- Type of paper
: Paper in journal
Title: DETERMINATION OF THE OFFSET IMAGE AREAS WEAR BY IMPEDANCE
MEASUREMENTS
- Authors:
- Bosner, Željko (135476)
- Korelić, Olga (75790)
- Kunst, M.
Journal: Acta Graphica
Number: 1
ISSN: 0353-4707
Volume: 3
Year: 1991
Pages: from 1 to 5
Language: hrvatski
Summary: The wear of the image areas (photosensitive layer) on
positive working offset plates was investigated by measuring the impedance.
Measurements were conducted in the frequency range between 100 and 20.000
Hz, on samples from which 0 to 80.000 copies were printed successively.
The applied method proved very sensitive, indicating early degradation of
image areas. The obtained results show dependence on frequency and number
of copies, indicating the decrease in thickness of the layer. On such base
a model of image areas wear has been proposed, which cause changes in their
physical and chemical properties.
Keywords: impedance, offset plate, wear
- Type of paper
: Paper in journal
Title: A CONTRIBUTION TO THE OFFSET PRINTING PLATES WEAR
INVESTIGATION
- Authors:
- Korelić, Olga (75790)
- Kunst, M.
Journal: Acta Graphica
Number: 3
ISSN: 0353-4707
Volume: 3
Year: 1991
Pages: from 113 to 118
Language: hrvatski
Summary: Offset printing plates are during the print exposed to
wear. The following methods were applied for their examination:
determination of photosensitive layer thickness by microscope focusing,
determination of breakdown voltage, determination of surface roughness by
profilogramme and determination of photolayer porosity by a chemical
method. Specimens of offset printing plates, from which from 0 up to 80.000
copies were printed, have been tested in this way.
The applied methods give a possibility of versatile insight in the state of
image areas during the printing.
Keywords: offset plates, photosensitive layer thickness, porosity, wear
- Type of paper
: Paper in journal
Title: THE EFFECT OF HUMIDITY ON THE FLEXURAL STIFFNESS
- Authors:
- Kropar-Vančina, Vesna (57880)
- Golubović, Adrijano (75786)
- Mikota, M.
Journal: Acta Graphica
ISSN: 0353-4707
Volume: 4
Year: 1992
Pages: from 0 to 0
Language: hrvatski
Summary: Taber method was used for determination of flexural
stiffness of some (six different) coated chromo boards for a range of
relative humidity (20%, 50% and 92%). The rank of stiffness as well as
stiffness of MD and CD were determined for all the samples. Obtained
results are important for all the steps in folding box production and for
final use of boxes. The results show the eventual possibility of leading
stiffness with changing RH.
- Type of paper
: Paper in journal
Title: LABORATORY DETERMINATION OF THE OPTIMAL PRINTING
COMBINATION OF THE PRINTING INK AND THE PAPER
- Authors:
- Kropar-Vančina, Vesna (57880)
- Golubović, Adrijano (75786)
- Mikota, M.
- Možina, K.
Journal: Acta Graphica
Number: 4
ISSN: 0353-4707
Volume: 5
Year: 1993
Pages: from 207 to 216
Language: hrvatski
Summary: Testing for the determination of the printing ink and the
paper for printing the concrete graphic product primary has to point up to
the optimal combination of the printing ink and the paper - the combination
which results in prints of wanted quality and makes problems as less as
possible during the printing process. On the contrary, there is not any
standard or any recommendation for such determination. So, this article
deals with such determination on the example of finding the optimal
printing combination between 3 ink sets for colour printing of different
producers (total 12 inks) and 5 different offset papers. The determination
is based on the laboratory printing and testing.
- Type of paper
: Paper in journal
Title: RESULTS OF CONVENTIONAL AND COMPUTER AIDED OFFSET PRINTING
- Authors:
- Bolanča, Stanislav (75764)
- Mesarić, Z.
Journal: Acta Graphica
Number: 2
ISSN: 0353-4707
Volume: 3
Year: 1991
Pages: from 77 to 84
Language: hrvatski
Summary: The proof copies produced on one conventional computerized
offset machine and on one contemporary one have been tested. The behaviour
during the starting of the machines and during the printing cycle of a
smaller edition has been observed. The changes on 50%, 75% and 100% screen
tone value fields, as well as the changes in relative printing contrast
have been observed.
The measuring results show undoubtedly that the use of electronics and
computers equals and rises the quality in printing.
Keywords: colour density, relative printing contrast
- Type of paper
: Paper in journal
Title: HYDROPHILIC ABILITY OF THE OXIDIZED ALUMINIUM AS THE
FUNCTION OF TEMPERATURE
- Authors:
- Bolanča, Zdenka (4392)
- Barišić, Nikola (75775)
- Bolanča, Stanislav (75764)
Journal: Acta Graphica
Number: 3
ISSN: 0353-4707
Volume: 3
Year: 1991
Pages: from 103 to 107
Language: hrvatski
Summary: The influence of temperature on the hydrophilic ability has
not been much investigated. By the method of measuring the contact angle,
the temperature influence on the hydrophilic ability of the oxidized
aluminium surface in contact with the n-aliphatic alcohol solution has been
investigated. The hydrophilic ability of the oxidized aluminium surface is
becoming greater with the increasing temperature and depending on the
electrolyte in which the layer was formed in the following order: oxalatic
acid, phosphoric acid, sulphuric acid and in the following order of
alcohols which were in contact with the aluminium oxide layer: methanol,
ethanol, propanol.
Keywords: aluminium, contact angle, temperature
- Type of paper
: Paper in journal
Title: SOME SURFACE ABILITIES OF THE ANODIZED ALUMINIUM IN
DEPENDENCE ON THE ANODIZING CONDITIONS
- Authors:
- Bolanča, Zdenka (4392)
- Barišić, Nikola (75775)
- Mikota, M.
Journal: Acta Graphica
Number: 4
ISSN: 0353-4707
Volume: 4
Year: 1992
Pages: from 193 to 198
Language: hrvatski
Summary: A great number of papers has been dedicated to the
investigation of the oxide layers on aluminium with great regard to the
fact that the function of the metal are often determined by the oxide
films. There is a tendency of theoretical explanation of the development
and structure of the oxide films with the possibility of the application
improvement. The researches performed in this article belong there. The
investigation results show that the electrolyte concentration, the
anodizing time and the current density have greater influence on the
hydrophilic ability of the surface of the anodic film while the electrolyte
temperature in the conditions of the experiments during anodic layer is
considerably lower.
Keywords: aluminium, anodizing conditions, hydrophilic ability
- Type of paper
: Paper in journal
Title: THE INFLUENCE OF THE CONTAINER CONSTRUCTION ON THE DYE
TRANSMISSION IN OFFSET
- Authors:
- Hočevar, Boštjan
- Vesel, Mitja
- Bolanča, Stanislav (75764)
Journal: Acta Graphica
Number: 3
ISSN: 0353-4707
Volume: 4
Year: 1992
Pages: from 153 to 158
Language: hrvatski
Summary: The distribution of the dye on the printing plate is
conducted by adjusting the control of the dye flow in the container. The
conventional containers have the steel ductor blade made from one single
piece with the ductor adjusting screws. Modern container soften have the
ductor blade consisting of many separate adjustable segments. The results
which can be obtained in printing with the reconstruction of the classic
ductor blade have been tested in this article, in order to form the in
dependentzone of the dye flow.
Keywords: container, ductor blade, zone in the container
- Type of paper
: Paper in journal
Title: IMPEDANCE INVESTIGATION AS A FUNCTION OF THE BOUNDARY
PHASE PROPERTIES
- Authors:
- Barišić, Nikola (75775)
- Bolanča, Zdenka (4392)
- Bolanča, Stanislav (75764)
Journal: Acta Graphica
Number: 1
ISSN: 0353-4707
Volume: 5
Year: 1993
Pages: from 1 to 9
Language: hrvatski
Summary: In the investigation properties of the contact area oxide
layer/electrolyte, special attention is paid to the influence of the kind,
concentration and of pH value of the electrolytes. The problem is
interesting not only from the scientific point of view but also because of
the broad application of the oxide layers on aluminium.
The system oxide layer of aluminium/boric acid solution of the various
concentrations by measuring the resistance and the capacity component of
the impedance depending on the frequency has been investigated in this
paper. The relaxation time of the dipole in dependence of pH and the boric
acid concentration has been determined.
Keywords: anodized aluminium, dielectric properties, relaxation time
- Type of paper
: Paper in journal
Title: DETERMINATION OF EFFECTIVE DOT AREAS UNDER PRACTICAL
CONDITIONS
- Authors:
- Vincelj, G.
