scholarly journals Deepfake-Image Anti-Forensics with Adversarial Examples Attacks

2021 ◽  
Vol 13 (11) ◽  
pp. 288
Author(s):  
Li Fan ◽  
Wei Li ◽  
Xiaohui Cui
Keyword(s):  
State Of The Art ◽  
Poisson Noise ◽  
Future Research ◽  
Detection Accuracy ◽  
Generalization Performance ◽  
Image Forensic ◽  
Adversarial Examples ◽  
Adversarial Example ◽  
The Impact

Many deepfake-image forensic detectors have been proposed and improved due to the development of synthetic techniques. However, recent studies show that most of these detectors are not immune to adversarial example attacks. Therefore, understanding the impact of adversarial examples on their performance is an important step towards improving deepfake-image detectors. This study developed an anti-forensics case study of two popular general deepfake detectors based on their accuracy and generalization. Herein, we propose the Poisson noise DeepFool (PNDF), an improved iterative adversarial examples generation method. This method can simply and effectively attack forensics detectors by adding perturbations to images in different directions. Our attacks can reduce its AUC from 0.9999 to 0.0331, and the detection accuracy of deepfake images from 0.9997 to 0.0731. Compared with state-of-the-art studies, our work provides an important defense direction for future research on deepfake-image detectors, by focusing on the generalization performance of detectors and their resistance to adversarial example attacks.

Post-occupancy evaluation of outdoor spaces on the campus of the Federal University of Juiz de Fora, Brazil

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ana Clara Carvalho Tourinho ◽  
Sabrina Andrade Barbosa ◽  
Özgür Göçer ◽  
Klaus Chaves Alberto
Keyword(s):  
Critical Role ◽  
Future Research ◽  
Content Type ◽  
University Campuses ◽  
Post Occupancy Evaluation ◽  
Outdoor Spaces ◽  
The University ◽  
The Impact ◽  
Practical Implications

PurposeUsing the campus of a Brazilian university as case study, this research aims to identify which aspects of the outdoor spaces are the most significant in attracting people.Design/methodology/approachThis research relies on the application of different post-occupancy evaluation (POE) methods, including user tracking, behavioural mapping and questionnaires, on one plateau of the campus.FindingsThree group of aspects (socialization, proximity and infrastructure) were identified as key elements in explaining the impact of the campus physical characteristics on users’ behaviour. The results indicate that having characteristics of at least one group of aspects in those spaces can guarantee their vitality and, if there is presence of attributes of more than one group, liveliness can be increased.Research limitations/implicationsFurther studies should be conducted on an entire campus to identify other spatial elements in the three groups.Practical implicationsThis research contributes to the planning of future campuses and to solutions to the existed ones, indicating the most relevant spatial characteristics to be considered. Additionally, the combination of different methods may be useful to future research.Originality/valueMost of the investigations on the university campuses focus on the buildings, and little research has investigated the outdoor spaces, although they play a critical role in learning and academic life, where people establish social, cultural and personal relationships. In addition, studies using several POE allowed a consistent and complete diagnostic about the aspects of the campus, giving recommendations for future projects.

scholarly journals Automatic License Plate Recognition: A Review with Indonesian Case Study

2018 ◽  
Vol 5 (2) ◽  
pp. 258-270
Author(s):  
Aris Budianto
Keyword(s):  
State Of The Art ◽  
Developed Countries ◽  
Transportation Systems ◽  
Future Research ◽  
License Plate ◽  
License Plate Recognition ◽  
Previous Knowledge ◽  
Video Recognition ◽  
Automatic License Plate Recognition

The Automatic License Plate Recognition (ALPR) has been becoming a new trend in transportation systems automation. The extraction of vehicle’s license plate can be done without human intervention. Despite such technology has been widely adopted in developed countries, developing countries remain a far-cry from implementing the sophisticated image and video recognition for some reasons. This paper discusses the challenges and possibilities of implementing Automatic License Plate Recognition within Indonesia’s circumstances. Previous knowledge suggested in the literature, and state of the art of the automatic recognition technology is amassed for consideration in future research and practice.

