|
0. Complete issue
|
- 1. The impact of different navigation speeds on cybersickness and stress level in VR
- Pages: 5-12
- Ana Agić, Ella Murseli, Lidija Mandić, Lea Skorin – Kapov
- Abstract | Download | View
Abstract
The aim of this research was to determine if the speed of movement
in virtual environments has an impact on cybersickness as potentially
experienced by an end user of the system. Cybersickness is a common side
effect in virtual reality (VR) systems, shown to have a negative influence
on user experience. It can be described as a mismatch between vestibular
and oculomotor sensors, where a person has a feeling of movement even
though there is none. In this research, we study the impact of different
navigation speeds in VR on cybersickness, relying on both subjective ratings
indicating cybersickness symptoms, and objective measures of stress
level. We wanted to find out if there is a correlation between objective
and subjective metrics used. For test purposes, we used the HTC Vive VR
headset and scenery from the Talos Principle VR game (where subjects
can easily shift between three different movement speeds). Subjective
ratings were collected using a questionnaire involving 11 questions used to
evaluate cybersickness symptoms. Objective metrics were collected using
the Pip Biosensor. A total of 28 participants took part in the study, while 2
participants withdrew due to physical discomfort. Results obtained from the
Pip device show no statistically significant difference between navigation
speeds for relaxed, stressed, and steady states. Some statistically significant
correlations were found between gender and stomach ache, need to vomit,
and physical discomfort while wearing HMD. Furthermore, correlation was
found between age and variables of nausea in transport vehicles and vertigo.
Other correlations found are described in the results section of the paper.
|
-
2. Effect of Color Output Modification Approach (COMA) on the gray balance: A mismatch of device calibration, destination and source profiles, and halftone screening
- Pages: 13-26
- Haji Naik Dharavath
- Abstract | Download | View
Abstract
The purpose of this applied research in the digital print production was to
determine the influence of applied Color Output Modification Approaches
(COMA) or Color Output Sequences (COS) to determine the colorimetric
variations (COLVA) on the gray balance (GB) hue in a Color Managed Digital
Printing Workflow (CMDPW). The experiment analyzed the application of
eight COMA or COS on the digital color output. The data contained in this
report are the result of an experiment conducted to test an accepted color
management practice to gain a greater understanding of the presumptions
associated with the application of correct print parameters (Calibration,
Screening, Resolution, Source and Destination Profiles) of CMDPW. These
parameters rely on the 4-C’s (Calibration, Characterization, Conversion and
Control) of Color Managed Workflow (CMW). The experiment examined
the eight COMA as independent groups (K = 8) using a one-way Analysis
of Variance (ANOVA) with equal n’s method (at α = 0.05) to determine
the significant colorimetric variations that exists among the [K = 8, N =
800, ni = 80, nt = 640] groups gray balance average hue deviations. With
eight groups, a one-tailed, non-directional hypothesis was established.
The conclusions of this study are based upon an analysis of the COLVA
by ANOVA test data and associated findings. The data from the ANOVA
revealed significant differences in the COLVA of the reproduction among the
multiple COMA groups. The colorimetric data derived by the experiment
suggest that selection of correct print parameters is an important step in a
CMDPW as it relates to achieving accurate GB for a desired use/purpose.
|
-
3. Research of the backing technology of the book block spine
- Pages: 27-36
- Svitlana Havenko, Іryna Pik, Lyubomyra Kulik, Ivanna Konyukhova, Raisa Rybka, Olha Vorzheva
- Abstract | Download | View
Abstract
The factors influencing the backing process of the book block spine are determined
and their priorities are established. The method of backing the spine of
book blocks in the production of publications by the method of perfect binding
is proposed. This method involves gluing the backing-captal braid to the
spine of the block with a pre-applied adhesive layer. The positive influence
of the presence of the adhesive layer of a certain thickness on the physical
and mechanical characteristics of the backing material is determined. It is
established that the thickness of the blocks, the type of paper, from which the
publications are made, and the direction of the cutting of the backing material
is influenced by the process of backing the spine. With the growth of the
tension deformation of backing materials from 1.2% (for kraft paper) to 3.8%
(for the backing braid), the stability of the spine zone of the block increases to
damage in the process of multiple flippers. The investigated materials in the
longitudinal direction are more durable than in the transverse in 2-2.5 times,
so the backed blocks can withstand 4,800 to 15,000 flippers when using kraft
paper and backing braid, respectively. With the help of optical microscopy,
changes in the structure of the backing-captal braid after the multiple flippers
of the book block have been investigated. It is shown that the strength of the
binding of a book block depends on the choice of the method of backing. In
the process of optimizing the parameters of backing the block root, various
variants of linear models were tested, which are described by the functions
of the dependences of the breaking forces in the longitudinal or transverse
directions Z on the thickness of the block Tb. The allowable elongation of the
edging material for its longitudinal and transverse cuttingV is also taken into
account. The obtained models allow for the particular type of paper to pick
up the necessary backing materials, which will provide a sufficient strength to
the perfect binding book blocks.
