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1 – 10 of 643Li Shouwei and Mei Qiang
This paper attempts to construct a public‐key coding system using grey generation and braid group.
Abstract
Purpose
This paper attempts to construct a public‐key coding system using grey generation and braid group.
Design/methodology/approach
The identification (ID) codes of both sides for communication are public for everyone and considered as public keys. Starting from the ID code of both sides of communication, the temporary secret key of communication can be obtained by the grey 1‐AGO algorithm first. Then the new formal common secret key can be obtained by using the element exchangeability of the braid group during the exchanging process of the temporary secret key between two sides of communication. The paper presents an exchange protocol of secret key based on grey data generation and braid group. It also constructs a cipher communication system by using Hash function based on the exchange protocol of secret key last.
Findings
The exchange protocol of secret key and the system of cipher communication which are proposed in this paper make use of the difficult problem of resolving disper se logarithm from generated code to ID code and the conjugate problem which is not ever resolved in braid group, which can ensure the security of the algorithm theoretically.
Practical implications
The main steps of the exchange protocol and cipher communication system in this paper can be achieved through a computer program. They can be used in many communication processes on the internet.
Originality/value
The paper succeeds in realising both secret key generation and exchanging protocol of communication by using grey systems theory and braid group properties.
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Surveys efforts towards co‐operation in interlending withincountries including Hungary, Italy, Nigeria, Ghana, Germany and Latvia.Discusses barriers to European interlending and a…
Abstract
Surveys efforts towards co‐operation in interlending within countries including Hungary, Italy, Nigeria, Ghana, Germany and Latvia. Discusses barriers to European interlending and a formula for the size of the European interlending market is given. Interlending protocol and advances in facsimile transmission are described. A methodology of estimating interlending costs, DOCMATCH II, is introduced.
IN this issue there is a Letter to the Editor (page 42). Its author is D. A. Barron, Chief Work Study Engineer of Marconi's Wireless Telegraph Co. Ltd., at Basildon. The letter is…
Abstract
IN this issue there is a Letter to the Editor (page 42). Its author is D. A. Barron, Chief Work Study Engineer of Marconi's Wireless Telegraph Co. Ltd., at Basildon. The letter is important from two aspects. Firstly, because it enables the writer of this column to clear up any misconceptions lingering in people's minds regarding references to Charles Bedaux in past editorials appearing in this journal.
Mohammad Amin Rahiminia, Masoud Latifi and Mojtaba Sadighi
The purpose of this paper is to introduce an innovative transversal tubular braid texture and to study the elastic behavior of its 3 D printed structure comparatively to 3 D…
Abstract
Purpose
The purpose of this paper is to introduce an innovative transversal tubular braid texture and to study the elastic behavior of its 3 D printed structure comparatively to 3 D printed longitudinal tubular braid texture (maypole) to be used as reinforcement.
Design/methodology/approach
Regarding the lack of proper machines for the production of the proposed texture, the structure of samples was produced as a tubular lattice braid texture using a 3 D printer with the fused deposition modeling method subsequent to simulation by Rhinoceros software. The produced specimens were composited by polyurethane resin. The composite samples were evaluated by the split disk mechanical test to obtain their hoop stress. The structures of the reinforced composites were theoretically analyzed by ANSYS software.
Findings
The results of the mechanical test and theoretical analysis showed that the composites reinforced with transversal tubular lattice braid have higher strength compared to the composites reinforced with longitudinal ones. This assured that the composite reinforced by transversal tubular lattice braid is reliable to be used as high-performance tube for different applications.
Originality/value
Further work is carried out to produce the innovated complex structure continuously by a specially designed machine and fibrous materials to reinforce tubular composites in an industrial continual process to be applied for high-pressure fluids flows.
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María Lidón de Miguel, Lidia García-Soriano, Camilla Mileto and Fernando Vegas López-Manzanares
The common language behind vernacular architecture only seems to be maintained in societies that preserve a traditional way of life. Changes in these societies can threaten their…
Abstract
Purpose
The common language behind vernacular architecture only seems to be maintained in societies that preserve a traditional way of life. Changes in these societies can threaten their cultural heritage, while research may be a tool for its conservation and enhancement. In this paper, the habitat of a Mossi community is therefore studied as a first stage in analysing the possibilities of its maintenance.