- Agić, Darko (105122)
- Kostelac-Biffl, Rajka (100034)
Journal: Acta Graphica
Number: 3
ISSN: 0353-4707
Volume: 4
Year: 1992
Pages: from 159 to 162
Language: hrvatski
Summary: Difference between effective dot ares and the actual ones
for single halftone dots were examined by means of different n-factors. The
influence of n-factors on the effective dot areas of various halftone dots
was observed. Also the optimal n-factor was determined to satisfy all
halftone dots on the print under the ordered printing conditions.
Keywords: effective dot area, n-factor, defined printing conditions
- Type of paper
: Paper in journal
Title: CONTACT ANGLE AS A FUNCTION OF FOUNTAIN SOLUTION
CONCENTRATION
- Authors:
- Lovreček, Mladen (75806)
- Gojo, Miroslav (93595)
Journal: Acta Graphica
Number: 1
ISSN: 0353-4707
Volume: 4
Year: 1992
Pages: from 23 to 30
Language: hrvatski
Summary: Contact angle between the solid and liquid phase is a
significant criteria of wetting as a surface phenomenon. In investigations
of properties of the offset printing plates it is an indication of the
state of surface and its interaction with water dipoles and other molecules
represented in the fountain solution.
Wetting was investigated on two types of positive offset plates, with
different screen tone values and concentrations of wetting agents in
fountain solution. Obtained results are presented in anusual way, as
Q-concentration dependence. Also, the wetting coefficient (Cw), as a new
criterion has been introduced and discussed, for the reason of unambiguous
interpretation of the results.
Keywords: contact angle, offset plate, wetting, wetting coefficient
- Type of paper
: Paper in journal
Title: QUICK REVERSAL MECHANISM ON PRINTING MACHINES
- Authors:
- Marošević, Grozdan (105100)
- Tisovec, D.
Journal: Acta Graphica
Number: 4
ISSN: 0353-4707
Volume: 5
Year: 1993
Pages: from 217 to 234
Language: njemački
Summary: Quick reversal mechanisms are used for two reasons: first
they shorten reversible engine running, which is useless, and increase the
working speed of the machine, and second, with their unequal speed motions,
they are used in the cases which require greater or smaller speed in the
working cycles.
In the cinematic plans, there are five mechanisms (joint quadrangle
mechanism, sheet slowing down mechanism by unloading, driving mechanism of
the feed board endless tapes, driving mechanism of the printing press bed
"OHZ" and the coulisse mechanism).
The first three mechanism are not quite reversible while theother two ones
show complete characteristics of the quick reversibility.
Keywords: coulisse mechanism, joint quandrangle mechanism, quick reversibility
- Type of paper
: Paper in journal
Title: E-PRINT, A NEW MACHINE GENERATION FOR THE OFFSET IN COLOUR
- Authors:
- Marošević, Grozdan (105100)
- Lovreček, Mladen (75806)
Journal: Acta Graphica
Number: 4
ISSN: 0353-4707
Volume: 5
Year: 1993
Pages: from 241 to 245
Language: hrvatski
Summary: The digital technology of the offset printing has been
described. The novelty which will greatly influence the further development
of the printing machines. The machine at work with the technological
characteristics and the liquid ink which is unconventional with regard to
the past printing inks have been shown.
Keywords: digital offset printing machine, digital offset printing, technological characteristics, liquid ink, sheet printing, colour offset printing
- Type of paper
: Paper in journal
Title: LESS KNOWN FACTS ABOUT CHAINS
- Authors:
- Marošević, Grozdan (105100)
Journal: Acta Graphica
Number: 2
ISSN: 0353-4707
Volume: 5
Year: 1993
Pages: from 117 to 124
Language: hrvatski
Summary: The printers think and talk about chains very rarely. It
has been known for the long time that the chains have been produced without
any problems and in great quantities (big series) and that they work
faultless. But the chains for
offset speed masters for sheet printing are not so simply made aseg. the
bicycle chains. Such chains are precise machine elements made by the very
complicated process. The experts believe that greater attention and more
interest by the printers should be paid to the chains, particularly to the
maintaining and cleaning.
Keywords: cleaning of chains, offset machine for sheet printing, chain adjustment, chain lubrication
- Type of paper
: Paper in journal
Title: CHANGES OF THE OFFSET PLATE ROUGHNESS AS INDICATOR OF WEAR
- Authors:
- Marošević, Grozdan (105100)
- Bosner, Željko (135476)
- Korelić, Olga (75790)
Journal: Acta Graphica
Number: 1
ISSN: 0353-4707
Volume: 4
Year: 1992
Pages: from 7 to 18
Language: hrvatski
Summary: Several methods are existing in investigation of offset
printing plates during the print run, and one of the direct methods is
observing the change of roughness parameters.
To obtain samples with different number of impressions, a printing form was
made on presensitized aluminium plate APO-T,Cinkarna, Celje, with 7
full-tone image areas, that were subsequently cut off the plate. KOR
Heidelberger AG offset printing machine was used for printing up to 80.000
impressions on Vevce-Multipak paper.
Roughness was measured with electronic mechanical device with needle Hommel
Werke Tester P-4. Four sufficient samples were used with 8 profilogrammes
taken. Ra, Rz and Rmax parameters were observed, as well as number of HSC,
spacing and depths off urrows. For the reason of more detailed comparison
of weared surfaces, distribution of frequencies of the furrow spacing and
depths was made and their two-dimensional division was defined.
Changes in roughness parameters values have shown to be relevantto the wear
of the offset printing plate during the print run.
Keywords: roughness, offset plate, wear
- Type of paper
: Paper in journal
Title: DI TECHNOLOGY - NOVELITY IN OFFSET
- Authors:
- Marošević, Grozdan (105100)
Journal: Acta Graphica
Number: 1
ISSN: 0353-4707
Volume: 4
Year: 1992
Pages: from 55 to 58
Language: hrvatski
Summary: The working principle of the new technology of the
simultaneous picture generating of all four offset printing plates direct
in the printing machine GTO - DI - Heidelberg AG is presented in the
article, as well as technique of the dry offset. The gap between photocopy
in colour and the colour offset printing is filled.
Keywords: DI technology, four-colour offset printing machine GTO, DIworking principle, dry offset
- Type of paper
: Paper in journal
Title: MECHANICAL PROPERTIES OF RUBBER BLANKETS IN OFFSET
- Authors:
- Marošević, Grozdan (105100)
- Bauer, Goran (135480)
Journal: Acta Graphica
Number: 3
ISSN: 0353-4707
Volume: 3
Year: 1991
Pages: from 129 to 140
Language: hrvatski
Summary: Hardness, deformability and pressability were investigated
in 40 samples of rubber blankets, as there are little literature
references. Samples were sorted according to the technological requirements
on conventional and compressible blankets and each group additionally on
hard and semi-hard rubber blankets.
Hardness was investigated by a hand Shore A hardness meter, deformability
was measured by a hardness meter with a square shaped indentor (10x10 mm)
at different burdening.
It has been established that the hardness of a rubber blankets is in a
range between 70 and 80 HS A, that deformability is lower for hard blankets
than for semi-hard ones, while the value of pressability are the lowest for
conventional hard blankets and the highest for the compressible semi-hard
blankets.
Investigation of the interdependence of mechanical properties and thickness
of the surface rubber layer did not give some significant insight; using a
larger number of samples and some other methods, more reliable results
could be achieved.
Keywords: mechanical properties, offset printing, rubber blanket
- Type of paper
: Paper in journal
Title: ANALYSIS OF THE INTERGRAFIKA SYMPOSIUM PROCEEDINGS FROM
1970 TO 1989
- Authors:
- Marošević, Grozdan (105100)
Journal: Acta Graphica
Number: 1
ISSN: 0353-4707
Volume: 3
Year: 1991
Pages: from 13 to 20
Language: hrvatski
Summary: 294 papers in ten Symposium Proceedings were analyzed to
comprise some relevant trends of bibliometric data. The subjects of papers
were classified in 38 groups, with 16 additional indicators discussed.
Elaboration and discussion of the analysed results has shown a significant
increase in quality of the Proceedings since 1983, when Symposium was
attributed as a scientific meeting.
