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1
Content available Ośrodek Pism Drukarskich w Warszawie (1968-1979)
Tomaszewski Andrzej
Acta Poligraphica
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2020
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Vol. 15
49--67
EN
The author presented the history and the most important project achievements of the Printing Typefaces Center (OPD), which for over a decade was a part of the Research & Development Centre for the Graphic Arts (COBRPP), celebrating its anniversary this year. The facility was managed by Roman Tomaszewski, a well-known publisher and graphic arts specialists. Dozens of typefaces were designed in OPD for page layout techniques that have forever been forgotten. Despite technological changes in printing, the OPD typographic resource is today a reservoir of lettering ready for digitization and making computer fonts.
2
Content available remote Reconstructing Binary Matrices under Window Constraints from their Row and Column Sums
Alpers A., Gritzmann P.
Fundamenta Informaticae
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2017
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Vol. 155, nr 4
321--340
EN
The present paper deals with the discrete inverse problem of reconstructing binary matrices from their row and column sums under additional constraints on the number and pattern of entries in specified minors. While the classical consistency and reconstruction problems for two directions in discrete tomography can be solved in polynomial time, it turns out that these window constraints cause various unexpected complexity jumps back and forth from polynomialtime solvability to NP-hardness.
3
Content available Zastosowanie nanocząstek srebra w laserowej spektrometrii mas oraz w obrazowaniu MS : przegląd
Sekuła J., Nizioł J., Ruman T.
Wiadomości Chemiczne
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2016
|
[Z] 70, 7-8
519--539
EN
Metallic nanoparticles, especially silver nanoparticles, have attracted much attention due to their unique physical, chemical and opto-electronic properties. Silver nanoparticles have been successfully applied as a matrix replacement for the laser desorption/ionization time-of-flight mass spectrometry (LDI-ToF-MS). Silver nanoparticles (AgNPs) can efficiently absorb ultraviolet laser radiation, transfer energy to the analyte and promote analyte desorption, but also constitute a source of silver ions suitable for analyte cationisation. Nanoparticles, producing spectra with highly reduced chemical background in the low m/z region, are perfectly suited for low-molecular weight compound analysis and imaging. AgNPs have been demonstrated to allow efficient capture of different chemical compounds (including amino acids, cholesterol, fatty acids) on their surface, thus efficiently promoting their desorption and gas phase cationisation. The minimum detectable amount for those organic and biological molecules is often in the fmol range [23]. Despite the fact that scientists have developed a variety of methods for the synthesis of silver nanoparticles, there are still problems with obtaining surfaces with nanoparticles of high durability and chemical purity. Recently, a successful application of cationic silver nanoparticles (AgNPs), which were placed on MALDI targets for highly sensitive detection of d-ribose at attomolar levels as well as analysis of biological samples such as urine and blood serum [51] was shown. The application of new 109AgNPET surface has been presented with examples of analysis of nucleosides and nucleic bases [60]. One of the main directions of development of LDI-MS is the imaging mass spectrometry (MSI), enabling the visualization of surface distribution of biological samples. The critical limitations of the spatial resolution of MALDI-MSI are the size of the organic matrix crystals and the analyte migration during the matrix application process. To overcome these problems, researchers tried to use nanoparticles as substitutes of organic matrices. In 2013 Ruman group presented that direct contact of the analysed object with Ag nanoparticle-covered target permits direct surface transfer of chemical compounds. The active surface becomes then a “chemical photograph” of an object and allows MS analysis and MS imaging [68].
4
Content available remote Generalizations of Rough Set Tools Inspired by Graph Theory
Chiaselotti G., Ciucci D., Gentile T., Infusino F.
Fundamenta Informaticae
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2016
|
Vol. 148, nr 1/2
207--227
EN
We introduce and study new generalizations of some rough set tools. Namely, the extended core, the generalized discernibility function, the discernibility space and the maximum partitioner. All these concepts where firstly introduced during the application of rough set theory to graphs, here we show that they have an interesting and useful interpretation also in the general setting. Indeed, among other results, we prove that reducts can be computed in incremental polynomial time, we give some conditions in order that a partition coincides with an indiscernibility partition of a given information table and we give the conditions such that a discernibility matrix corresponds to an information table.
5
Content available The properties of collagen/chitosan porous matrices in the presence of small amount of poly(ethylene)glycol
Kozłowska J., Sionkowska A.
Engineering of Biomaterials
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2016
|
Vol. 19, no. 138 spec. iss.
