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2022 ◽  
Author(s):  
DEVANSH SINGH

Abstract In this article I have used method which tells that number of solutions of Diophantine equation: n! = P(s) is infinite if some condition is satisfied. I have applied Inverse Laplace Transform to n! = P(s) and got function f(t) which is easier to deal with. The condition is given in section below contains zero of f(t) or zero of some modified function of f(t): g(t) = f(t) - h(t).


2022 ◽  
Author(s):  
Gopinath N ◽  
Prayla Shyry D

Abstract Network security is critical for both personal and business networks. Most homes with high – speed internet have one or more wireless routers, which can be hacked if not adequately secured. Even though, if more number of solutions were addressed for security, still the security is challenging one in networks.Quantum Key Distribution was proposed to enhance security in the past literature. In this QKD, the secret message was converted in to Q-bits. Through this side channel, there is a chance to hack the data by the Eavesdropper which cannot be identified by the receiver side. So, receiver will send the acknowledgement to the sender for sending encrypted data in the classical channel.From this, the hacker can easily fetch the encrypted data from the classical channel. To address this issue, Security in Quantum side Channel (SQSC) framework has been proposed in which Shifting and Binary Conversions (SBC) algorithm has been implemented. This proposed security model attains good performance to a greater extent.


2021 ◽  
Vol 5 (12) ◽  
pp. 323
Author(s):  
Józef Iwaszko ◽  
Moosa Sajed

FSP (friction stir processing) technology is a modern grain refinement method that is setting new trends in surface engineering. This technology is used not only to modify the microstructure of the surface layer of engineering materials, but increasingly more often also to produce surface composites. The application potential of FSP technology lies in its simplicity and speed of processing and in the wide range of materials that can be used as reinforcement in the composite. There are a number of solutions enabling the effective and controlled introduction of the reinforcing phase into the plasticized matrix and the production of the composite microstructure in it. The most important of them are the groove and hole methods, as well as direct friction stir processing. This review article discusses the main and less frequently used methods of producing surface composites using friction stir processing, indicates the main advantages, disadvantages and application limitations of the individual solutions, in addition to potential difficulties in effective processing. This information can be helpful in choosing a solution for a specific application.


2021 ◽  
Vol 65 (1) ◽  
pp. 129-147

Предложен ряд решений, проливающих свет на темные и спорные места в десяти стихотворных текстах выдающегося русского и советского поэта О. Э. Мандельштама, критически проанализи- рованы существующие в современной специальной литературе трактовки таких мест. Выявлены тактики, реализующие характерную для позднего Мандельштама «установку на загадку» (О. Ронен), определены базисные функции данной установки в его поэтике. Как показал анализ, основной из таких тактик является метафора, различными способами затемненная, а потому допускающая вари- ативность трактовок либо в той или иной степени герметичная, т. е. закрытая для исчерпывающего и однозначного истолкования. Такие «темные» метафоры, основной субъект которых не поддается уверенной экспликации, поэт именовал «гераклитовыми».В статье приведены доводы в пользу того факта, что внутренняя форма термина гераклитова метафора восходит к прозванию раннеантичного греческого философа Гераклита Эфесского – σκοτεινός ‘темный’. Среди применяемых О. Э. Мандельштамом способов затемнения семантических переносов наиболее востребованными, а значит, характерными для его авторского идиостиля ока- зались: 1) недостаточность контекста, в частности незамкнутый характер метафор указанного типа; тщательно «припрятанная», т. е., как правило, не более чем однословная, аллюзийная опора на прецедентный текст, зачастую малоизвестный, а значит, недоступный для широкой читательской аудитории; 3) «замаскированное» указание на отдельный элемент (или элементы) той актуальной для поэта бытовой либо исторической конситуации, с опорой на которую может быть достигнуто адекватное понимание текста.Это означает, что трактовка, более или менее отвечающая авторскому замыслу, облигаторно предполагает применение контекстуального, конситуативного либо интертекстуального анализа построенных поэтом семантических переносов, в частности «гераклитовых метафор», анализ же семантических переносов настоятельно требует применения трансформационного анализа; соот- ветственно, удаленность исследователя от указанных лингвистических методов, прежде всего от экспериментальных, т. е. дистрибутивного и трансформационного анализа, если не лишает ясной перспективы, то существенно затрудняет дальнейшее герменевтическое осмысление творческого наследия позднего Мандельштама, т. е. тех текстов, которые были написаны им после 1920 года.Исследование показало, что неясность целого ряда таких текстов, иногда вплотную приближаю- щаяся к сфере герметизма, имеет определенное функциональное обоснование. Установка на загадку, или, в античной терминологии, «темный намек» (κάλυμμα, συγκάλυμμα), в подавляющем большин- стве случаев используется в стихотворных текстах О. Э. Мандельштама не как привычный атрибут эзопова языка (мнение Н. Струве), а в эстетических целях, т. е. как прием, который придает тексту эмоционально минорный, стилистически приподнятый, нередко профетический оттенок, характер энигмы.A number of solutions are proposed that shed light on the dark and controversial passages in ten poetic texts of the outstanding Russian and Soviet poet O. Mandelstam. The existing interpretations of such passages in modern special literature are critically analyzed. The tactics that implement the characteristic for late Man- delstam “orientation to riddle” (O. Ronen) are identified, the basic functions of this orientation in his poetics are determined. As the analysis has shown, the main of these tactics is a metaphor that is in various ways darkened, and therefore allows for variability of interpretations, or is more or less hermetic, i.e. closed to an exhaustive and unambiguous interpretation. Such “dark” metaphors, the main subject of which does not lend itself to confident explication, the poet called “heraclitic”.The paper provides arguments in favour of the fact that the internal form of the term heraclitic metaphor goes back to the nickname of the early antique Greek philosopher Heraclitus of Ephesus – σκοτεινός ‘dark’. Among the applied by O. Mandelstam methods of darkening of semantic transfers were the most popular, and therefore characteristic for his author’s idiostyle: 1) the lack of context, in particular, the non-closed nature of metaphors of type mentioned above; 2) carefully “hidden”, i.e., as a rule, no more than a one-word, allusive reliance on a precedent text, often little-known, and therefore inaccessible to a wide readership; “disguised” indication of a separate element (or elements) of the actual for the poet everyday or historical consituation, based on which an adequate understanding of the text can be achieved.This means that the interpretation that more or less corresponds to the author’s intention obligatorily involves the use of contextual, consituative, or intertextual analysis of the semantic transfers constructed by the poet, in particular, “heraclitic metaphors”, while the analysis of semantic transfers obligatorily requires the use of transformational analysis. Accordingly, the researcher’s remoteness from the above-mentioned linguistic methods, primarily from experimental, i.e., distributive and transformational analysis, if not de- prives of a clear perspective, then significantly complicates further hermeneutical understanding of the cre- ative heritage of the late Mandelstam, i.e., those texts that were written by him after 1920.The study has shown that the darkness of a number of such texts which sometimes comes close to the sphere of hermeticism has a certain functional justification. “Orientation to riddle”, or, in ancient terminol- ogy, “dark hint” (κάλυμμα, συγκάλυμμα), in the vast majority of cases is used in the poetic texts of O. Man- delstam not as a familiar attribute of the Aesop language (opinion of N. Struve) but for aesthetic purposes, i.e. as a technique that gives the text an emotionally minor, stylistically elevated, often prophetic shade, the character of Enigma.