Keywords: bibliometry, graphic arts industry, outfit of papers, subjects of papers
- Type of paper
: Paper in journal
Title: A MODIFIED COLORIMETRIC METHOD IN GRAPHIC REPRODUCTION
- Authors:
- Knešaurek, Nina (105133)
- Grković, Dražen (83105)
- Tkalčević-Smetko, Zora (105091)
Journal: Acta Graphica
Number: 1
ISSN: 0353-4707
Volume: 4
Year: 1992
Pages: from 31 to 37
Language: hrvatski
Summary: This paper presents the testing of colour deviation in the
samples of cyan and red within one edition, with the test - slide ICP - td
6164/84 printed. Spectrophotometric measurements have included the colour
slide proof, the first, the thousandth and the two thousandth copy. The
results were calculated in the CIELAB system units. The sequence of colour
deviations is individual for cyan, as well as for red from the table.
The second series of samples has been made with DuPont test wedge in the
print run of 21.000 copies. In this case, as well, the cyan and red samples
were selected, measured by the spectrophotometric relation to the light
source D65/10. The colour deviations on the samples of cyan are small ones,
visually unperceivable. The red samples show small changes in hue. With the
increase of the print run, the value delta L* has become somewhat greater.
It comes out, from the results of the modified colorimetric method shown
graphically and in tables, that in conducting and controlling the
reproduction process during the print run, the deviation of delta h, delta
L* and delta C* values should be observed, while delta E* value does not
give an insight in these changes.
Keywords: CIELAB system, colorimetric method,, chromatic coordinates, chromatic value
- Type of paper
: Paper in journal
Title: PHASE TRANSITION AND REDOX CHANGE IN MONOLAYER FILMS OF
METHYLENE BLUE
- Authors:
- Mikac-Dadić, Višnja (100012)
- Svetličić, V.
- Lugarić, J.
Journal: Progress in Colloid and Polymer Science
Number: 93
Year: 1993
Pages: from 361 to 361
Language: engleski
Summary: Properties of electroactive organic molecules at surfaces
can be characterised by purely electrochemical methodology. The redox
potential and form of the signal in cyclic voltammetry carry the
information on the interaction of molecule with the substrate (electrode)
and between the molecules themselves for each redox state involved.
The interaction of the MB+ molecules with the surface of Hg electrode is so
strong that the redox signal if the inner monolayer is well separated from
the signal of overlaying molecules.
The oxidation in the multilayer film is fast and reversible, and occurs in
a very narrow potential range, as it does for metallic phases. The
electronic conductivity within the film is due to the formation of a
MB+/LMB charge-transfer complex.
The MB+ molecules are flat oriented in the inner monolayer and their
lateral interactions are small.
NO3- induces drastic changes in the organization of the inner monolayer.
The phase transition during the redox change in the inner monolayer is
analyzed for 2D electrocrystallization. The kinetics of the redox change
fits the model for two-dimensional progressive nucleation and growth.
Keywords: phase transition, monolayer film, methylene blue, cyclic voltammetry
- Type of paper
: Paper in journal
Title: KCd SPECTRAL FEATURES IN K+Na+Cd+Ar HIGH PRESSURE LAMP
- Authors:
- Džimbeg-Malčić, Vesna (68182)
- Beuc, Robert
- Pichler, Goran
Journal: Fizika A
Number: 3
ISSN: 1330-0008
Volume: 2
Year: 1993
Pages: from 123 to 132
Language: engleski
Summary: We present the results of spectroscopic studies of the high
pressure K-Na-Cd-Ar discharge lamp. They were compared with the results of
K-Hg-Ar discharge lamp. The interesting part of the spectrum was the region
around the second resonance potassium line at 404.4 nm and 404.7 nm. There
we observed a group of satellite bands which we attribute to the KCd
excimertransitions. In the red part of the spectrum a broad KCd diffuse
band was observed with peaks at 630 nm and 640 nm. From the comparison with
the KHg system, we ascribe these bands to the 22pi - X2 sigma+ electronic
transitions.
- Type of paper
: Paper in journal
Title: A MATHEMATICAL MODEL OF A SCREENING ELEMENT
- Authors:
- Broz, D.
- Agić, Darko (105122)
Journal: Acta Graphica
Number: 2
ISSN: 0353-4707
Volume: 6
Year: 1994
Pages: from 51 to 54
Language: hrvatski
Summary: An analytical expression for approximate determining
screening element shape is supposed. For the some simple cases the
connection between the dot area and element amplitude is determined.
Keywords: screening element model, screening element shape, dot area
- Type of paper
: Paper in journal
Title: THE FREE EDGE LENGHT OF THE SCREENING ELEMENTS OF VARIOUS
SHAPE
- Authors:
- Agić, Darko (105122)
- Broz, D.
Journal: Acta Graphica
Number: 1
ISSN: 0353-4707
Volume: 7
Year: 1995
Pages: from 51 to 54
Language: hrvatski
Summary: For the round, negative round, square and elliptical
screening element in the dependence of the free edge and coverage is given.
For elliptical element, often used in praxis, the matematical model is
presented and compared to the rhombical element. It is shown that their
dependences of the free edge and coverage do not differ much concerning the
coverage in the contact on the major axis Pa and the coverage in the
contact on the minor axis Pb the value is approximately Pa+Pb=100%.
Keywords: shape of the element, circumference, coverage, screeneng element
- Type of paper
: Paper in journal
Title: MULTISTAGE TRANSPORT PROBLEMS IN GRAPHICS ARTS WORKS
- Authors:
- Pašagić, Husein (143150)
Journal: Acta Graphica
Number: 3
ISSN: 0353-4707
Volume: 3
Year: 1991
Pages: from 109 to 112
Language: hrvatski
Summary: Whitin the business and organizational deccissions in
printing production a significant place have deccissions on organization of
the internal transport. It's optimalization leads to multistage transport
problems. In this paper the problem is discussed generally, with a
two-stage transport problem specially elaborated. A modified Charnes M
procedure is suggested for the solution of the problem, and numeric example
is given.
Keywords: internal transport, linear programing, multi-stage transport problems, printing production
- Type of paper
: Paper in journal
Title: LOGISTICS AS A CONTAINER AND MULTI-MODAL TERMINAL
DISTRIBUTION OPTIMIZATION ELEMENT
- Authors:
- Ivaković, Čedomir
- Pašagić, Husein (143150)
Journal: Bilten
ISSN: 0353-278
Year: 1992
Pages: from 68 to 73
Language: hrvatski
Summary: Logistics that has over the past decade characterized the
menagement functions in economy and traffic gives an impulse to the
introduction of new systems of communication in traffic. Distribution makes
the principal basis of logistics, which then makes the broadest term in the
transport-traffic-logistics structure. A logistic system can be regarded
from a micro and a macro aspect. The optimization of distribution in
container and multi-modal terminals refers to logistics. As an element of
optimization at terminals, logistics is regarded within the scope of the
transport system that makes the biggest constituent of logistic services.
In order to define the optimum propositions of container and multi-modal
terminals we start from traffic demand which we define by way of respective
gravitation models based upon traffic flows and their intensity as
converging on container terminals.
Keywords: logistics, optimization of distribution
- Type of paper
: Paper in journal
Title: OPTIMUM PLANNING OF TRANSPORT AND PRODUCTION CAPACITIES
- Authors:
- Pašagić, Husein (143150)
Journal: Promet
Number: 4
ISSN: 0353-5320
Volume: 4
Year: 1992
Pages: from 137 to 140
Language: hrvatski
Summary: In mass production, for instance of diary products as milk,
or sugar, or construction materials, etc., there appears the problem of
optimum planning of transport of raw materials to the places of processing,
and planning of transport of finished products to the places of demand i.g.
marketing. Moreover, some additional actual proportions of this problem -
optimum selection of locations of production capacities, and the stohastic
character of individual parameters of the problem have been pointed out.
For the resolution of the two-phase transport problem the author recommends
the modified Charnes M - procedures. The procedure has also been shown of
selection of optimum capacities in production centers from the given array
of possible production potentials. The numerical example has been worked
out and analyzed. Possible trends of future work on this problem have been
referred to.
Keywords: optimum planning at transport, two-phase transport problem
- Type of paper
: Paper in journal
Title: LOGISTICS AND OPTIMIZATION OF TRANSPORT
- Authors:
- Pašagić, Husein (143150)
- Ivaković, Čedomir
Journal: Ceste i mostovi
Number: 3
ISSN: 0411-6380
Volume: 39
Year: 1993
Pages: from 71 to 74
Language: hrvatski
Summary: Logistic as a scientific discipline in its own right finds
broad application in transport. Logistic operations can be observed from
micro and macro aspect as distribution and production logistics.
Optimization in a logistic approach to management can be materialized by
way of functional connection of production, procurement, warehousing,
transport and other segments of logistic functions. Different mathematical
models as the matrix of intensity, network planning, critical path method
and other, provide results in planning and programming of logistic
services. The application of these models has been elaboreted in good
scollection and distribution centers and container terminals.
