Graphics System Research Articles

Multi-level Graphical Password Authentication Scheme for Cloud (MGPASC)

The usage and management of information technology resources and services are revolutionized with the arrival of Cloud Computing. But, the revolution always comes with problems. Authentication is one such problem. Especially for Graphical Password Authentication System, there is a threat of shoulder surfing attack. This research presents a multi-level graphical password authentication mechanism by extending an existing method. UGPSCCCT (User guided Graphical Password Scheme for Cloud using Caesar Cipher Technique) is the existing method and this method is extended in this paper such that another level of security is added. The user credentials in this method are transmitted to the server in encryption format. A key is generated for every login to encrypt user details. The analysis of the proposed method is done by calculating the computational cost and communication cost of the proposed method.

Uma perspectiva pragmática para o estudo dos letramentos em periferias brasileiras

Este texto apresenta as linhas gerais de uma perspectiva pragmática para a abordagem dos letramentos em periferias brasileiras. ‘Pragmático’ aqui é entendido como aquilo que produz uma série de efeitos no mundo (conforme John L. Austin e Judith Butler) e também como prática que conjuga a tríade lei do sistema, rapidez da atividade e olhar reflexivo dos atores (conforme a abordagem da prática comunicativa de William Hanks). O artigo extrai as características de uma abordagem pragmática dos letramentos de trabalhos que problematizam e politizam a relação entre oralidade e escrita e que questionam o que conta como escrita numa sociedade. Retira essas características também de pesquisas etnolinguísticas com sistemas de escrita e de inscrição pictórica em grupos ameríndios, as quais sugerem não haver grupo humano sem um sistema convencional de grafismo. Em vista disso, a abordagem pragmática dos letramentos em periferias é, em última instância, uma forma de dialogar com pessoas que em alguma medida já escrevem, embora suas práticas não sejam legitimadas como escrita.

Graphical Workflow System for Modification Calling by Machine Learning of Reverse Transcription Signatures.

Modification mapping from cDNA data has become a tremendously important approach in epitranscriptomics. So-called reverse transcription signatures in cDNA contain information on the position and nature of their causative RNA modifications. Data mining of, e.g. Illumina-based high-throughput sequencing data, is therefore fast growing in importance, and the field is still lacking effective tools. Here we present a versatile user-friendly graphical workflow system for modification calling based on machine learning. The workflow commences with a principal module for trimming, mapping, and postprocessing. The latter includes a quantification of mismatch and arrest rates with single-nucleotide resolution across the mapped transcriptome. Further downstream modules include tools for visualization, machine learning, and modification calling. From the machine-learning module, quality assessment parameters are provided to gauge the suitability of the initial dataset for effective machine learning and modification calling. This output is useful to improve the experimental parameters for library preparation and sequencing. In summary, the automation of the bioinformatics workflow allows a faster turnaround of the optimization cycles in modification calling.

Meet the Others: Comprehending Crowdsourcing Graphic Design Practice in Indonesia

Visual communication design (VCD) research has so far been dominated by the study of artifacts rather than the design process. The study of the VCD process from a design perspective has not been taken seriously. The stagnation of research for design is influenced by the establishment of the modern design world along with its standard methods. Meanwhile, the world has changed, supported by advances in internet technology that is forming new systems and arrangements. Crowdsourcing is a phenomenon when the internet as an information medium develops into social media and crowd-based capital. The industrial revolution 4.0 gave rise to new companies with information technology platforms. One popular area of ​​crowdsourcing is graphic design. The graphic design crowdsourcing page brings together a community of designers and clients from all over the world. Indonesia providesone of the biggest graphic design crowdsourcing actors in the world. This research tries to go beyond standard, by preferring a study of designer community. Community members are seen as subjects who have knowledge of work experience in crowdsourcing graphic design systems. The large number of crowdsourcing designers in Indonesia who have survived in the community since 2008 certainly wasnot instantly formed. The phenomenon of crowdsourcing graphic design community in Indonesia in building theirexistence can be important knowledge when we are open-mindedly examiningthe presence of others. Keywords: Crowdsourcing, concept, graphic design, community, Indonesia. DOI : 10.7176/ADS/76-03 Publication date :September 30 th 2019

Caries Risk Assessment: Cariogram-An Insight

Dental caries is a public health problem. A new interactive graphical computorised system was introducted which is belived to record the caries risk assessment in less time depending of number of factors. This paper focus on the different sectors used in cariogram and its importance in reducing the caries risk.

