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2022 ◽  
Vol 184 (1) ◽  
pp. 49-82
Author(s):  
Jesús Arturo Jiménez González

In the context of signed line graphs, this article introduces a modified inflation technique to study strong Gram congruence of non-negative (integral quadratic) unit forms, and uses it to show that weak and strong Gram congruence coincide among positive unit forms of Dynkin type 𝔸n. The concept of inverse of a quiver is also introduced, and is used to obtain and analyze the Coxeter matrix of non-negative unit forms of Dynkin type 𝔸n. With these tools, connected principal unit forms of Dynkin type 𝔸n are also classified up to strong congruence.


2021 ◽  
Author(s):  
Serge Horbach ◽  
Kaare Aagaard ◽  
Jesper W. Schneider

Citing practices constitute a core element in scientific research and communication in which they serve several important functions. They both comprise the principal unit of science’s social reward system and they establish epistemic genealogy, showing the foundations on which claims are built. Distorted or problematic citing behaviour can hence have major harmful consequences for the well-functioning of the scientific enterprise. In this article we employ a case study approach to show how, even in the field of research integrity, or more broadly, meta-research, researchers commonly adhere to suboptimal citing practices. Our findings highlight, among other shortcomings, an apparent lack of critical engagement with the cited literature, leading to incorrect reproductions of claims and overgeneralisation of supposed research findings. We link such problematic citing practices to the state of crisis that science is currently claimed to face, discussing how these practices might be both a symptom and a cause of these crises.


2021 ◽  
Vol 44 (1) ◽  
pp. 185-193
Author(s):  
Nida Zahra ◽  
Muhammad Ibrahim

Abstract Grid implementation is a principal unit in electrical and electronic engineering but it depends on the domain of these projects. For example, depending on the grid and the signal processing in that fields of electronic and electrical engineering, such as more abstract mathematics in signal conversion and e-transmission theory griding, etc. Provides transmission through grid nodes. Graph theory is very useful in research fields. As topological indices, there are more actual numbers associated with chemical composition complaints connected to the chemical grid with physical and chemical properties and reactions. In this paper, we expand the work to interconnected grid and examine the first Zagreb, the second Zagreb, Randic, sum-connectivity, harmonic, geometric, and atom bond connectivity exponents of hierarchical hypercube network based on vertex-edge and edge-vertex degree.


Textile trade has occupied second place next to agriculture. Due to the increase in population growth, textile trade in today's world is growing in plenty. A power loom is one of the main advances within weaving industrialization. It employs the country's more than thirty-five million people. Trade's main objective is to know its high-productivity power. The biggest downside which a textile trade is facing is that once the thread is cut the material gets broken. This results in the production of unnecessary cloth. The designed system is meant in such a simple way that it stops the device and avoids damage. This uses Raspberry pi 3 as the primary principal unit. The proposed system uses AC to DC Rectifier, A / D Converter and raspberry pi to signify automatic yarn cut detection in a loom. Using raspberry pi, this device mainly aims to detect the yarn cut in a loom. In this paper, the use of a single controller controls four power looms. Once the yarn cuts, the fault is detected, the supply may cut off immediately and then the fault is corrected.


2018 ◽  
pp. 01-05
Author(s):  
Mr. Dharmesh Dhabliya

Centrifugation is one of the principal unit activities in the sugar business. Customarily it is utilized in the wake of thickening of the stick juice, for example at an extremely high thickness extend. The creators are of the view that a sedimentation axis will have the most appropriate. The structure highlights of centrifugals from cluster to consistent sorts have been concentrates widely, their operational boundaries have additionally been talked about with down to earth application by a few specialists. Aside from centrifugation, the mechanical partition additionally assumes a critical job for evacuating polluting influences acquire a nearly cleansed item, Screening is likewise a technique utilized in different structures in the sugar business. The speed keeps up could be around 8000 rpm in the scope of 70-75% mud dampness. The parchment transport in this kind of axis can capture suspension particles. The size scope of 1-2µm. It can have a wide scope of feed stream, which can be assessed based on a full-scale. Every one of these focuses as examined for a helpful reception of centrifugation of stick juice in the sugar business.