Keywords: logistics, optimization, transport
- Type of paper
: Paper in journal
Title: A REVIEW OF MONODIMENSIONAL METHODS OF INTERPOLATION
- Authors:
- Ćosović Bajić, Slavica
- Pašagić, Husein (143150)
Journal: Acta Graphica
Number: 4
ISSN: 0353-4707
Volume: 5
Year: 1993
Pages: from 193 to 205
Language: hrvatski
Summary: Desk top publishing (DTP) image includes interpolation of
the original image with less than 400 pixels per inch on more than 4000
pixels per inch. For metric images (Which require extraordinary accuracy)
the choice of the interpolation is critical. In some cases the
extrapolation method which already exists on computer for DTP, is not
acceptable due to learn basic characteristics of interpolation methods for
practical use, which have been introduced and explained in this paper.
Monodimensional interpolation methods are presented in several versions
with examples and critical explanations, referring to their use. Also, a
review of some typical problems of twodimensional application at metric
images is given.
Keywords: interpolation, metric image, computer support of printing
- Type of paper
: Paper in journal
Title: MATHEMATICS IN COMPUTER GRAPFICS
- Authors:
- Pašagić, Husein (143150)
Journal: Acta Graphica
Number: 3
ISSN: 0353-4707
Volume: 6
Year: 1994
Pages: from 105 to 158
Language: hrvatski
Summary: Smooth curves and surfaces must be generated in many
computer graphics applications. Many real-world objects are inherently
smooth, and much of computer graphics involves modeling the real world. To
create the object, the user may sculpt the object interactively, describe
it mathematically, or give an approximate descripton to be "filled in" by
some program.
This paper introduces the general area of optimal curves and surfaces
modeling. Represented are the Bezier curves.
Keywords: computer graphics, optimal curves and surfaces modeling
- Type of paper
: Paper in journal
Title: FRICTION SLIDING FACTOR OF SOME PRINTING MATERIALS
- Authors:
- Marošević, Grozdan (105100)
- Bauer, Goran (135480)
Journal: Acta Graphica
Number: 1
ISSN: 0353-4707
Volume: 5
Year: 1993
Pages: from 11 to 21
Language: hrvatski
Summary: As there are no available data in technical literature,
measurements of steady dry sliding factor (f0) were performed, containing
36 diferent samples of paper, binding materials, and packaging materials in
sliding pairs with same samples and formica, mellow and rubber.
Measurements were performed with a tribometer - descent, after a pilot
investigation, measuring f0 of the sliding pairs, whose values are known
from literature.
Measured values were in the range of 0.12 to 0.75 for samples of different
papers, from 0.18 to 1.73 for bookbinding materials, and from 0.12 to 0.80
for packaging materials.
Keywords: fricton sliding factor, printing materials, tribometer - descent
- Type of paper
: Paper in journal
Title: THERMAL BEHAVIOUR AND CHARACTERIZATION OF SOME NOVEL
IRON(III)-o-PHTHALATES
- Authors:
- Vančina, Vesna
- Himdan, T.A.
- Bilinski, H.
- Miljak, M.
- Kos, I.
- Hanžel, Danica
- Hanžel, Darko
Journal: Thermochimica acta
Number: 246
ISSN: 0040-6031
Year: 1994
Pages: from 199 to 212
Language: engleski
Summary: Several polynuclear iron(III)-o-phthalates precipitated
from acid and alkaline solutions were characterized by chemical and
thermogravimetric analysis, and infrared, Mossbauer and magnetic
measurements. Compounds prepared in acid solutions contain the trimer unit
Fe3O and, although different in chemical composition and in thermal
decomposition behaviour, show very similar IR, Mossbauer and magnetic
characteristics. The variable temperature magnetic susceptibility
measurements of these compounds were fitted to a theoretical expression
derived from a spin Hamiltonian, taking into account two different exchange
pathways along inequivalent sides of an isosceles triangle, yielding
J12/cmČ(-1)=-35.4 and J13/cmČ(-1)=-21.1. The Mossbauer spectra of this
group of samples could be satisfactorily fitted by considering the
superposition of two quadrupole split doublets with different relative
areas. Samples prepared in highly alkaline solution show a characteristic
band in the infrared spectra at 890 cmČ(-1), assigned to the asymmetric
Fe-O-Fe stretch. Their Mossbauer spectra taken in the temperature region
77-330 K reveal superparamagnetic behaviour of small particles of clusters.
Magnetic susceptibility measurements of these polynuclear iron(III) species
show Tmax/K=10 and 25, respectively. Zero field-cooled, field-cooled and
torque measurements were used to prove their spin glass behaviour in the
low temperature region.
Keywords: iron compound, IRS, magnetic susceptibility, Mossbauer, novel, phthalate, TGA
- Type of paper
: Paper in journal
Title: THE INFLUENCE OF THE COMPOSITION OF THE LIQUID PHASE ON
SOME SURFACE CHARACTERISTICS OF THE OXIDIZED ALUMINIUM
- Authors:
- Barišić, Nikola (75775)
- Bolanča, Stanislav (75764)
- Bolanča, Zdenka (4392)
Journal: Der Polygraph
Number: 6
Year: 1993
Pages: from 42 to 46
Language: njemački
Summary: The subject of this article was the investigatin of the
interaction of melted species and diffently surface treated aluminium. The
hydrophility of aluminium increases in dependance on the process of layer
forming in the sequence: anodized aluminium > bohemitized and in dependance
on species from the liquid phase in the sequence: sulphate > phosphate >
oxalate > tartarate. The obtained results are discussed from the adsorption
aspects - desorption of the method species, concentration and pH values of
the solution process.
Keywords: anodised aluminium, condition of anodization, bohemitised aluminium, composition of the liquid phase
- Type of paper
: Paper in proceedings
Title: LABORATORY CONTROL METHOD OF THE STRENGHT OF THE BOARD
GLUTING TOGETHER
- Authors:
- Kropar-Vančina, Vesna (57880)
- Golubović, Adrijano (75786)
- Grabarić, Želimir (146614)
- Lozo, B.
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova s 12. znanstveno-stručnog simpozija Intergrafika '93
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 205 to 211
Meeting: Intergrafika '93
Held: from 03/24/93 to 03/26/93
Summary: The laboratory device has been constructed for uniform
anddefined coating of PV-acetate glues on the board samples.
SeveralPV-acetate glues from a various manufacturers and kromokartonhave
been tested, whose surfaces were non varnished or varnishedby various kinds
of varnish. The suitableness of the variouskinds of glue for gluing
variously varnished boards, the strengthof gluing, as well as the ability
to reproduce has been foundout.
Keywords: strength of gluing, PV-acetate glues
- Type of paper
: Paper in proceedings
Title: ELECTROCEMICAL GOLDING IN FLUIDIZED BED OF INERT PARTICLES
- Authors:
- Gojo, Miroslav (93595)
- Stanković, V.D.
Proceedings title: Knjiga radova, XII jugoslavenski simpozij o elektrokemiji
Language: hrvatski
Place: Sarajevo, Bosna i Hercegovina
Year: 1991
Pages: from 179 to 180
Meeting: XII jugoslavenski simpozij o elektrokemiji
Held: from 06/03/91 to 06/08/91
Summary: Usage the fluidized bed of the inert particles in the
processesof the electrochemical metal deposition show the increase of
theproductivity and better quality of the metal coatings.
The tests of electrochemical golding on eutectic Au-Si wereperformed in the
citrate electrolyte (0.694 10-2 Mdm-3 KAu(CN)2 +0.22Mdm-3 C6H14N2O7), with
the use of the glass small balls withthe diameter 0.5 - 0.63 mm, of the
constant hydrodynamicconditions and various stream densities.
The obtained golding were tested by optic SEM microscope. Thethickness of
the golding was beta metrically measured.
It is established through the characterization of the obtainedgoldings,
that the goldings obtained from the fluidizied bed havesmaller crystal
grain than the goldings obtained from the nonfluidized one. The fluidized
bed enables the increase of thestream density for five times in relation to
the process withoutthe fluidized bed, and the golding has satisfactory
quality. Thebalance of energetic s satisfy the process.
Keywords: elektrochemical deposition of gold, fluidized bed, inert particles, optical and SEM analysis
- Type of paper
: Paper in proceedings
Title: INFLUENCE OF SOME MECANICAL PRORETIES ON GROOVING QUALITY
- Authors:
- Babić, Darko (100023)
- Kropar-Vančina, Vesna (57880)
- Golubović, Adrijano (75786)
- Mikota, M.
