the fluctuations of a set accounting results in a company. Reading and analysis of annual reports and accounts published by SONANGOL GROUP could determine the rate smoothing coefficient expressed by sales and profits to determine whether or not the company smooths their results. The theory of Eckel (1981) and Leuz (2003) qualifies a company of wiper when the coefficient of variation and fluctuation of profits is less than the coefficient of variation of oscillation sales. There fore, the company is not qualified trowel when the coefficient of variation of the oscillation of sales in greater than the coefficient of variation of oscillation of the profits. Given this reality, in the case of our study about the SONANGOL GROUP, the company does not smooth the results. The companies of SONANGOL GROUP whose results showa homogeneous, its rising trend since 2003, tear devoted to peace in Angola. That same year the company saw its production increased. What influences the management of their results with positive effects (beneficial smoothing). It is observed no contrast, return and risk for each particular company insofar that all have a unique result. The group´s report indicates that the Johannesburg and New York petroleum products SONANGOL GROUP exchange are produced continuously is making their resilience to negative contexts that may influence the results