Vision Based Position Control for Vertical Take-off and Landing (VTOL) Using One Singular Landmark

This project presents a vision based position control for Vertical Take-off and Landing (VTOL) to recognise a singular landmark for landing and take-off. Position control can provide safe flight and an accurate navigation. The circle landmark which used is an artificial landmark at known locations in an environment. Initially, a camera mounted on VTOL facing downward detecting landmarks in environments. A single circle used as landmark and VTOL will be control the position to reach the landmark. The images from the down-looking camera provided vision data to estimates position of VTOL from landmark. A mathematical method based on projective geometry using to locate VTOL on desired landmark from projected point in capture image. By compute the x-y coordinates of the VTOL with respect to landmark, height of camera above landmark will be obtained. VTOL can localize itself in known environment with pose estimation from landmark. The graphic user interface system (GUI) generate by MATLAB software is used to communicate with VTOL to control the VTOL position

A MULTI-SCALAR PHOTOGRAMMETRIC RECORDING APPROACH IN TERMEZ (UZBEKISTAN)

Abstract. This paper presents the preliminary results obtained during the 3D recording campaign carried out in 2018 by the Spanish-Uzbek IPAEB mission in the archaeological site of Termez (southern border of Uzbekistan). Ancient Termez is an important historical city within the Silk Road located in the ancient Bactria region. The archaeological work performed at the site since the beginning of the 20th century allowed a large fortified urban complex to be identified that includes other walled enclosures inside it, i.e., a Hellenistic- Seleucid fortress founded after the campaigns of Alexander the Great in the late 4th century BC, several Buddhist monastic complexes dated to the Kushan period (1st to mid-3rd centuries), and a large urban settlement dated to the Islamic period which includes the city proper or shahristan and the suburbs or rabad. After the destruction by Genghis Khan in 1220, Termez was rebuilt following a different plan. Major changes involved the movement of the pottery workshops from the rabad to the previous shahristan. The research focuses on: a) the identification, study and archaeological contextualization of ceramic production centres located in different areas of the ancient Termez from the Kushan to the Islamic period (1st to 14th centuries AD); b) the integration of the pottery workshops into the general topography of the site and c) the study of their evolution in relation to the transformation of the urban design. Since the site is currently located in a military area – close to the border area between Uzbekistan and Afghanistan –, the archaeological work is restricted to specific zones and the use of aerial devices such as drones is forbidden. However, this research requires both micro and macro spatial approaches to accurately record all the archaeological structures and to evaluate the integration and evolution of the pottery workshops into the general topography of the city. In order to fill this gap, declassified images of the CORONA satellite program were analyzed and compared to historical and archaeological data. In addition, we propose a geometrical and graphical recording and distribution system of the kilns – located in the rabad and the shahristan – and the ceramics produced and used in Termez during the period studied by means of photogrammetric techniques. The results are aimed at management through open-source 3D formats and web mapping GIS libraries combined with historical satellite information that defines the different archaeological areas.

Early natural regeneration patterns of woody species within gaps in a temperate secondary forest

Forest gaps are important small-scale disturbances that initiate forest succession. However, natural regeneration patterns within gaps remain unclear, especially in temperate secondary forests. In this study, three-dimensional graphic systems were established to show the whole regeneration patterns of woody species with different shade tolerance in natural gaps. Furthermore, all gaps were classified into three size classes, and each gap was divided into two parts, canopy gaps (CGs) and gap peripheries (GPs). A total of 34 woody species were found in the 41 surveyed gaps, but almost no tree species had a high importance value index (≥ 0.100). Total plant density decreased from the small gaps to the large gaps, showing a density trend similar to that of shade-tolerant species. Total species richness peaked in the medium gaps, which indicated that medium gaps could provide moderate environments for most woody species. Both the species richness and plant density of shade-tolerant species were lower in CGs than in GPs, regardless of gap sizes. In contrast, both the species richness and plant density of shade-intolerant species were higher in CGs than in GPs. Interestingly, intermediate shade-tolerant species exhibited a “doughnut” regeneration pattern in the large gaps, which indicated that they could neither compete with shade-intolerant species in CGs nor invade GPs occupied by shade-tolerant species. Our findings suggest that gap formation could benefit woody species regeneration, but subsequent treatments based on gap silviculture are needed to eliminate low-value species and manage target tree species, which would help accelerate the restoration of secondary forests.

