scholarly journals Pipes Construction Based on the Pipes' Centre Curve Shapes

2019 ◽  
Vol 11 (4) ◽  
pp. 69
Author(s):  
Kusno

Parts of pipeline need a long piece, a short segment, and various inflate-deflate models. They require as well the thickness and curvature of the pipes. The objective of this paper is to obtain some formulas for modeling the long pipe, the short tube, and various inflate-deflate pipe patches. Relating to the purposes, we use their cross-section, longitudinal section, and center curves of the pipe parts. The methods are, the using of the polar coordinates and of the real functions, to define the cross and longitudinal section of the pipe patches, respectively. Then, we calculate three orthonormal vectors that are determined by the tangent vectors of the pipe center curves and two unit vectors that are perpendicular to the tangent vectors. After that, we evaluate the formulas to model the long pipes and the short pipes, both inflate-deflate and thickness shapes. The results show that, using its center curves of the pipe, it is handy to design the long and short pipes, multiple thicknesses, various volume fluctuations of the pipes, and useful to model the inflate-deflate pipe parts.

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Edmond Iancu ◽  
Yair Mulian

Abstract Using the CGC effective theory together with the hybrid factorisation, we study forward dijet production in proton-nucleus collisions beyond leading order. In this paper, we compute the “real” next-to-leading order (NLO) corrections, i.e. the radiative corrections associated with a three-parton final state, out of which only two are being measured. To that aim, we start by revisiting our previous results for the three-parton cross-section presented in [1]. After some reshuffling of terms, we deduce new expressions for these results, which not only look considerably simpler, but are also physically more transparent. We also correct several errors in this process. The real NLO corrections to inclusive dijet production are then obtained by integrating out the kinematics of any of the three final partons. We explicitly work out the interesting limits where the unmeasured parton is either a soft gluon, or the product of a collinear splitting. We find the expected results in both limits: the B-JIMWLK evolution of the leading-order dijet cross-section in the first case (soft gluon) and, respectively, the DGLAP evolution of the initial and final states in the second case (collinear splitting). The “virtual” NLO corrections to dijet production will be presented in a subsequent publication.


2018 ◽  
Vol 768 ◽  
pp. 135-139 ◽  
Author(s):  
Xin Yi Zhao ◽  
Xiao Peng Li ◽  
Kang Zhao ◽  
Yu Fei Tang

The objectives of this study are to prepare a porous hydroxyapatite ceramic which has dentin tubule-like structure and determine its permeability. Slurry of hydroxyapatite powder, deionized water and a binder was poured into a ring which was placed on a freezing plate.The hydroxyapatite slurry was freezed in a certain rate (by controlling the temperature of the freeze plate at −15°C, −30°C and −45°C) for a certain period of time, then the freezed sample was freezing dried to remove the frozen vehicle, followed by being sintered at 1250 °C for 2 h. After that,the morphology of the cross section and longitudinal section of the sintered porous hydroxyapatite ceramic was observed by SEM and the hydraulic conductance of cross section discs of the sintered porous hydroxyapatite were determined using a self-made micro-flowing permeability tester. Results showed that the prepared hydroxyapatite ceramics having bottom-up unidirectional comblike tubule structure and the tubule diameters associated with the temperature of freezing plate.The ceramic discs prepared on the freezing plate of −45°C exhibited similarity to nature dentin tubule, with a diameter of 9.72±3.41mm and a hydraulic conductance of 0.16±0.09 ml×min-1×cm-2×cm×H2O-1.


Problemos ◽  
2010 ◽  
Vol 78 ◽  
pp. 74-82
Author(s):  
Mantautas Ruzas ◽  
Marius P. Šaulauskas