- Lajić, B.
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova s 12. znanstveno-stručnog simpozija Intergrafika '93
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 212 to 220
Meeting: Intergrafika '93
Held: from 03/24/93 to 03/26/93
Summary: Some general properties (thickness, square mass and
absorbing)and some mechanical ones (breaking force, folding endurance
andflexural stiffness) were determined for nine coated chromo boardsof
different square mass. The boards were grooved in addition.Only stiffness,
among the tested mechanical properties,manifested influence on grooving
quality. Medium square massboard was also tested for determination of
flexural stiffness foea range of relative humidity (20%, 50% and 92%). The
influence ofrelative humidity on flexural stiffness was greater than
theinfluence on square mass (or thickness) what directs at greaterinfluence
on relative humidity on grooving.
- Type of paper
: Paper in proceedings
Title: TESTING THE POSIBILITY OF CALCULATING THE REPRODUCTION
DATA FOR COLOR REPRODUCTION OF NONEXISTING ORIGINAL
- Authors:
- Kostelac-Biffl, Rajka (100034)
- Agić, Darko (105122)
- Vincelj, G.
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 11. znanstveno-stručnog simpozija Intergrafika '91
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 71 to 74
Meeting: Intergrafika '91
Held: from 03/21/91 to 03/24/91
Summary: The aim of this article was to solve the problem of
colourreproduction without the existing original. The basic model
ofcolorimetric matching was used in prediction of nonexistingcolours, in
which Neugebauer's equations were applied byitterative approach based on
the performed research. It wasobvious that the way used for this purpose
could successfullysolve the problem.
Keywords: graphic reproduction, colorimetric measurement, Neugebauers model, effective dot area
- Type of paper
: Paper in proceedings
Title: DETERMINATION OF THE DOT AREA COVERAGE FOR THE ESTIMATION
OF DEFINED CHARACTERISTIC VALUES ON THE PRINT
- Authors:
- Agić, Darko (105122)
- Vincelj, G.
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 12 znanstveno stručnog simpozija Intergrafika '93
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 124 to 128
Meeting: Intergrafika '93
Held: from 03/24/93 to 03/26/93
Summary: Investigation comprises determination of the dot area
coverage onthe print in real printing conditions. These conditions
arenecessary to realize the characteristic printing curves, as wellas for
estimation of colorimetric printing values.
Keywords: dot area coverage, printing characteristic curve, colorimetric printing values
- Type of paper
: Paper in proceedings
Title: INVESTIGATION OF SURFACE PROPERTIES OF PRINTING PLATES AS
A FUNCTION OF REPRODUCTION
- Authors:
- Lovreček, Mladen (75806)
- Gojo, Miroslav (93595)
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 12. znanstveno-stručnog simpozija Intergrafika '93
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 145 to 152
Meeting: Intergrafika '93
Held: from 03/24/93 to 03/26/93
Summary: Contact angle between solid and liquid phase is not only a
goodindicator of wetting, but also of surface state and properties.This is
very significant in offset printing which is functioningon selective
wetting of two different types of surfaces.
Contact angle was determined on two types of positivepresensibilized offset
plates, using three differentconcentrations of the wetting agent and
variable exposition of a10 halftone wedge.
The results have shown that the electrogranulated aluminiumsurface gives
lower values of contact angles, additionallydecreased by the higher
concentration of the wetting agent. Thismeans better hidrophility during
the printing process.
Keywords: wetting, offset plates, contact angle, exposition
- Type of paper
: Paper in proceedings
Title: CODEPOSITION OF COPPER WITH INERT AND CONDUCTIVE PARTICLES
- Authors:
- Gojo, Miroslav (93595)
- Stanković, V.D.
Proceedings title: Abstracts, 42nd Meeting of ISE
Language: engleski
Place: Montroux, -
Year: 1991
Pages: from 3 to 24
Meeting: 42nd Meeting of ISE, Montroux
Held: from 08/02/91 to 08/30/91
Summary: Electroplating from suspensions as a way of producing
compositecoatings has already been described by the scientists from
bothsides of Atlantic.
The present work discusses the case of copper deposition fromsuitable bath
with inclusion of inert and conductive particles aswell as the properties
of obtained composites.
Experiments were performed in cells with the agitation andpumping of the
electrolyte suspensions. the influence of particlesize, their concentration
in the electrolyte, current density onthe degree of codeposition was
determined. The effect ofhydrodynamic conditions in the cell on the
codeposition and masstransfer enhancement was also investigated.
The quality of composite coatings surface was analysed as afunction of the
kind and concentration of the particles embeddedin the metal matrix. It
means, that the roughness, porosity,hardness and microhardness etc. were
measured and correlated withparticles density in the deposit coatings.
Beside this mechanical and electrical characteristics weredetermined and
compared with adequate properties of coatingsobtained in the absence of the
particles.
Keywords: copper, electrochemical deposition, codeposition, inert particles, roughness, hardness
- Type of paper
: Paper in proceedings
Title: ELEKTROCHEMICAL CHARACTERISTICS GOLD DEPOSITS ON EUTECTIC
GOLD - SILICON
- Authors:
- Gojo, Miroslav (93595)
Proceedings title: Knjiga radova XII jugoslavenskog simpozija o elektrokemiji
Language: hrvatski
Place: Sarajevo, Bosna i Hercegovina
Year: 1991
Pages: from 177 to 178
Meeting: XII jugoslavenski simpozij o elektrokemiji
Held: from 06/03/91 to 06/08/91
Summary: Electrochemical characteristics of galvanic gold layers
ongold-silicon eutectic were investigated by rotating discelectrode
cathodic polarization method in dependence onelectrolyte temperature,
velocity of rotating electrode andelectrolyte additives. By increase of
electrolyte temperature andvelocity of rotating electrode during cathodic
polarization thereis an increase in the resulting current that
influencesdeposition rate of gold, its structure and colour.
Keywords: gold, thalium, cathodic polarization, AES, SEM analysis
- Type of paper
: Paper in proceedings
Title: PHOTOLITOGRAPHIC PROCESS AND PLASMA ETCHING
- Authors:
- Sinovčević, R.
- Gojo, Miroslav (93595)
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 11. znanstveno-stručnog simpozija Intergrafika '91
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 75 to 78
Meeting: Intergrafika '91
Held: from 03/21/91 to 03/24/91
Summary: The great advances in photolithography have been made by
electronand X ray photolithography, that allow the generation ofsubmicron
pattern.
Plasma etching has advantages for processing submicron patterncompared to
wet chemical etching methods. Plasma etching ratevariation with pressure,
RF power and gas mixture composition arediscussed in this paper.
Keywords: plasma etching, silikon, photolitographic process
- Type of paper
: Paper in proceedings
Title: INVESTIGATION OF VIBRATIONS ON WORKING PLACES OF THE
NEWSPAPER PRINTING MACHINES
- Authors:
- Čargonja, N.
- Marošević, Grozdan (105100)
- Medja, B.
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 12.znanstveno-stručnog simpozija Intergrafika '93
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 0 to 0
Meeting: Intergrafika '93
Held: from 03/24/93 to 03/26/93
Summary: This paper describes vibrations investigation working
places atnewspaper offset printing machines HARRIS and GOS Metro atHrvatska
tiskara d.o.o. The vibrations were measured in verticalpath by the modern
electronic equipment. The results of theinvestigations are shown and
correlated with the existingstandards of the permitted limits of the
vibration acceleration.
Keywords: newspaper web offset machine, working places, vibrational acceleration, vibration in the vertical direction
- Type of paper
: Paper in proceedings
Title: KNIVE BLADES MATERIAL FOR PAPER CUTTING
- Authors:
- Marošević, Grozdan (105100)
Proceedings title: Zbornik radova XI međunarodnog savjetovanja BIAM '92
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from H37 to H44
Meeting: XI međunarodno savjetovanje BIAM '92
Summary: On the basis of static and cinematic analysis of paper
cutting,as well as tribological characteristics of the paper,exploitation
terms of knifes determined, from which haveoriginated requirements for the
selection of materials for papercutting knifes.
Usual sorts of material for knifes are mentioned. High values ofwear
coefficient were established for knifes from tool steel, aswell as high
maintenance expenses. With multiple technologicaladvantages and significant
savings, knifes with cemented carbidecutting edges are gradually pushing
out the tool steel ones.