46
6
Obliczanie źwarć z wykorzystaniem metody składowych symetrycznych. Cz.1 Podstawy i metamatyczne przekształcenia
Wiatr J.
Elektro Info
|
2012
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nr 9
72-78
7
Content available Radiation curing: coatings and composites
Berejka A. J., Montoney D., Cleland M. R., Loiseau L.
Nukleonika
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2010
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Vol. 55, No. 1
97-106
EN
The initial experiments conducted in the late 1960's at Radiation Dynamics, Inc. (now IBA Industrial, Inc.) showed that by removing the pigment from a radiation curable coating formulation, the same binder system could be used as a matrix system for electron beam (EB) cured fiber reinforced composites. Recently, the binder systems used for EB curable coatings have also been successfully used (without pigments) as the matrices for EB and X-ray cured fiber composites. Insights gained from the development of coatings were translated into desirable properties for matrix materials. For example, understanding the surface wetting characteristics of a coating facilitated the development of a matrix that would wet fibers; the development of coatings that would adhere to rigid substrates as metal while being bent, as for coil coatings, and which would exhibit impact resistance when cured on a metal also imparted impact resistance to cured composite materials. Thermal analyses conducted on the coating binder cured at low energies were consistent with analyses performed on thick cross-sections as used for matrices. The configuration of the final product then dictated the modality of curing, be it low-energy EB for coatings or higher energy EB or X-ray curing for composites. In industrial radiation chemistry, one deals with monomers and oligomers (similar to 102 and similar to 103 to 104 Daltons molecular weight, respectively). Thus, one can approach the development of coating binders or matrix systems as one would approach the synthesis of organic polymers. The desired final material is a fully cured and cross-linked polymer. In contrast, concepts involved in “formulating” are often derived from dealing with high molecular weight polymers (similar to 105 + Daltons) in which intense mechanical mixing is used to bring different ingredients together. When synthesizing a radiation curable coating or matrix system, greater attention is given to microphase compatibility as reflected in the microhomogeneity of the entire material.
8
Content available remote Współczesne obrabiarki erozyjne dostępne na polskim rynku
Dąbrowski L., Oczoś K. E.
Inżynieria Maszyn
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2009
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R. 14, z. 1
103-112
PL
Jednym z podstawowych dla technik wytwarzania obszarów zastosowania jest obróbka form i matryc. Do kluczowych technologii obecnie stosowanych w wytwarzaniu tego rodzaju oprzyrządowania należą: obróbka elektroerozyjna - EDM (Electrical Discharge Machining) i frezowanie z dużą prędkością skrawania - HSM (High Speed Milling). Podczas gdy EDM usuwa materiał oddziaływaniem cieplnym, to HSM skrawa materiał oddziaływaniem mechanicznym geometrycznie określonego ostrza. Już z tego prostego porównania wynikają właściwości, które formułują podstawowe przydatności sposobu do określonych zastosowań.
EN
Die and mould manufacturing is one of fundamental technological application areas. The key manufacturing methods used for such applications are: EDM (Electrical Discharge Machining) and HSM (High Speed Machining).The EDM is based on thermal interaction whereas the HSM consists in mechanical interaction of specifically shaped tool. Even this simple comparative description implies properties formulating basic usability of the methods mentioned above for specific tasks.
9
Content available remote Computer Aided Construction of Reinforced Weaves Using Matrix Calculus
Penava Ž., Sukser T., Basch D.
Fibres & Textiles in Eastern Europe
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2009
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Vol. 17, no. 5 (76)
43--48
EN
This paper describes mathematical modelling of traditional graphic structures within textile materials using binary matrices, which is made possible by the binary nature of these structures. An algorithm is presented for woven design construction (weave draft, threading draft, treadling draft and tie-up), as well as an algorithm for weave reinforcement using binary matrices. The general advantage of the algorithm is its simplicity and execution speed. Application of the weave reinforcement algorithm is also presented in this paper, and the computer program, written in C#, shows the ease of its implementation, opening the way to integration into existing and new CAD/CAM packages.
PL
W artykule opisano matematyczne modelowanie tradycyjnych struktur graficznych w materiale tekstylnym za pomocą binarnych macierzy. Jest to możliwe dzięki binarnym właściwościom struktury. Przedstawiono algorytm zaprojektowania konstrukcji tkanin uwzględniający przebieg osnowy i wątku, wątkowanie oraz przeloty, jak również algorytm pozwalający zaprojektować wzmocnienie splotów wykorzystując binarne macierze. Podstawową zaletą tych algorytmów jest ich prostota i szybkość postępowania. Przedstawiono również zastosowanie algorytmu służącego do wzmacniania splotów oraz program komputerowy napisany w języku C# uwidaczniające łatwość postępowania i ułatwiające stosowanie systemów CAD/CAM.