Straipsnis skirtas Arvydo Šliogerio filosofijos ontologinių nuostatų tyrimui, jame analizuojamos ir lyginamos Šliogerio ir Baudrillard’o tikrovės ontologinio statuso traktuotės. Šliogerio filosofijoje tikrovės ontologinis statusas tematizuojamas parodant ir tai, kas yra, ir tai, kas nėra tikrovė. Baudrillard’as tikrovės ontologinį statusą įvardija negatyviai tematizuodamas tik tai, kas nėra tikrovė. Šliogerio filosofija yra grindžiama paradoksalia ontologine prielaida, jog metadiskursyvinė tikrovė funkcionuoja kaip galutinis neredukuojamas referentas, kuris savo ruožtu traktuojamas kaip juslinė substancija (Esmas). Tačiau pati juslinė substancija, nors ir būdama pamatiniu principu, įgalinančiu prasmingumą, pati negali būti adekvačiai įvardyta ex definitio, nes ji iš principo esti neredukuojama į jokį prasminį darinį ir juo labiau į prasminę sistemą. Baudrillard’o filosofija grindžiama semiologiniu reduktyvizmu, t. y. prielaida, kad prasminės nuorodos į metadiskursyvinę tikrovę yra autoreferentiški simboliniai konstruktai (simuliakrai), todėl bet koks bandymas ir apčiuopti tikrovę, ir apibrėžti ją pozityviai tesukuria negatyvų efektą, t. y. spontanišką ir neišvengiamą kitų autoreferentiškų simbolinių konstruktų gamybą.Pagrindiniai žodžiai: Tikrovė, simuliakras, Baudrillard’as, Šliogeris, ontologija.Positive and Negative Thematization of Reality: Šliogeris and BaudrillardMantautas Ruzas, Marius P. Šaulauskas SummaryThe article aims to elucidate the dialectical nature of the most fundamental ontological tenets of Šliogerian philosophy while contrasting them to Baudrillard’s interpretation of the ontological status of the Real. In contrast to Šliogeris who thematizes the Real both in terms of what it is an what it is not, Baudrillard proceeds in a negative way only by showing what the Real is not. Šliogeris’ philosophy is based on a paradoxical ontological argument that the metadiscursive Real functions as the final non-reductive referent conceptualised as the ultimate perceptual substance (Isness). As an ultimate metaphysical principle, it serves as a core of experience, although it cannot be adequately described ex definitio or else somehow reduced to any meaningful counterpart of the conceptual system. Baudrillard’s philosophy, on the contrary, is based on the principle of semiological reductionism, i.e. on the premise that all meaningful links to metadiscursive reality follow the self-referential logic and therefore are merely interrelated symbolic constructions (simulacra) precluding any direct access to the Real and not only to its positive (cataphatic) articulation.Keywords: the Real, simulacrum, Baudrillard, Šliogeris, ontology.


2021 ◽  
Vol LXXVII (77) ◽  
pp. 193-209
Author(s):  
MAREK KASZEWSKI

W tekście podejmowana jest problematyka ograniczeń procesu kategoryzacji klas derywatów deminutywnych oraz symilatywnych w dobie średniopolskiej. Celem opracowania było wskazanie potencjalnych przyczyn blokowania procesów kategoryzacyjnych klas historycznych deminutywów oraz symilatywów. W zakresie metodologii i ustaleń terminologicznych wykorzystano osiągnięcia tzw. „katowickiej szkoły słowotwórstwa historycznego”. Głównym źródłem materiału leksykalnego stał się trójjęzyczny dykcjonarz M.A. Troca z 1764 roku (jego III tom, z polszczyzną jako językiem wyjściowym). Świadomość lingwistyczna autora tego słownika, przejawiająca się w sposobie organizacji wyrażeń hasłowych oraz doboru ekwiwalentów wraz z definicjami, rzuciła nowe światło na sposób identyfikowania kategorii deminutywów, symilatywów, a także formacji tautologicznych przez dawnych użytkowników języka. Okazało się, że w drugiej połowie XVIII wieku żadna z tych klas nie wykrystalizowała swoich dominant, zaś czynnikiem, który mógł podtrzymywać ten stan, była obecność w języku znacznej liczby derywatów tautologicznych względem podstawy, budowanych z udziałem wielofunkcyjnych formantów z podstawowymi sufiksalnymi spółgłoskami -k- i -c-. Diminutivity, similativity and word-formation tautology in Middle Polish (illustrated with data from M.A. Troc’s Dictionary) Summary: The text deals with the limitations of the categorization process of the classes of diminutive and similative derivatives in Middle Polish. The aim of the study was to identify the potential reasons for the blocking of the categorization processes of the historical classes of diminutives and similatives. The methodology and terminology used in the paper follows the achievements of the so-called “Katowice school of historical word-formation”. The 1764 trilingual dictionary by M.A. Troc (Volume 3, with Polish as the input language) was the main source of lexical material. Based on the analysis of the presented material, one can conclude that the linguistic awareness of the lexicographer, manifested through the organization of dictionary entries and the choice of foreign equivalents and their definitions, may shed a new light on the categorical system of historical derivatives. In lack of sufficient Polish-language contexts, the translational character of lexicographic sources lets us gain information about the semantic and stylistic value of Polish lexical units on the basis of their foreign equivalents or their foreign-language definitions provided by dictionaries. The category of diminutive names in the second half of the 18th century did not yet crystallize its dominants, and the class of similative names had a similar formal and semantic status. Both classes constituted products of sets that contained derivative units, assuming a diminishing or similative function. The factor that inhibited the process of the crystallization of the dominants in the mentioned classes was the extremely high level of word-formation tautology, which did not allow language users to identify the real functions of multifunctional formants with the basic consonants -k- and -c-.