scholarly journals Enhancing Students’ Understanding and Revision of Narrative Writing through Self-Assessment and Dialogue: A Qualitative Multi-Case Study

2015 ◽  
Author(s):  
Stephanie Baxa
Keyword(s):  
Self Efficacy ◽  
Fifth Grade ◽  
Future Research ◽  
Writing Conferences ◽  
Teacher Language ◽  
Self Assessment ◽  
Self Assessments ◽  
Teacher Assessments ◽  
The Impact

With students losing hope when faced with challenges in the classroom, daily student-involved formative assessment that contributes to a growth mindset is essential. Through self-assessment and dialogue, students can generate feedback used for improvement of their writing, and teachers can give feedback that fosters self-efficacy. The purpose of this qualitative multi-case study was to explore the growth of fifth-grade writers as they participated in self-assessment, writing conferences with their teacher, and story revision. Research questions focused on students’ ability to explain learning targets and strengths and weaknesses of their writing and their ability to revise their writing. The participants, two male and one female, were randomly chosen from the teacher/researcher’s fifth-grade classroom in a large public school in the Midwest. Data sources included audio-recorded interviews and writing conferences, student-written work and self-assessments, and teacher assessments and notes. Self-assessment and dialogue with the teacher served as tools for providing feedback to the student and the teacher. Throughout implementation of the instructional strategies, students were able to talk about the learning targets and the strengths and weaknesses of their writing and were motivated and able to revise their writing. Limitations of the study included the length of the study and diversity of participants. Suggestions for future research included exploring ways to elicit more student feedback and the impact of teacher language during writing conferences on the self-efficacy of students.

scholarly journals TAX RESEARCH Financial Accounting versus Tax Accounting - Tax Rules’ Impact on Investment Decisions

2016 ◽  
Vol 4 (1) ◽  
pp. 9
Author(s):  
Dr.Sc. Skender Ahmeti ◽  
Dr.Sc. Muhamet Aliu ◽  
MSc. Alban Elshani ◽  
Yllka Ahmeti
Keyword(s):  
Investment Decisions ◽  
Financial Statements ◽  
Financial Accounting ◽  
Future Research ◽  
International Accounting Standards ◽  
Corporation Tax ◽  
Tax Research ◽  
The Impact

This paper provides guidance for all those interested in research related to tax. In the study are included three main areas dealing with taxes and about taxes: (1) the role of information in corporation tax expenditures under the rules and laws of the country against financial statements according to international accounting standards, (2) case study PTK; how much effective tax and tax on extra profit has it paid (3) the impact of tax rules on investment decisions - the reasons and profits of the company and the host country. We will try to summarize here the three areas of study and come to some conclusions on how to deal with fiscal policy in Kosovo. In addition, we will offer our opinion on some interesting and important questions for future research.

Researching Telework

2000 ◽  
pp. 255-276 ◽  
Author(s):  
Nicole B. Ellison
Keyword(s):  
Organizational Culture ◽  
State Of The Art ◽  
The State ◽  
Future Research ◽  
Scholarly Literature ◽  
Home Based ◽  
The Family ◽  
The Individual ◽  
The Impact

This chapter examines the state of the art in telework research. The author reviews the most central scholarly literature examining the phenomenon of telework (also called home-based work or telecommuting) and develops a framework for organizing this body of work. She organizes previous research on telework into six major thematic concerns relating to the definition, measurement, and scope of telework; management of teleworkers; travel-related impacts of telework; organizational culture and employee isolation; boundaries between “home” and “work” and the impact of telework on the individual and the family. Areas for future research are suggested.

scholarly journals Dynamic Network Pruning with Interpretable Layerwise Channel Selection

2020 ◽  
Vol 34 (04) ◽  
pp. 6299-6306
Author(s):  
Yulong Wang ◽  
Xiaolu Zhang ◽  
Xiaolin Hu ◽  
Bo Zhang ◽  
Hang Su
Keyword(s):  
Prediction Accuracy ◽  
State Of The Art ◽  
Dynamic Network ◽  
Detection Algorithm ◽  
Network Pruning ◽  
Robust Model ◽  
Adversarial Examples ◽  
Adversarial Example ◽  
Decision Paths ◽  
Pruning Methods