Author(s):  
Nilanjan Datta ◽  
Avijit Dutta ◽  
Kushankur Dutta

In CRYPTO’16, Cogliati and Seurin proposed a block cipher based nonce based MAC, called Encrypted Wegman-Carter with Davies-Meyer (EWCDM), that gives 2n/3 bit MAC security in the nonce respecting setting and n/2 bit security in the nonce misuse setting, where n is the block size of the underlying block cipher. However, this construction requires two independent block cipher keys. In CRYPTO’18, Datta et al. came up with a single-keyed block cipher based nonce based MAC, called Decrypted Wegman-Carter with Davies-Meyer (DWCDM), that also provides 2n/3 bit MAC security in the nonce respecting setting and n/2 bit security in the nonce misuse setting. However, the drawback of DWCDM is that it takes only 2n/3 bit nonce. In fact, authors have shown that DWCDM cannot achieve beyond the birthday bound security with n bit nonces. In this paper, we prove that DWCDM with 3n/4 bit nonces provides MAC security up to O(23n/4) MAC queries against all nonce respecting adversaries. We also improve the MAC bound of EWCDM from 2n/3 bit to 3n/4 bit. The backbone of these two results is a refined treatment of extended mirror theory that systematically estimates the number of solutions to a system of bivariate affine equations and non-equations, which we apply on the security proofs of the constructions to achieve 3n/4 bit security.


2021 ◽  
pp. 37-46
Author(s):  
Jonathan D. Hauenstein ◽  
Samantha N. Sherman
Keyword(s):  

2021 ◽  
Vol XII (3 (36)) ◽  
pp. 45-70
Author(s):  
Stefan Tomasz Kwiatkowski

The subject of the article is the vocational stress experienced by teachers in the time of the COVID-19 coronavirus pandemic. The starting point for the considerations presented in the text was the specificity of working in the teaching profession - belonging to the group of support professions - which is the source of a number of burdens and tensions, which in the next part of the text are shown from the perspective of the stress experienced by people in general during the pandemic. Then, using the results of selected analyzes, the focus was on the professional burdens of teachers resulting from remote work, with particular emphasis on those resulting directly or indirectly from broadly understood interpersonal relations with students. In the summary of the article, a number of solutions were proposed, the introduction of which could be useful in terms of strengthening teachers’ ability to cope with stress.


Author(s):  
Nguyen Zen Nguyen ◽  

Bancassurance is one of the new distribution channels and is currently a particularly effective insurance distribution channel in the world and in Vietnam. From the general overview of bancassurance, benefits of bancassurance to insurance companies, the article assesses MIC's current situation of bancassurance distribution channel development in commercial banks in Vietnam. The bancassurance channel's sharp increase of revenue and commission showed that MIC's bancassurance distribution channel grew year by year from 2016 to 2020. Along with that, MIC has signed bancassurance cooperation agreements with 5 banking partners such as MB, VP Bank… and some other banks. However, MIC's growth rate of bancassurance distribution channel is still slow compared to other insurance enterprises. Recognizing those shortcomings, the research team has proposed a number of solutions to develop bancassurance distribution channel such as establishing a specialized bancassurance department, strengthening coordination between parties and investing in dedicated technology for bancassurance, strengthen training, developing human resources and building a mechanism to promote bancassurance distribution channel operations.


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