Design/methodology/approach
After a previous study, data collection from a stay in Baasneere (Burkina Faso) and the analysis of 32 traditional residential units were completed. The research showed some common features which, when compared against the bibliography reviewed, could be defined as characteristic of the traditional architecture of this culture.
Findings
The home for a family unit consisted in an enclosure formed by the grouping of adobe constructions around a courtyard. As the family grew so did the compound, in a relationship directly linking the scales of architecture and the levels of kinship. The main daily activities took place in the courtyards while the individual interior spaces were understood as private shelters. Other typologies such as granaries, kitchens, warehouses and sheds were also analysed.
Originality/value
Some features of Mossi architecture already described in the existing bibliography were verified in the Baasneere case studies, showing that this tradition is still preserved. With a multidisciplinary approach, the house was examined not so much from the perspective of construction, but of its cultural configuration.
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Beau Breslin and Katherine Cavanaugh
The law in a liberal state is often a violent instrument. So said Robert Cover. Among those communities to which the law has been particular cruel are Native Americans. Indeed…
Abstract
The law in a liberal state is often a violent instrument. So said Robert Cover. Among those communities to which the law has been particular cruel are Native Americans. Indeed, the traditions and practices of Native American tribes have spawned rich and fascinating narratives. Each tribe has created its own “nomos – its own normative universe” – with a distinct set of rules, expectations, and tenets. Even still, the state and federal governments have historically challenged Native American traditions and culture with various legal and judicial policies. Insofar as the state-imposed law is blunt and imprecise, certain Native American narratives are thus threatened. Over the past decade, several judicial cases have highlighted the clash between the state’s imperial authority and Native American narratives. Our chapter explores these court cases with an eye to the inevitable conflicts that emerge when law exists uneasily in a liberal state.
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WITH the approach of the European Management Conference at Torquay and the news that The Work Study Society will be holding a one‐day Conference in London on October 14th and…
Abstract
WITH the approach of the European Management Conference at Torquay and the news that The Work Study Society will be holding a one‐day Conference in London on October 14th and another in Hereford on November 25th it looks as if work study men will have plenty of opportunities of exchanging points of view this autumn.
I. The Gendarmerie: Historical Background The Gendarmerie is the senior unit of the French Armed Forces. It is, however, difficult to give a precise date to its creation. What can…
Abstract
I. The Gendarmerie: Historical Background The Gendarmerie is the senior unit of the French Armed Forces. It is, however, difficult to give a precise date to its creation. What can be asserted is that as early as the Eleventh Century special units existed under the sénéchal (seneschal), an official of the King's household who was entrusted with the administration of military justice and the command of the army. The seneschal's assistants were armed men known as sergents d'armes (sergeants at arms). In time, the office of the seneschal was replaced by that of the connétable (constable) who was originally the head groom of the King's stables, but who became the principal officer of the early French kings before rising to become commander‐in‐chief of the army in 1218. The connétable's second in command was the maréchal (marshal). Eventually, the number of marshals grew and they were empowered to administer justice among the soldiery and the camp followers in wartime, a task which fully absorbed them throughout the Hundred Years War (1337–1453). The corps of marshals was then known as the maréchaussée (marshalcy) and its members as sergeants and provosts. One of the provosts, Le Gallois de Fougières, was killed at Agincourt in 1415; his ashes were transferred to the national memorial to the Gendarmerie, which was erected at Versailles in 1946.
This study aims to explore the concept of transformational entrepreneurship (TE), which is relevant in emerging economies such as Brazil with its elevated level of unemployment…
Abstract
Purpose
This study aims to explore the concept of transformational entrepreneurship (TE), which is relevant in emerging economies such as Brazil with its elevated level of unemployment, taxes and interest rates along with elevated levels of institutional voids, and how firms are including purpose as part of their goals and strategies.
Design/methodology/approach
The study is based on a multiple case study of six Afro-entrepreneurs, participants of a consulting project from Sebrae, the Brazilian Micro and Small Business Support Service, a private entity that promotes the competitiveness and sustainable development of micro and small business enterprises (Sebrae, 2022).
Findings
This work studied the transformational power of entrepreneurship and how six beauty salons led by black women have the ability to not only generate income but also contribute to social and cultural aspects.
Practical implications
This work demonstrates how TE has the potential to improve the lives of a population that has historically been marginalized and faces the lived consequences of socioeconomic discrimination.
Originality/value
This paper provides valuable contributions through a case study of transformational, ethnic and women’s entrepreneurship, not very explored in the literature.
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