The architecture design of astronomical observation and system monitoring and control software for large radio telescope

Astronomical observation and system monitoring and control software is an important component for the wide-band, multi-scientific, and general-purpose QiTai Radio Telescope. Its function is to coordinate the assignments, control and monitor the equipment either remotely or locally, and to perform real-time calibration and adjustment for high precision observations. As the number of the controlling and monitoring nodes increases, the complexity of the observation system also increases and the traditional centralized controlled system can no longer meet the system requirements. This paper proposes an architecture design of astronomical observations which based on message queue middleware ZeroMQ and serialized communication. The architecture consists of a graphical user interaction system, dynamic scheduling, coordination center, health monitoring system, data processing system, local control system and hardware system. As the core of the software system, the function of the coordination center has been emphasized on how to schedule the sequence of observation tasks in most previous studies rather than on scheduling among different systems. In our design, the coordination center controls and manages other systems through task management, multi-threading and message caching making the astronomical observation system functions as an integrated whole. The architecture design adopts a distributed design pattern in combination with the ideas of hierarchy, design patterns and microservices design to equip the system with better cross-platform and highly automated performance requirements.

Optimization of Total Harmonic Distortion in Multilevel Photo Voltaic Inverters Using Genetic Algorithm

In this research, an optimization technique known as Genetic Algorithm is applied to multilevel PV inverters in order to design a Total Harmonic Distortion system with reduced harmonics content as well as able to determine the optimal switching angle while maintaining the required fundamental voltage at the same time. The optimization technique can be implemented on any number of levels of multilevel inverters. For instance, an inverter having 7-level configuration is considered as the initial scenario for the upcoming simulations. The working principle of the Genetic Algorithm along with the functionality of the Graphical User Interface system is constructed and analyzed using MATLAB simulation environment. The result of the implemented optimization technique shows the optimal switching angles at various modulation indices as well as the minimum Total Harmonic Distortion of the system. In short, the purpose of the implemented system was greatly achieved in accordance to the set objectives and further improved its efficiency upon successfully overcoming the limitations of previous research works.

Method of formalizing the layout of the internal compartments of aircraft

The mathematical formulation of the aircraft’s internal layout problem is described as an optimization problem, with an indication of its objective function, constraints, and performance criteria. The approach (receptor methods and apparatus of normal equations) is justified, which makes it possible to move from enumeration method of placing added objects to intelligent algorithms of automated placement when creating geometric models of automated layout. It was shown that preparing the aircraft for layout automation complicates the mathematical description of geometric models of added objects, increases the complexity of their visualization in modern computer graphics systems and makes the need to create an additional interface between new geometric models and common CAD systems (SolidWorks, AutoCAD, COMPAS, etc.).

Automation of the inner design of the aircraft

The task of forming the wind-swept surface according to the results of the aircraft’s inner design is described. The approach of the integration of natural and virtual prototyping in the design of equipment compartments is substantiated. Such approaches open up new possibilities for creating intelligent composition algorithms that eliminate the "blind search". For the practical implementation of these approaches, it is necessary to link the appropriate software to standard geometric modeling systems in the form of additional computational modules. Preparing the aircraft for design automation complicates the mathematical description of geometric models of placed objects, increases the complexity of their visualization in modern computer graphics systems and the need to create an additional interface between new geometric models and common CAD systems (SolidWorks, AutoCAD, COMPAS, etc.).