Keywords: wear coefficient of a blade, blade material, blade of the guillotine, blade, wear
- Type of paper
: Paper in proceedings
Title: STRESS OF THE OFFSET PRINTING PLATE MATERIAL
- Authors:
- Marošević, Grozdan (105100)
- Stanović, S.
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 11.znanstveno-stručnog simpozija Intergrafika '91
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 85 to 90
Meeting: Intergrafika '91
Held: from 03/21/91 to 03/24/91
Summary: Beside the structure of the devices for mounting the
offsetprinting plate onto the basic cylinder, the stress of
material(lithographic aluminium sheets) is analysed, from its bending
toobtain the bending for fixing the plate into the scrape, thephase of
tightening the plate around the basic cylinder, whenbeside stretching
forces also the friction forces are acting,with the stress of the printing
plate during the press.
Keywords: stress, offset printing plate, plate fastening, cylinder, forme cylinder
- Type of paper
: Paper in proceedings
Title: ALUMINIUM LITHOGRAPHIC METAL PLATE AS A SEMIPRODUCT FOR
THE OFFSET PRINTING PLATE
- Authors:
- Stanović, S.
- Marošević, Grozdan (105100)
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 11.znanstveno-stručnog simpozija Intergrafika '91
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 79 to 84
Meeting: Intergrafika '91
Held: from 03/21/91 to 03/24/91
Summary: Offset plates used today in platemaking for the offset
printing techniques are predominantly monometallic aluminium plates. The
phenomena are discussed which appear during aluminium processing into the
lithographic plate in function of the required mechanical properties, to
which it is exposed.
Keywords: aluminium, lithographic metal plate, mechanical properties of aluminium, cool aluminium processing
- Type of paper
: Paper in proceedings
Title: BRIGHT COLOURS AND THEIR REPRODUCTION
- Authors:
- Knešaurek, Nina (105133)
- Tkalčević-Smetko, Zora (105091)
- Grković, Dražen (83105)
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 11.znanstveno-stručnog simpozija Intergrafika '91
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 65 to 70
Meeting: Intergrafika '91
Held: from 03/21/91 to 03/24/91
Summary: Colour is defined by help of the instrument by definite
tone,saturation and brightness. The spectrophotometric measurementsare
recommended for the graphic industry and the industries withsimilar
technical principles. The ideal colour reproduction wouldshow through
measurements that the aberration (deviation) intone, saturation and
brightness did not occur. It is difficult toperform such reproduction
because of various factors. Because allthree colour characteristics do not
have the same influence onthe quality reproduction, the correctness of the
tonereproduction has priority in comparison to the other ones.
Theaberrations of definite colours are more obvious than of otherones. It
is known that the bright colours are difficult toreproduce correctly,
specially the colour of the blue sky, thecolour of the green leaves, the
colour of the skin and neutralgrey. Because of all that the aberrations of
the colorimetriccharacteristics of such colours have been investigated.
Themeasuring results are presented in the system which is incorrection with
the visual colour evaluation.
Keywords: spectrophotometric method, bright colours, colour difference, threecromatic value, colour characteristics
- Type of paper
: Paper in proceedings
Title: ON COUPLING OF PHASE TRANSITION AND REDOX CHANGE IN
MONOLAYER FILMS ON METHYLENE BLUE
- Authors:
- Mikac-Dadić, Višnja (100012)
- Svetličić, V.
- Lugarić, J.
Proceedings title: European Colloid and Interface Society
Language: engleski
Place: Graz, Austrija
Year: 1992
Pages: from 89 to 89
Meeting: VI ECIS Conference
Held: from 09/21/92 to 09/25/92
Summary: Properties of electroactive organic molecules at surfaces
can becharacterized by purely electrochemical methodology as the
redoxpotential and form of the signal carry the information on
theinteraction of a molecule with the substrate and between themolecules
themselves for each redox state involved. Chargecorresponding to the
electrode redox reaction gives the exactmeasure of the surface
concentration of the molecules.
The role of anoions and phase transitions in the adsorbed layerof MD/LMB
has been observed using fast perturbation techniques atthe mercury
electrode. The phase transitions in the monolayer aremost conveniently
analyzed by recording the current-timetransients after the appropriate
potential step. Experimentalsignals are compared with the expected I-t
response for theformation of monolayer by two-dimensional progressive
andinstantious nucleation and growth. The growth of second layerinduces an
additional phase transition accompanied by afractional charge transfer in
the first monolayer.
Keywords: phase transition, monolayer film, methylene blue, cyclic voltammetry
- Type of paper
: Paper in proceedings
Title: SOME NEW ACHIVEMENTS IN THE SCREENING PROCESS
- Authors:
- Reper, D.
- Agić, Darko (105122)
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 13. znanstveno-stručnog simpozija Intergrafika '94.
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96276-0-5
Pages: from 25 to 28
Meeting: Intergrafika '94
Held: from 10/19/94 to 10/21/94
Summary: The prograss in the screening systams and the tendency for
the better and more quality reproduction is discussed. The classic
screening system, although the rational and irrational systems are linked
in the aim of defined standards and the possibilities of the screening
system.
Keywords: screening systems, building of the screen elements in the screening system
- Type of paper
: Paper in proceedings
Title: THE LENGHT OF THE BOUNDARY OF THE SCREENING ELEMENTS
- Authors:
- Broz, D.
- Agić, Darko (105122)
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 13. znanstveno-stručnog simpozija Intergrafika '94.
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96276-0-5
Pages: from 22 to 24
Meeting: Intergrafika '94
Held: from 10/19/94 to 10/21/94
Summary: The screening elements used in printing could have various
shapes. They have very frequent circular, quadratic and elliptical shapes.
They are expressed as the dot area and certain deviations that occur in
printing processes are in the function of the perimeter. This work
considers mathematical expressions for dot area and perimeter dependence
for some frequent screening dot shapes.
Keywords: screening element shape, the boundary lenght of the element, dot area
- Type of paper
: Paper in proceedings
Title: OPERATIONAL RESEARCH IN PRINTING TECHNOLOGY
- Authors:
- Pašagić, Husein (143150)
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 11. znanstveno-stručnog simpozija Intergrafika '91.
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 129 to 133
Meeting: Intergrafika '91
Held: from 03/20/91 to 03/22/91
Summary: Printing arts, uniting different technologies, arises an
opportunity of applying methods and proceedings of operational
investigations. Problem of the appropriate printing technology selection is
specialy discussed, as well as transportation and optimal seqence of
operations. Specifities of the mathematical model are pointed out and
possible methods in solving the problems are displayed.
Keywords: optimal technology, internal transportation
- Type of paper
: Paper in proceedings
Title: OPTIMUM RESOLUTION OF CAPACITIES OF PRODUCTION CENTERS BY
MEANS OF TWO-STAGE TRANSPORT
- Authors:
- Pašagić, Husein (143150)
- Editors
- Bakovec, V.
- Martić, Ljubomir
- Neralić, Luka
Proceedings title: Zbornik radova KOI '92.
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 249 to 258
Meeting: 2. Konferecija iz operacijskih istraživanja
Held: from 10/05/92 to 10/07/92
Summary: The paper deals with the issue of an optimum location of
production capacities of the set with an optimum plan of two-stage
transport, transport of raw materials and finished products. The basic idea
refers to the resolution of the established problem and similar problems
and rests in substitution of the original problem with a less complex one.
For this problem a series of plans is searched. This procedure is in the
process until the criterion of optimum resolution is met and the optimum
plan for the original problem is reached. The algorithm has been
illustrated by way of a concrete numerical application.
Keywords: allocation, production, transport
- Type of paper
: Paper in proceedings
Title: A DUEL STAGE TRANSPORT PROBLEM AND LOCATIONS OF POSSIBLE
PRODUCTION POTENTIALS
- Authors:
- Pašagić, Husein (143150)
- Editors
- Perić, Nedeljko
Proceedings title: KOREMA '92.
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 605 to 608
Meeting: 37. Međunarodni godišnji skup KOREMA
Held: from 04/26/92 to 04/29/92
Summary: The paper deals with the problem of discrete optimization
and location. The solution method recommended for dual stage transport
problems and the selection of production capacity locations is based on
construction and analysis of a series of optimal plans. The basic idea is
to substitute the original task with a simplified one, achieving new series
of plans as long as necessary to satisfy the optimality criterium.
Keywords: discrete optimization, location
- Type of paper
: Paper in proceedings
Title: OPTIMIZATION IN COMPUTER GRAPHICS
- Authors:
- Pašagić, Husein (143150)
- Editors
- Hunjak, T.
- Martić, Ljubomir
- Neralić, Luka
Proceedings title: Zbornik radova KOI '94.