1953 ◽  
Vol 5 ◽  
pp. 101-103 ◽  
Author(s):  
G. M. Ewing ◽  
W. R. Utz

In this note the authors find all continuous real functions defined on the real axis and such that for an integer n > 2, and for each x,


2020 ◽  
Vol 21 (11) ◽  
Author(s):  
NOOR FARIKHAH HANEDA ◽  
Mulia Furqon ◽  
Muhammad Suheri

Abstract. Haneda NF, Furqan M, Suheri M. 2020. Stem borer insects on Hopea odorata in Bogor, West Java, Indonesia. Biodiversitas 21: 5308-5316. Hopea odorata Roxb. locally known as “merawan”, is a dipterocarp species that has the potentials to be developed for plantation forestry. Nonetheless, anecdotal evidence in Bogor, West Java, Indonesia, suggested that the trees suffered serious attacks caused by stem borer insects, causing defoliation of the crown and leading to stunted growth and death. This phenomenon suggests a more systematic investigation. The objectives of this research were: (i) to identify the species of stem borer which attacked H. odorata; (ii) to investigate the types and forms of the damage of H. odorata tree due to stem borer attack; and (iii) to study the effects of stem borer attack on the tree and wood of H. odorata. The results showed that all species of stem borer insects belong to Coleoptera, namely as Xyleborus perforans (Scolytidae), Xyleborinus perexiguus (Scolytidae), Platypus parallelus (Platypodidae), Belionota prasina (Buprestidae), Curculionid beetle, and Tenebrionid beetle. The number of boring holes on a single tree was 1932 holes, of which 98.6% caused by ambrosia beetles: Xyleborus perforans (1426 holes, 73.8%), Xyleborinus perexiguus (457 holes, 23.7%), and Platypus parallelus (21 holes, 1.1%). The length of boring tunnel at cross-section ranged between 2-35 cm and at longitudinal section ranged between 4-6 cm. The number of boring holes decreased along with the increasing height of tree stem. The patterns of boring tunnel at stem cross-section were branching (X. perforans, P. parallelus); encircled (X. perforans), black stains along their wall (X. perexiguus, X. perforans, P. parallelus).


2016 ◽  
Vol 23 (2) ◽  
pp. 225-244
Author(s):  
Mateusz Kasiak

Article is focused on the problem of tabloidisation of contemporary opinion journalism. The author argues with traditional understanding of tabloid, showing as an example tabloidisation of weekly opinion. The aim of the article is to show how the tabloidisation in journalistic articles of weekly “Wprost” looks like. The phenomenom of tabloidisation is illustrated based on the analysis of articles describing Kamila Durczok. How the tabloidisation was achieved there? It is more than one way. Analyses of texts show a few methods. Both the choice of subject and the construction of text, visual structure and language of text determine the tabloidisation. Analyses show also the real functions of using tabloidisation in the weekly opinion.


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