GPAS - Graphical Password Authentication System for Software Privacy Protection

Now daily's larger part of PC frameworks, passwords is the technique for decision for validating clients. A procedure by which a framework confirms the personality of a client is known as 'Confirmation'. Confirmation may likewise be summed up by saying that "to validate" signifies "to approve". Confirmation is the main line of resistance against trading off classification and uprightness. The most generally and normally utilized confirmation is conventional "Username" and "Secret phrase". For such verification by and large content (alphanumeric) is utilized. It is outstanding, in any case, that passwords are defenseless to assault: clients will in general pick passwords that are anything but difficult to recollect, and regularly this implies they are likewise simple for an assailant to get via hunting down hopeful passwords. Token and biometric based validation frameworks were presented as an option for those plans. Be that as it may, these plans are all around expensive. Consequently, Graphical plan was acquainted as a variety with the login/secret key plan. In this paper we investigate a way to deal with client confirmation that sums up the idea of a literary secret key and that, as a rule, improves the security of client verification over that given by printed passwords. In this proposed framework we have utilized another system for confirmation. It is a variety to the login/secret phrase plan utilizing graphical secret phrase utilized in a graphical way. We have presented a structure of our proposed Graphical Password Authentication System (GPAS), which is resistant to the basic assaults endured by other confirmation plans.

A dialectical approach to the systematic analysis of geovisual communication using Bertin’s visual variables

Abstract. This presentation presents a dialectical approach for the analysis and synthesis of geovisual communication systems using the graphic variables of Jacques Bertin as the primary analytical structure. This approach to studying geovisual communication accounts for its dynamics and interaction. It builds primarily on semiotic concepts advanced by Roland Barthes and Umberto Eco that emphasize the interactions between author and reader and the cultural circulation of knowledge. It relies on a Kantian critical epistemology to move beyond an instrumental description of a graphics-based system of communication. The visual system of affordances made and understood with a geovisualization produces situative meaning involving signification and interpretation, which is neither static nor discrete, but transforms what is known and what can be known. These conclusions lead to theoretical insights related to prior discursive concepts of visual communication and raise some questions for future research about the socio-cognitive affordances of cartographic visualization. A practical example shows the empirical approach and initial validation.Visual Variables Structure CommunicationThe seminal contributions of Roland Barthes point to the process of embedding visual meaning regarding sign, signifier, signified, sign and concept as an extension to Saussure's dyadic approach as two semiological systems, which accounts for the importance of Saussure's bar in the communication of meaning. The two systems code the knowledge of communication, accounting for the situatedness of meaning and its discursive making that connects a sign to a cultural context. Umberto Eco goes beyond Pierce’s icon, index, and symbol trichotomy of a sign through an ongoing chain of interpretative referrals. This approach starts with an active collaboration between creator and reader. It can involve multiple circumstances, cultural aspects and evolve. Visual variables structure communication in an ongoing process.The signification of a visual variable is analogous to an atom in a communication process. The analysis of the visual variables of a graphic element in a communication systems sense commences with an analysis of these visual variables related to individual elements and complex symbols. Barthes’ functions, actions, and narrative offer a valuable framework. A synthesis follows that considers the epistemological aspects of a partial system and what its functions purport to do and what they actually do. The analytically determined relationships can be synthesized into webs of explicit and implicit meanings associated with Barthes' structure. This combination and visual intermingling of graphic representations in a geovisualization broaden then to consider their interactions and associations with creator and reader. The visual encompasses the semiotic communication of meaning. The dialectical and critical consideration of the relations and the structure of the communication leads to an improved comprehension of the affordances manifest in the graphical communication system. It also begins to account for mental aspects of perception.A model of geovisual communication?The theory and methods of this semiotic approach involve considering Bertin’s graphical variables as elements of a model that corresponds to the communication system. Further, the structure of the geovisualization can be modeled symbolically to take up the questions how coding and decoding take place and made reliable given the dynamics of communication and the reliance on conventions in most cartography. This presentation closes with a summary of the benefits of a semiotic approach to the analysis and teaching of geovisual communication.

보완‧대체의사소통(AAC) 상징체계 수립을 위한 그림상징 도상성에 관한 고찰

보완‧대체의사소통(AAC) 상징체계 수립을 위한 그림상징 도상성에 관한 고찰

NGRID: A novel platform for detection and progress assessment of visual distortion caused by macular disorders