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from 278 to 278
Meeting: 4. Konferencija iz operacijskih istraživanja
Held: from 10/04/94 to 10/06/94
Summary: Smooth curves and surfaces must be generated in many
computer graphics applications. Many real-world objects are inherently
smooth, and much of computer graphics involves modeling the real world. To
create the object, the user may sculpt the object interactively, describe
it mathematically, or give an approximate description to be "filled in" by
some program.
This paper introduces the general area of optimal curves and surfaces
modeling. Represented are the Bezier curves.
Keywords: computer graphics, optimal curves and surfaces modeling
- Type of paper
: Paper in proceedings
Title: INVESTIGATION OF MECHANICAL FEATURES OF PAPER
- Authors:
- Babić, Darko (100023)
- Lajić, B.
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 11. znanstveno-stručnog simpozija Intergrafika '91.
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 105 to 110
Meeting: Intergrafika '91
Held: from 03/20/91 to 03/22/91
Summary: A lot of graphic products particulary those with high
aesthetic characteristic have greater or amaller cracks on the folded
places, which give an ugly aesthetic impression. The research was performed
with the aim to find the method and the way to test the folding of paper
and to determine the parameters which cause the appearance of cracks while
folding the cardboard and the paper.
Keywords: folder place, crach, aestetic impression, determine the parameters
- Type of paper
: Paper in proceedings
Title: LABORATORY TESTING OF PRINTING CONDITIONS ON METALIC PAPER
- Authors:
- Šuflaj, L.
- Vančina, Vesna
- Mikota, M.
- Golubović, Adrijano (75786)
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 13. znanstveno-stručnog simpozija Intergrafika '94.
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96276-0-5
Pages: from 69 to 75
Meeting: Intergrafika '94
Held: from 10/19/94 to 10/21/94
Summary: Testing for the determination of the printing ink and the
paper for printing labels primarily has to point out to the optimal
combination of the printing ink and the paper (the combination which
results prints of wanted quality and makes as less possible problems during
the printing process) and optimal printing conditions. This article deals
with testing for determination of optimal printing conditions for
combination of Metallic paper (Chromolux Metallic) and Casco Nobel Foil
Print Inks and Chromos Offset Inks.
Keywords: Foil Print Ink, Metalic paper, Offset Ink, optimal combination of printing materials
- Type of paper
: Paper in proceedings
Title: THE EFFECT OF TIME OF CLIMATIZATION UPON STIFFNESS OF
BOARD
- Authors:
- Vančina, Vesna
- Mikota, M.
- Golubović, Adrijano (75786)
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 13. znanstveno-stručnog simpozija Intergrafika '94.
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96276-0-5
Pages: from 60 to 68
Meeting: Intergrafika '94
Held: from 10/19/94 to 10/21/94
Summary: Stiffness of the board is very important during its
production and use. The effect of time of climatization upon stiffness of
board is determined. Five different coated boards were climatizated at RH
75% for a range of time - 0, 1, 2, 24, 48 and 72 h. Taber method was used
for determination of flexural stiffness of investigated boards.
Keywords: coated board, flexural stiffness, Taber method, time of climatization
- Type of paper
: Paper in proceedings
Title: THE PROJECT OF THE TECHNOLOGICAL PROCESS OF THE FLEXIBILE
PACKING PRODUCTION
- Authors:
- Babić, Darko (100023)
- Šavar, J.
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Zbornik radova 13. znanstveno-stručnog simpozija Intergrafika '94.
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96276-0-5
Pages: from 101 to 111
Meeting: Intergrafika '94
Held: from 10/19/94 to 10/21/94
Summary: The relief printing has undergoing its revival today
because of the flexible printing which uses the polymers. Advantages and
disadvantages in print, in production of packing as well as the comparasion
of the print with the offset printing and its possibilities have been shown
in the article.
Keywords: reliet printing, flexible printing, offset printing, comparasion
- Type of paper
: Paper in proceedings
Title: MECHANISM OF ELECTROCHEMICAL GOLD DEPOSITION ON EUTECTIC
Au-Si
- Authors:
- Gojo, Miroslav (93595)
- Ciković, N.
Proceedings title: Zbornik radova sa XIV skupa kemičara Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1995
Pages: from 187 to 187
Meeting: XIV skup kemičara Hrvatske
Summary: A montage of semiconductive components on metal basements
in the electronic industry is of the great practical importance. For this
purpose the process of electrochemical deposition of gold on the backside
of silicium wafer consisting of Au-Si eutectic alloy has been developed.
The process of electrochemical deposition of gold from citrate solutions
containing thalium ions is studied on the rotaring disc electrode using
cyclic voltametry method of polarization.
Keywords: mechanism of electrochemical gold deposition, rotaring electrode, cyclic voltametry, electrocatalyst
Other: XIV skup kemičara Hrvatske održan je u veljači 1995. godine.
- Type of paper
: Paper in proceedings
Title: ELECTROCHEMICAL DEPOSITS OF GOLD IN TRANSISTOR ASSEMBLING
PROCESS
- Authors:
- Gojo, Miroslav (93595)
- Ciković, N.
Proceedings title: Zbornik radova znanstvenog simpozija MIPRO '95.
Language: hrvatski
Place: Rijeka
Year: 1995
Meeting: MIPRO '95.
Summary: A montage of semiconductive components on metal basements
in the electronic industry is of the great practical importance. For this
purpose the process of electrochemical deposition of gold on the backside
of silicium wafer consisting of Au-Si eutectic alloy has been developed.
The process of electrochemical deposition of gold from citrate solutions
containing thalium ions is studied on the rotaring disc electrode using
cyclic voltametry method of polarization.
Structure and morphology of gold coatings are determined by AES and SEM
methods of analysis.
Gold deposits were observed to be of bright yellow-gold colour and of
small-size grain. In the presence of Tl+ ion was possible to achieve higher
current density of gold deposition, but the current rise had no
consequences to the grain size.
The chemical composition of Au-Si eutectic alloy had no greater influence
on the lectrochemical process thus the electrochemical deposition of gold
was equal to that one on the pure gold background.
Keywords: electrochemical deposition of gold, semiconductive component, SEM and AES analysis, electrocatalyst Tl+
Other: MIPRO '95. održan je u svibnju 1995. godine.
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Marošević, Grozdan (105100)
Proceedings title: Zbornik radova 12. međunarodnog savjetovanja BIAM '94
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from H4 to H11
Meeting: BIAM '94
- Type of paper
: Summary in proceedings
Title: THE ELECTROCHEMICAL GOLD DEPOSITION ON Au - Si ALLOYS
- Authors:
- Gojo, Miroslav (93595)
Proceedings title: Sinopsisi, XII sastanak kemičara Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 251 to 251
Meeting: XII sastanak kemičara Hrvatske
Held: from 02/11/91 to 02/13/91
Summary: The gold deposition from the citrate electrolyte with and
withoutaddition of catalyst on Au-Si alloys was investigated by themethod
of cathode polarized rotating electrode.
The alloys were obtained by steaming and alloying of gold on
themonocrystals of the Si plates. Even a small quantity of catalystinto the
electrolyte moves the potential of the gold depositiontowards more positive
values.
The composition and the structure of the Au-Si alloys haveconsiderable
influence on the process of the gold deposition. Thecomposition and the
structure of the alloys as well as theobtained gold deposit were studied by
the AES and SEM analysis.
The obtained electrochemical gold coatings on the Su - Si alloyssatisfy the
determined conditions for the installation of thesilicion transistors on
the metal bases.
Keywords: electrochemical deposition of gold, eutectic Au - Si, cathode polarization, AES, SEM analysis
- Type of paper
: Summary in proceedings
Title: PROPERTIES OF THE WATER LAYERS ADSORBED ON SOME PRINTING
SURFACES
- Authors:
- Mikac-Dadić, Višnja (100012)
- Vančina, Vesna
- Editors
- Lovreček, Mladen (75806)
Proceedings title: Intergrafika '94.
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96276-0-5
Pages: from 59 to 59
Meeting: Intergrafika '94
Held: from 10/19/94 to 10/21/94
Summary: We invesigated physical properties of some printing
surfaces as a function of the water layers adsorbed on these surfaces.
Measured quantities are stiffness and adhesion/cohesion forces on solid
printing surfaces such as board. We obseved significant dependence of these
quantities on the amount of adsorbed water. This dependence is different
for longitudinal (MD) and for perpendicular (CD) orientation of fibres in
the board. The results are indicating the rinite range in the amount of
adsorbed water which is characterised by optimal physical properties of
printing surfaces necessery for further processing in graphical production.