2015 ◽  
Vol 1 (1) ◽  
pp. 32-45
Author(s):  
Dmitry Yermolovich

The paper is based on the author’s experience of writing a Russian-English translation textbook and looks into the methodology of teaching students to translate into their non-mother tongue (language B). It is argued that a textbook delivering a course on general, rather than specialized, translation should move away from the popular format of text samples followed by glossaries and comments. Instead, the primary focus should be made on the utterance as the principal unit of translation. Utterances need to be analysed in terms of the situations which they reflect and their semantic class components (objects, events, abstracts, and relations). This approach, termed semantic-situational, can help make the learning and teaching of Language A to Language B translation more consistent and streamlined.


2013 ◽  
Vol 27 (29) ◽  
pp. 1350212 ◽  
Author(s):  
S. NAJI ◽  
A. BELHAJ ◽  
H. LABRIM ◽  
A. BENYOUSSEF ◽  
A. EL KENZ

In this paper, we study the electronic structure of monolayer materials based on a double hexagonal geometry with (1×1) and [Formula: see text] superstructures. Inspired from the two-dimensional root system of an exceptional Lie algebra called G2, this hexagonal atomic configuration involves two hexagons of unequal side length at angle 30°. The principal unit hexagonal cell contains twelve atoms instead of the usual configuration involving only six ones relying only on the (1×1) superstructure. Using ab initio calculations based on FPLO9.00-34 code, we investigate numerically the graphene and the germanene with the double hexagonal geometry. In particular, we find that the usual electronic properties and the lattice parameters of such materials are modified. More precisely, the lattice parameters are increased. It has been shown that, in the single hexagonal geometry, the grapheme and the germanene behave as a gapless semiconductor and a semi-metallic, respectively. In double hexagonal geometry however, both materials becomes metallic.


2001 ◽  
Vol 05 (02) ◽  
pp. 239-255 ◽  
Author(s):  
MICHAEL B. ARTHUR ◽  
ROBERT J. DEFILLIPPI ◽  
VALERIE J. LINDSAY

Traditional views of industry evolution focus on the company as their principal unit of analysis. We offer an alternative view that links between workers' careers and successive community, company and industry effects. We apply this view to evidence from independent film-making, and suggest a conception of the career, involving three "ways of knowing", to underlie these links. We next explore two more industry examples, the New Zealand boat building industry and the Linux operating system in the software industry, which provide further support for the alternative view proposed, as well as extending it to consider the influence of the World Wide Web. We see all three industry examples as illustrating a range of ideas in complexity theory. We propose that a career-centric view provides a useful basis for the further exploration and application of complexity theory to industrial life.


1987 ◽  
Vol 28 (1) ◽  
pp. 65-86 ◽  
Author(s):  
Phyllis M. Martin

In the nineteenth century, the entrenched power of three Cabindan families, Nsambo, Npuna and Nkata Kolombo, was challenged by the rise of the Franques. The dominant figure, Francisco Franque, amassed wealth through a close alliance with Brazilian slave traders and through freighting goods and passengers in ‘coasting’ vessels which were locally built. At the same time he invested in a large household and attracted to his village dependents who provided labour and armed support for the expansion of his territorial base. Beyond the village, Franque, like other ‘big men’ at Cabinda, depended on an alliance with kinsmen for the defence of family interests. In the last quarter of the century, the Franques were weakened by the end of the slave trade, by disputes over inheritance rights, following the death of Francisco Franque, by the challenge of Manuel José Puna and by the emigration of junior family members in search of employment in the colonial economy of Angola and neighbouring territories. After 1885, under Portuguese colonial rule, the household was no longer a principal unit of production and family cohesion was no longer relevant. European settlers and companies moved into prime land and the emigration of workers, including women, intensified in the face of deteriorating economic conditions. Some individuals continued to have access to privilege, as far as that was possible in Angolan colonial society, through education. At Cabinda, the Portuguese authorities gave at least nominal recognition to some senior family members, for example at official celebrations. The name of the old families lived on through prominent individuals although their collective power and influence had been drastically undermined.


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