Dynamic network pruning achieves runtime acceleration by dynamically determining the inference paths based on different inputs. However, previous methods directly generate continuous decision values for each weight channel, which cannot reflect a clear and interpretable pruning process. In this paper, we propose to explicitly model the discrete weight channel selections, which encourages more diverse weights utilization, and achieves more sparse runtime inference paths. Meanwhile, with the help of interpretable layerwise channel selections in the dynamic network, we can visualize the network decision paths explicitly for model interpretability. We observe that there are clear differences in the layerwise decisions between normal and adversarial examples. Therefore, we propose a novel adversarial example detection algorithm by discriminating the runtime decision features. Experiments show that our dynamic network achieves higher prediction accuracy under the similar computing budgets on CIFAR10 and ImageNet datasets compared to traditional static pruning methods and other dynamic pruning approaches. The proposed adversarial detection algorithm can significantly improve the state-of-the-art detection rate across multiple attacks, which provides an opportunity to build an interpretable and robust model.

scholarly journals The impact of single engine taxiing on aircraft fuel consumption and pollutant emissions

2018 ◽  
Vol 122 (1258) ◽  
pp. 1967-1984 ◽  
Author(s):  
M. E. J. Stettler ◽  
G. S. Koudis ◽  
S. J. Hu ◽  
A. Majumdar ◽  
W. Y. Ochieng
Keyword(s):  
Fuel Consumption ◽  
Pollutant Emissions ◽  
Future Research ◽  
Reduce Fuel Consumption ◽  
Flight Data ◽  
Set Operations ◽  
Aircraft Fuel ◽  
Fuel Consumption And Emissions ◽  
The Impact

ABSTRACTOptimisation of aircraft ground operations to reduce airport emissions can reduce resultant local air quality impacts. Single engine taxiing (SET), where only half of the installed number of engines are used for the majority of the taxi duration, offers the opportunity to reduce fuel consumption, and emissions of NOX, CO and HC. Using 3510 flight data records, this paper develops a model for SET operations and presents a case study of London Heathrow, where we show that SET is regularly implemented during taxi-in. The model predicts fuel consumption and pollutant emissions with greater accuracy than previous studies that used simplistic assumptions. Without SET during taxi-in, fuel consumption and pollutant emissions would increase by up to 50%. Reducing the time before SET is initiated to the 25th percentile of recorded values would reduce fuel consumption and pollutant emissions by 7–14%, respectively, relative to current operations. Future research should investigate the practicalities of reducing the time before SET initialisation so that additional benefits of reduced fuel loadings, which would decrease fuel consumption across the whole flight, can be achieved.

scholarly journals Vocabularies of Citizenship: West Coast Secondary Students Describe Their Civic Subjectivities, Skills, and Classrooms

2017 ◽  
Vol 12 (1) ◽  
Author(s):  
Jamie Elbert
Keyword(s):  
Secondary Students ◽  
Social Identity Theory ◽  
Online Survey ◽  
Future Research ◽  
Popular Narrative ◽  
Civic Skills ◽  
Multiple Case ◽  
The Impact ◽  
Support Students