We suggest possible mechanism for the water adsorption on printing surfaces
dependent on relative humidity of environement and on the orientation of
fibres
Keywords: adhesion, adsorbed water (layers), cohesion, fibres orientation, printing surfaces, relative humidity, stiffness
- Type of paper
: Ph.D.
Title: THE INVESTIGATION OF ERGONOMIC CRITERIA CONDITIONS OF THE
WORKERS IN PRINTING INDUSTRY
Faculty: Fakultet strojarstva i brodogradnje Sveučilište u Zagrebu
Author: BABIĆ DARKO
Date of defense: 03/17/92
Language: hrvatski
Number of pages: 98
Summary: The application of the ergonomic principles is slowly
andgradually used in industrial plants and projecting offices andthat is
the direct contribution to better relation among a man, amachine and the
environment. But nowhere in literature allrelations are described or
studied, especially not those in theprinting industry, There are no
evidence in literature aboutvalues of intraabdominal pressure of workers at
different workingpostures in graphic industry. That is why we have tried
tobroaden the analisys and to accompany it with contemporarymethods in
which the biomechanical ergonomic analisys isspecially emphasized.
Our investigation of the workers movements coverantropomeasurements by
using the method for the determination amen's contour. The method has been
based on the relations of theharmonious circle and the criterion of eight
height of a head.
The typical movements and position of the workers on a chosenworking
places, during the work have been observed. That enabledus to estimate the
difficulty of the work on these workingplaces.
Based on these measurements and using the data about theconstruction of the
machines, on which the observed workers haveworked, the discussion about
the ergonomic position of theinvestigated systems has been performed.
The decisions refer to the levels: theoretic analysis,
additiolalanthrophomeasurements and the definition of the
biomechanicalmodel of a man in connection with the difficulties of the work
onthe observed working places and in consideration ofintraabdominal
pressure.
- Type of paper
: Ph.D.
Title: OPTIMISATION OF COLOUR REPRODUCIBILITY DIFFERENCES
Faculty: Fakultet kemijskog inženjerstva i tehnologije Sveučilište u Zagrebu
Author: KNEŠAUREK NINA
Language: hrvatski
Summary: Under the defined conditions, 24 samples which have been
considered to be similar to the chosen standards, according to their
chromatic characteristics, have been chosen by the visual method among 126
similar samples. The standard and all the tested (investigated) samples
have been measured on the spectral photometer. The measured reflenctancies
are calculated into numerical values of CIELAB. Based on the data obtained
by the instrumental method, the developed differences of 24 visualy similar
samples have been calculated and analysed. The limits of the visual
judgement expressed as (delta)L, (delta)Hab*, (delta)Cab*, have been
numerically defined. By analysing the calculated chromatic values of CIELAB
and their chromatic influence in the visual estimation of the change of the
expression of (delta)Eab* has be sugested, which all the developed colour
differences define by one numerical data, by the expression (delta)L,
(delta)Hab*, (delta)Cab*, which define the colour by three numerical
values. In this way, the values, which are the cause of the developed
differecies have been defined. The change of the hue has the greatest
influence on the visual estimation. From the set of the quated expression
in literature, the two ones have been chosen , which express the developed
differencies numerically and visually more precise than the others. The
visula estimation, instrumental measuring and choise of the expression for
calculating the range of differencies of the chromatic values of the sample
and the standard and the definition of the acceptable tolerances can be
applied in each process where the colour reproducibility is reqired.
Keywords: CIELAB colour space, colorimetry, colour tolerance, hue
- Type of paper
: Ph.D.
Title: STUDY OF ELECTROCHEMICAL GOLD DEPOSITION ON Au-Si EUTECTIC
Faculty: Fakulteta za naravoslovje in tehnologijo Univerza v Ljubljani
Author: GOJO MIROSLAV
Date of defense: 07/10/95
Language: hrvatski
Number of pages: 89
Summary: A montage of semiconductive components on metal basements
in the electronic industry is of the great practical importance. For this
purpose the process of electrochemical deposition of gold on the backside
of silicium wafer consisting of Au-Si eutectic alloy has been developed.
The process of electrochemical deposition of gold from citrate solutions
containing thalium ions is studied on the rotaring disc electrode using
cyclic voltametry method of polarization.
Structure and morphology of gold coatings are determined by AES and SEM
methods of analysis as well as the measurements of reflectancy. The results
obtained by the cyclic voltametry method have shown that limiting current
densities were not achieved in citrate solutions. The rotation speed od the
electrode had no a significant influence on the gold deposition process.
The mechanism of gold deposition was predominantly dependent on the
electrolyte composition. In the citrate solution free from thalium the
adsorption of Au(CN)- and CN- on the electrode surfaces was presumed
resulting in the formation of Au(CN)ad species which afterwards reduced to
Au0. In the citrate solution containing thalium ad adsorption of Tl+ ion on
the surface was presumed at the potential of -750 mV/sce including his
catalztic effect as an adatom. Simultaneously the presence of thalium in a
citrate solution has shifts the deposition potential to the positive values
diminishing the activation energy as well. The values of the activation
energy indicated that an adsorption mechanism of gold deposition was
predominating. Tafel line slopes have confirmed the electrochemical
reaction occured in two steps. The reaction kinetics has changed in the
presence of thalium. The reduction reaction of hydrogen had also a
significant influence on the electrochemical deposition of gold. The
influence of temperature on the deposition rate as well as on the
morphology of gold deposits was also evident. Gold deposits were observed
to be of bright yellow-gold colour and of small-size grain. In the presence
of Tl+ ion was possible to achieve higher current density of gold
deposition, but the current rise had no consequences to the grain size. The
homogeneus structure of gold coating was confirmed by the reflectancy
measurements. The chemical composition of Au-Si eutectic alloy had no
greater influence on the lectrochemical process thus the electrochemical
deposition of gold was equal to that one on the pure gold background.
Keywords: electrochemical deposition of gold, semiconductive component, Au-Si eutectic alloy, adatom of Tl+ ion, cyclic voltametry, AES and SEM analisys, structure and morphologz of gold deposit, electrochemical mechanism of gold deposition
- Type of paper
: Ph.D.
Title: ELECTROCHEMICAL INVESTIGATION OF THE SYSTEM Al-ELECTROLYTE
Faculty: Fakulteta za naravoslovje in tehnologijo Univerza v Ljubljani
Author: LOVREČEK MLADEN
Date of defense: 07/09/91
Language: hrvatski
Number of pages: 145
Summary: Study of the phase boundary phenomena is of special
interest on multiphase systems as it is Al/Oxide layer/Electrolyte. The
term "oxide" is in this case considered as reaction products of aluminium
with water, different in level of hydratation and morphologic forms.
Corrosion rate, resp. transfer of aluminium to the solution, as well as the
qualitative and quantitative aspects of interaction of the charged surface
with water dipoles and species from the solution depend on number of
factors. It can be assumed that in this pH of the electrolyte has
significant role. Therefore, the basic aim of this work is consideration of
the role and influence of pH on corrosion behaviour of the system Al-H2O.
The examined system consited of aluminium in concact with a series of water
solutions of electrolytes in the range of pH between 3 and 11, all of them
with the equal content of Cl- ions and prevalently the same ionic strenght.
Continuous potentiodynamic voltametry and determination of the concact
angle on the phase boundary, were applied as the basic experimental
methods, along with a number of supporting measurements.
After numerical and theoretical processing, obtained results were treated
individually and in mutual comparison. A comparative analysis with already
known characteristics of the Al-H2O system was also applied, particulary
with the diagrams of the electrochemical equilibria.
Phenomenologic characteristics of the investigated system have already
pointed to the specific influence of pH. In their consideration special
attention has been paid to the role of surface charge and amphoteric
dissotiation. In principle, the system was also discussed from the aspect
of free entlapy changes on the phase boundaries.
All the examined parameters have shown dependence of pH, however not, in
the same terms and not as a regular function. Paralelism of certain
functions was established, particulary in the range which - at pH 4.96 -
corresponds with the maximum of the wetting curve and indicates the
isoelectric point. All the considered results are showing characteristic
changes, respective with the conditions and boundaries of forming the
stable corrosion products as defined with pH diagrams, particulary of
hydrargilite. From this point of view the influence of the surface charge
was established as one of the key factors, determining behaviour of the
system in electrolytes of different values as well as interactions occuring
in the double layer. This influence shows to be particulary dominant in the
range around the isoelectric point.
Keywords: aluminium, contact angle, corrosion, corrosion rate, oxides, oxihydrates, surface amphoteric dissotiation, surface charge