|
- 4. A mathematical approach for creative graphics design
- Pages: 37-46
- Panchanand Jha, Bibhuti Bhusan Biswal
- Abstract | Download | View
Abstract
Mathematics is most beautiful thing in our daily life but when it comes to
equations and formulae people seems to be unpleasant. This equations
and formulae exhibits interactive properties and relation in our daily life.
It is sure that the almost all beautiful thing in our nature even Universe
unveils mathematical properties. These properties produce many patterns
and shape and is directly related to geometric algebra as we can see in
nature for example, fluorescent green beetle and colourful galaxies. These
gorgeous properties of nature can be transformed into equations and logics.
Therefore, the main aim of this paper is to generate creative graphics
using mathematical equations such as number theory, position vectors
and trigonometry functions. The sectional organization of this paper is as
follows: section 1 gives the introduction of interactive graphic design and
related work. Mathematical approach for graphic design has been briefed
in section 2. In section 2 adopted algorithms and Graphical visualization
of design is given. Graphic designs are applied to Indian ethnic wear and
T-shirts. Last Section gives the conclusions and further scope of this work.
|
- 5. Flame Retardant Hybrid Paper Coatings with PVA - Melamine / Zinc Borat
- Pages: 47-54
- Emine Arman Kandirmaz
- Abstract | Download | View
Abstract
Papers are raw materials with high flammability. Some of the products
produced in the printing industry are used in places requiring
high heat resistance. High-tech papers can be produced by adding
a flame retardant to the paper coating formulation or pulp.
In this study, it is aimed to prepare polyvinyl alcohol (PVA )- zinc
borate / melamine / zinc borate-melamine paper coating formulations
and to produce flame retardant paper by coating on paper.
For this purpose, primarily zinc borate is produced by boric acid and zinc
carbonate reaction . In the second part of the study, four different coating
formulations were prepared by adding zinc borate, melamine and
their double mixtures to the main formulation, where PVA polymer matrix
was used as binder, and coatings were made on an 80g/m2 paper surface.
Limiting oxygen index (LOI ), gloss, color, surface energy and contact
angles properties of the produced papers were determined. Offset printing
was done onto coated papers with IGT C1 test printing machine. All
produced flame retardant papers have good printability characteristics.
|
- 6. Influence of chitosan coatings with rosemary essential oil on mechanical and physical properties of packaging paper
- Pages: 55-62
- Urška Vrabič Brodnjak, Katarina Tihole
- Abstract | Download | View
Abstract
Recently, coated paper substrates have been used in a wide range of
packaging applications. In this research, we present a chitosan with rosemary
essential oil, paper coating as water and possible repellent resistant
solution on biological basis. The aim of this research was to coat two
different uncoated (also calendared) papers with a bio-based coating solution
and to analyse mechanical, physical properties, resistance of coating
and print ink. The resulting coated chitosan-rosemary oil, papers showed
remarkable water resistance (Cobb60 values 5.18 and 4.55 g/m2). The good
mechanical properties of the coated papers increased after the coating
treatment. Namely, elongation at break and tear strength improved due
to the structure of the coating itself. The resistance of coatings on printed
surfaces also showed sufficient results for further packaging applications.
|
- 7. Augmented reality support for self-service automated systems
- Pages: 63-68
- Igor Baranovski, Stevan Stankovski, Gordana Ostojić, Sabolč Horvat, Tegeltija Srđan
- Abstract | Download | View
Abstract
Augmented Reality (AR) is a way of looking at the real environment in which
the computer-generated environment is located. The use of augmented reality
changes the way we interact with the real environment. In the past few
years, with the development of technology, augmented reality is gaining in
importance and becoming closer to everyday users. Many companies such as
Google, Sony, HTC and Samsung are investing heavily in the development of
this field. Augmented reality is finding usage in various areas such as entertainment,
marketing, navigation, surveillance, system maintenance, and
user training. The purpose of this paper is to present the possibilities of using
augmented reality systems for the needs of self-service automated systems.
|