10
Content available remote On preserves on singularity and nonsingularity of matrices
Kalinowski J.
Demonstratio Mathematica
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2009
|
Vol. 42, nr 4
681-685
EN
Operators preserving singularity and nonsingularity of matrices were studied in paper of P. Botta under the assumption that operators are linear. In the present paper the linearity of operators is not assumed: we only assume that operators are of the form T = (fi,j), wherei,j : K -> K and K is a field, i,j is an element of {1,2,...,n}. If n > 3, then in the matrix space Mn(K] operators preserving singularity and nonsingularity of matrices must be as in paper of P. Botta. If n < 2, operators may be nonlinear. In this case the forms of the operators are presented.
11
Znakowanie wyrobów sztukowych za pomocą mikrokodów w dystrybucji towarów
Kwaśniowski S., Zając P.
Systems : journal of transdisciplinary systems science
|
2007
|
Vol. 12, nr 2
147-155
PL
Trwale znakowanie mały przedmiotów wymaga użycia tzw. mikrokodów. Najczęściej do tego celu wykorzystuje się kody matrycowe Data Matrix. Są one nanoszone na powierzchni przedmiotów o małych wymiarach różnymi technikami. Do znakowania elementów metalowych wykorzystuje się technikę mikropunktową, technikę elektrod rażenia lub techniki laserowego wytapiania, na opakowaniach kartonikowych używamy technik drukarskich, na mikroprocesorach nanoszone są za pomocą technik lakierniczych, na przedmiotach szklanych można używać trawienia, lakierowania lub drążenia ściernego. Mały kod, zawierający informacje o wyrobie wymaga do odczytu użycia czytnika wizyjnego, który potrafi odczytać (odszyfrować) informacje zawarte w kodzie. W artykule przedstawiona jest technika nanoszenia mikrokodów na przedmiotach metalowych.
EN
Durable marking of small pieces requires applying the so called micro-codes. Generally, matrix codes are used -- Data Matrix codes -- described in part I of the paper [1]. They are applied by different techniques on the surfaces of pieces with small dimensions. For marking metallic elements, the micro-point technique, technique of electro-hollowing or techniques of laser smelting are used, on board packages print techniques are used, on microprocessors micro-codes are applied by varnishing techniques, on glass pieces etching, varnishing or grinding hollowing can be used. For reading-out, the small code that includes information about the product requires a vision-type reader that is able to read (decode) information included in the code. In the paper, the technique of applying micro-codes on metallic pieces is presented.
12
Content available remote On some free groups, generated by matrices
Slanina P.
Demonstratio Mathematica
|
2004
|
Vol. 37, nr 1
55--61
13
Content available remote Analysis of the properties of some polynomial matrices by the Δ, C transformations of the certain numerical matrices
Bilonoga D.
Demonstratio Mathematica
|
2004
|
Vol. 37, nr 2
475--483
EN
The author presents a proof of the theorem on a necessary and suficient condition for the semiscalar equivalency of the polynomial matrices with the relatively prime elementary divisors in terms of the Δ, C transformations of certain way builded numerical matrices.
14
Content available remote Representation of a unital group having finite unit interval
Foulis D. J.
Demonstratio Mathematica
|
2003
|
Vol. 36, nr 4
793--805
15
Content available remote On matrices of Mazur type on rate spaces
Rao K. Ch., Singaravel T. M.
Demonstratio Mathematica
|
2002
|
Vol. 35, nr 2
339-346
16
Content available remote Podstawy mnogościowe przestrzeni wektorowej wielomianów symetrycznych wielu zmiennych w notacji spektralnej : zarys teorii
Piwowarczyk T.
Czasopismo Techniczne. Elektrotechnika
|
2000
|
R. 97, z. 4-E
61--79
EN
All symmetric polynomials of multiple variables, with the variables belonging to the fixed, final set, are the elements of the vector space of infinite dimension. The vector space contains numerous finite subspaces. These subspaces are subjected to a standard analysis. Set theory classifications and ordering relations indicate how to choose the basis. The investigation of transient matrices reveals sets of algebra identities. The unlimited set of these identities is particularly useful when it comes to engineering applications.
17
Content available remote Remarks on applications of rank functions to algebraic sets of matrices
Skrzyński M.
Demonstratio Mathematica
|
1999
|
Vol. 32, nr 2
263-271
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