This paper presents a new graphical macular interface system (GMIS) for accurate, rapid, and quantitative measurement of visual distortion (VD) in the central vision of patients suffering from macular disorders. In this system, a series of predefined graphical patterns or multiple grids (NGRID) are randomly selected from a library of patterns and visualized on the screen, then the VDs identified by the patient are recorded as binary codes using various control methods including speech recognition. Scalable Vector Graphics (SVG) is used to generate the patterns and save them into a central library. Based on the projected patterns and the patients’ responses, a VD graph or so-called heatmap is generated for eye-care purposes. We demonstrate and discuss the functionality of the proposed system for the detection and progress assessment of a macular condition in patients suffering from Central Serous Chorioretinopathy (CSR). Also, we characterize the proposed technique to evaluate the systematic error and response time on healthy human subjects with normal vision. Based on these results, the voice recognition input method exhibits a lower error but a higher response time compared to other input devices. We run the proposed NGRID VD technique to evaluate the effect of CSR on the visual field of a CSR patient. The generated heatmaps are in agreement with standard Optical Coherence Tomography (OCT) images obtained at different times from both the left and right eyes. These results reveal the applicability of the proposed technique for the detection and assessment of macular disorders. Based on these results, the proposed NGRID platform shows great promise for use as an alternative solution for in-home monitoring of various macular disorders and as a means of forwarding responses to secured cloud facilities for future data analysis.

Graphical User Authentication System Resistant to Shoulder Surfing Attack

User authentication is one of the most significant issues in the field of Information Security. The most common and convenient authentication method used is the alphanumeric password which has significant drawbacks. To overcome the vulnerabilities of traditional methods, graphical password schemes have been developed as possible alternative solutions to text-based scheme. A potential drawback of graphical password schemes is that they are more vulnerable to shoulder surfing than conventional alphanumeric text passwords due to their visual interface. To overcome the shortcoming of existing graphical password schemes this project focuses on developing a graphical authentication system that is resistant to shoulder surfing attack.

FarMyo: A Serious Game for Hand and Wrist Rehabilitation Using a Low-Cost Electromyography Device

One of the strategies used in recent years to increase the commitment and motivation of patients undergoing rehabilitation is the use of graphical systems, such as virtual environments and serious games. In addition to contributing to the motivation, these systems can simulate real life activities and provide means to measure and assess user performance. The use of natural interaction devices, originally conceived for the game market, has allowed the development of low cost and minimally invasive rehabilitation systems. With the advent of natural interaction devices based on electromyography, the user's electromyographic data can also be used to build these systems. This paper shows the development of a serious game focused on aiding the rehabilitation process of patients with hand motor problems, targeting to solve problems related to cost, adaptability and patient motivation in this type of application. The game uses an electromyography device to recognize the gestures being performed by the user. A gesture recognition system was developed to detect new gestures, complementing the device's own recognition system, which is responsible for interpreting the signals. An initial evaluation of the game was conducted with professional physiotherapists.

The Effects of Adaptive Synchronization on Performance and Experience in Gameplay

Adaptive synchronization (Async) is a recent display technology that lowers frame time mean and variation by altering communication between display and GPU. While conventional graphics systems introduce delay to match irregular GPU frame rates to regular display refresh rates, Async systems instead match display refresh rates to to irregular frame rates. Both NVIDIA and AMD claim that Async displays improve experience for enthusiast gamers. In a first, controlled examination of these claims with non-professionals playing a popular first-person shooter, we find that Async improves gaming performance, can improve experience, and has intriguing relationships to game familiarity and years of gameplay.

Numerical fundamentals and interactive computer graphics system for the nonlinear analysis of planar frames

Abstract Recent scientific and computational advances have facilitated the analysis of slender structural systems subject to instability. With the employment of more sophisticated numerical tools and algorithms, it is possible to accurately determine the critical points (limit and bifurcation loads) as well as the post-critical behavior of the structural system. In the computational context, efficient data structures are needed to enable code and graphic interface expansion for the generation of models and visualization of the results obtained. Thus, an interactive object-orientated graphic computational system is presented herein. It has been developed using MATLAB/GUI, with pre-processing, analysis and post-processing capacities for planar structural frames. The nonlinear finite element developed and implemented for the structure modeling is formulated considering second order effects. Therefore, with the computational tool presented, the geometric nonlinear effects and stability of the structural system can be directly addressed, and the visualization of the numerical results are accessed through interactive controls that permit data inclusion and analysis verification. The engineer-designer can see the structural model discretization, the equilibrium path, its deformation configuration, the force and bending moment diagrams at the moment that he runs the program and in each load step. It is also possible to export the images, videos or tables of the obtained numerical results. The example presented demonstrates the capacity of the developed graphic computational system.