Canada’s changing geopolitical landscape will require a generation of engaged and active citizens. Citizenship education in British Columbia must negotiate conflicting narratives while opening spaces for students to develop civic skills and subjectivities. Given negative program reviews, empirical evidence for the impact of identity - especially group identifications - on behaviours and beliefs, and continued low youth political engagement, there is a great need to understand how citizenship and civic subjectivities are constructed in real school contexts in order to gain insight into how secondary civics classrooms might support students’ active political voices and development of efficacious subjectivities. This article reports preliminary results from a large mixed methods, multiple-case study project. The data reported here focuses on students (n = 64) from two purposefully sampled secondary school classrooms on Vancouver Island: a special civics program, and a regular stream Social Studies classroom in the same school. Data collection consisted of a class-wide online survey near the beginning of the course. Grounded in the larger understandings of social identity theory and rooted cosmopolitanism, qualitative data from open-ended questionnaire responses analyzed with a constant comparative coding technique explored the extent to which students construct regional, national, or global notions of citizenship. A preliminary report of quantitative items investigates the level of conflict present between levels of identification and suggests avenues for future research. Examined against previous research and the theory of rooted cosmopolitanism, this project aims to question the popular narrative of youth apathy and to describe the ways in which students characterize their civic subjectivities. In giving voice to student perspectives on their civic selves and their Civics classrooms, this study aims to contribute to more representative classrooms and pedagogies.

Preliminary research on sponge city concept for urban flood reduction: a case study on ten sponge city pilot projects in Shanghai, China

2020 ◽  
Vol 29 (6) ◽  
pp. 961-985
Author(s):  
Shuxian Feng ◽  
Toshiya Yamamoto
Keyword(s):  
Field Survey ◽  
Comparative Method ◽  
Future Research ◽  
Pilot Projects ◽  
Urban Flood ◽  
Sponge City ◽  
Content Type ◽  
Surrounding Environment ◽  
The Impact

PurposeThis research aimed to determine the differences and similarities in each pilot project to understand the primary design forms and concepts of sponge city concept (SCC) projects in China. It also aimed to examine ten pilot projects in Shanghai to extrapolate their main characteristics and the processes necessary for implementing SCC projects effectively.Design/methodology/approachA literature review and field survey case study were employed. Data were mostly collected through a field survey in Shanghai, focusing on both the projects and the surrounding environment. Based on these projects' examination, a comparative method was used to determine the characteristics of the ten pilot SCC projects and programs in Shanghai.FindingsSix main types of SCC projects among 30 pilot cities were classified in this research to find differences and similarities among the pilot cities. Four sponge design methods were classified into ten pilot projects. After comparing each project size using the same geographical size, three geometrical types were categorized into both existing and new city areas. SCC project characteristics could be identified by combining four methods and three geometrical types and those of the SCC programs by comparing the change in land-use and the surrounding environment in ten pilot projects.Originality/valueThe results are valuable for implementing SCC projects in China and elsewhere and future research on the impact of SCC projects.

Analysis of Complexities in Natech Disaster Risk Reduction and Management: A Case Study of Cilegon, Indonesia

2018 ◽  
Vol 13 (7) ◽  
pp. 1298-1308
Author(s):  
Fatma Lestari ◽  
Dicky Pelupessy ◽  
Yasuhito Jibiki ◽  
Fiori Amelia Putri ◽  
Ahmad Yurianto ◽  
...  
Keyword(s):  
Risk Reduction ◽  
Emergency Preparedness ◽  
Disaster Risk Reduction ◽  
Health And Safety ◽  
Disaster Risk ◽  
City Government ◽  
Future Research ◽  
Technological Disaster ◽  
The Impact

Complex disasters may occur as a result of a natural disaster combined with an industrial or a technological disaster. These are also called “natural-hazard triggered technological (natech) disasters.” Currently, there is increasing awareness of the hazards of these natech disasters. Natural disasters could trigger a technological disaster including oil spills and the release of hazardous and flammable materials and toxic chemicals, causing cascading events. The impact of the damage on public health and safety could be catastrophic, as it may result in massive loss of life, environmental destruction, and asset and property loss. Moreover, it could cause business disruptions and affect a country’s reputation. This paper describes a case study on the application of disaster risk reduction and management for natech disasters in Cilegon, Indonesia. We introduce the analysis of risk assessment conducted in Cilegon, the preparedness of the Cilegon City government, a contingency plan that has been developed, and the state of disaster preparedness in industrial zones. Natural and technological disaster risks as well as several emergency preparedness efforts are discussed and multiple stakeholders are identified. The paper serves as a foundation for future research to address natech disasters.

Sign in / Sign up

Export Citation Format

Share Document